Why America Needs South Korea’s Shipyards

 

From advanced submarines to the launch of Daeho Kim Jong-seo, South Korea is demonstrating the maritime industrial strength Washington increasingly seeks

On September 30, 2026, South Korea launched another advanced Aegis destroyer at HD Hyundai Heavy Industries’ shipyard in Ulsan.

For the Republic of Korea Navy, Daeho Kim Jong-seo marked another step toward a six-ship Aegis fleet. For American observers, the launch carried an additional message: a close ally possesses the shipyards, skilled workforce, and accumulated engineering experience that Washington is increasingly looking to mobilize in support of its own maritime ambitions.

South Korea’s shipbuilding strength is already visible in working shipyards and completed vessels. As the United States seeks greater cooperation, Korea is simultaneously expanding its submarine fleet, building sophisticated surface combatants, and developing the organizations needed to operate farther from home. The strategic background is the intensifying maritime competition between the United States and China.

Widely circulated comparisons place Chinese shipbuilding capacity at roughly 230 times that of the United States. That figure requires careful interpretation: it concerns shipbuilding capacity measured by tonnage, encompassing the much larger commercial industry. It does not mean that China’s navy has 230 times the combat power of the U.S. Navy.

Nevertheless, the industrial disparity matters. Maritime power depends on the ability to build new vessels, repair existing ones, sustain operations, and replace losses over time. China’s enormous shipbuilding base has made those questions increasingly urgent for Washington. 

South Korea offers capabilities directly relevant to that problem.

Its major yards combine large-scale commercial construction with experience in submarines, destroyers, support vessels, and naval maintenance. These capabilities rest on decades of investment in engineering, production facilities, suppliers, and skilled labor. They cannot be reproduced quickly through funding announcements alone.

American interest has therefore moved beyond expressions of admiration.

In April 2025, U.S. Secretary of the Navy John Phelan visited Hanwha Ocean and HD Hyundai Heavy Industries. The Navy’s account of the visit explicitly emphasized South Korea’s expertise in maintenance, repair, and overhaul as important to improving naval operational capabilities. In February 2026, Military Sealift Command held another industry event in Busan to strengthen access to regional ship-repair capacity. 

A practical demonstration had already taken place.

In March 2025, USNS Wally Schirra, a Military Sealift Command dry cargo and ammunition ship, departed Hanwha Ocean’s yard after a major overhaul. The U.S. Pacific Fleet described the additional repair capacity in South Korea as a means of sustaining the readiness of the logistics vessels that support fleet operations.

This was a support ship, rather than an American frontline destroyer. But that distinction does not diminish the importance of the work. Combat fleets depend on replenishment vessels, and access to additional maintenance facilities helps keep those supporting ships available. Korean industrial capability was already contributing to American naval readiness. 

The cooperation also extends to rebuilding capacity inside the United States.

In October 2025, the White House announced maritime cooperation involving Korean investment in American shipyards and workers, including a planned $5 billion investment program between HD Hyundai and Cerberus Capital Management. America’s Maritime Action Plan, published in February 2026, likewise identified continued cooperation with South Korea and Japan as part of revitalizing U.S. shipbuilding.

These initiatives remain distinct from completed ships or fully realized production gains. They nevertheless show how prominently Korean expertise now figures in Washington’s industrial plans. Against that background, the launch of Daeho Kim Jong-seo offers a concrete illustration of what makes South Korea valuable.

The ship is the third and final destroyer in the Jeongjo the Great class, developed under the KDX-III Batch-II program. It measures 170 meters in length and 21 meters in beam, with a light displacement of approximately 8,200 tonnes and a maximum speed of 30 knots—about 55 kilometers per hour. Light displacement should not be confused with the ship’s fully loaded displacement. 

Its significance lies in the missions it is designed to perform.

Equipped with an advanced Aegis combat system, the destroyer belongs to a generation of Korean warships intended to support ballistic-missile detection, tracking, and interception missions. It adds a mobile maritime component to national defense, giving commanders more options for positioning sensors and defensive capabilities.

The vessel is scheduled for delivery to the navy in December 2027 after trials and performance evaluations. Its launch therefore marks an important construction milestone, with further work required before operational service. Once the planned deliveries are completed, South Korea’s Aegis force will comprise three Sejong the Great-class and three Jeongjo the Great-class destroyers. The name connects this modern capability to Korean history. Kim Jong-seo helped establish the six northern frontier garrisons during King Sejong’s reign. His name and the epithet “Daeho” now identify a warship intended to protect the country at sea.

At the launch ceremony, President Lee Jae-myung emphasized national sovereignty and the ability to defend Korea through its own capabilities, while pledging support for shipbuilding and the defense industry. 

The development of Korean maritime power is equally visible beneath the surface.

In October 2025, South Korea launched Jang Yeong-sil, the lead submarine of the KSS-III Batch-II program. Its lithium-ion batteries and improved systems are intended to increase submerged endurance and the time it can operate at high speed. These developments strengthen the submarine’s ability to remain concealed and sustain demanding missions. 

Operational experience is expanding alongside construction. In 2026, Dosan Ahn Chang-ho crossed the Pacific and participated in combined training in Canadian waters. Such deployments develop the experience required for sustained operations beyond Korea’s immediate surroundings. 

Advanced submarines and Aegis destroyers provide complementary capabilities. Submarines bring concealment and uncertainty for an adversary. Surface combatants provide visible presence, surveillance, and defensive coverage. Aircraft, helicopters, support ships, and communications allow these capabilities to function together.

South Korea has also changed its command structure to support this development. On February 1, 2025, it established its Fleet Maneuver Command, with responsibilities including maritime responses to North Korean nuclear and missile threats and the protection of sea lines of communication. Taken together, these developments suggest a widening maritime strategy. Defense of the peninsula remains central, while protecting the routes that connect Korea to overseas markets and energy supplies receives increasing operational attention.

For a trading nation, the ability to operate at sea has direct economic consequences. Disruption far from Korean shores can affect factories, shipping schedules, energy costs, and household livelihoods. A navy with greater endurance and more deployable assets gives the government additional ways to respond.

For the United States, this makes South Korea important in two related ways.

Korea is building more capable forces of its own, increasing the contribution it can make to regional security. At the same time, its industrial base can help address American needs in maintenance, investment, production methods, and workforce development.

The launch at Ulsan was not itself an American procurement event. Its significance for Washington lies in what it demonstrated: Korean yards continue to turn engineering expertise and industrial capacity into sophisticated naval vessels, while American officials actively seek deeper access to that experience.

Cooperation will require sustained investment and careful implementation. Neither maintenance agreements nor industrial partnerships instantly resolve America’s shipbuilding challenges. Korea must also preserve sufficient capacity for its own fleet, commercial customers, and workforce.

But the direction is clear. Korean shipbuilding has become a resource of considerable strategic value to the United States—and a source of greater influence for South Korea within the alliance.

As Daeho Kim Jong-seo proceeds through trials toward delivery, it will represent more than an addition to Korea’s order of battle. Alongside new submarines and expanding operational capabilities, it demonstrates a country steadily converting industrial strength into maritime power.

That is why Washington is paying attention.

At a time when the ability to build and sustain fleets has become a central strategic concern, South Korea possesses working yards, experienced people, and a record of delivering advanced ships. The launch of another Aegis destroyer makes that value visible.

[Korean Ancient History] The Army That Stopped an Empire: Goguryeo’s Victory over Tang Taizong

In the autumn of 645, one of the most powerful rulers in the world turned his army away from a fortress he could not conquer.

He was Li Shimin, known to history as Emperor Taizong of Tang. A veteran commander who had helped establish his dynasty, he had defeated formidable rivals and extended his empire’s influence across much of Asia. He had marched against Goguryeo expecting another triumph.

Instead, Goguryeo remained standing.

The fortress was Ansi. Its commander’s name was not preserved in the principal historical accounts. Yet what he and his people accomplished became one of the most enduring stories in Korean history: a defending army and community holding their ground until an emperor’s invasion could go no farther.

For readers unfamiliar with Korea’s ancient past, the story begins beyond the borders of the modern Korean Peninsula.

Goguryeo was a major kingdom extending across northern Korea and substantial parts of what is now northeastern China. Its capital was Pyongyang, but its western defenses lay far beyond the Yalu River, in Liaodong. To its inhabitants, this region was home—a landscape of farms, settlements, military strongholds, and routes connecting generations of Goguryeo life.

For centuries, the kingdom had maintained its own political identity while competing and negotiating with Chinese dynasties, northern peoples, and neighboring Korean states. Its independence faced a particular danger whenever a powerful empire united China and turned its attention eastward.

That danger had arrived before.

In the early seventh century, the Sui dynasty repeatedly invaded Goguryeo. In 612, the Goguryeo commander Eulji Mundeok inflicted a devastating defeat on a Sui expedition, remembered in Korea as the victory at the Salsu River. When Tang later prepared its own invasion, Goguryeo still carried the experience of those earlier wars.

Its people knew what imperial conquest meant. They also knew that an invading empire could be resisted.

Relations with the newly established Tang dynasty initially allowed room for diplomacy. But as Tang power expanded, the pressure on Goguryeo increased. The kingdom strengthened its western defenses, while the Tang court gathered information about its territory and military preparations.

In 642, the powerful Goguryeo statesman and military leader Yeon Gaesomun seized power in a violent coup. Taizong invoked the killing of Goguryeo’s king as a justification for intervention. Appeals for assistance from Silla, Goguryeo’s rival on the peninsula, added another dimension to the conflict.

For the people defending Goguryeo’s frontier, however, the immediate issue was clear: a foreign emperor was preparing to enter their country and impose his will by force. National Institute of Korean History, “The Goguryeo–Tang War”

Taizong committed an enormous military effort.

Tang armies approached by land and sea. Experienced generals commanded the expedition, supported by siege equipment, transport ships, and supply arrangements. The emperor himself joined the campaign.

The exact number of troops remains debated. A Korean historical overview estimates total mobilization at more than 300,000. A 2022 study published in the Korean military-history journal Gunsa, using recorded grain supplies to estimate troop strength, proposed a minimum of approximately 403,000 to 422,000 soldiers, including naval forces.

These are scholarly estimates, not a surviving, complete military roll. Nor should the soldiers alone be confused with everyone whose labor sustained the expedition. Shipbuilding, transport, construction, and provisioning extended the demands of war far beyond the battlefield. Choi Jin-yeol, “Tang Taizong’s Expedition against Goguryeo and the Strength of the Tang Army”

Goguryeo therefore faced a formidable concentration of imperial power.

The opening campaign demonstrated how dangerous that power was.

Tang forces crossed the Liao River and attacked Goguryeo’s western strongholds. Their greatest early success was the capture of Liaodong Fortress, a central pillar of the kingdom’s defenses.

The Samguk Sagi, the Korean history compiled in the twelfth century, describes how Tang troops exploited a strong wind to set a tower ablaze. Fire spread through the fortress, and the attackers assaulted its walls. The defenders fought but could not hold.

The record lists heavy losses among soldiers and civilians, along with the seizure of a vast quantity of grain. Other strongholds also fell.

Goguryeo’s victory in 645 did not emerge from an uninterrupted sequence of successes. It came after burning fortresses, lost supplies, captured inhabitants, and severe military reverses. That is what gives the resistance at Ansi its significance. Samguk Sagi, “The Fall of Liaodong Fortress”

As Tang forces approached Ansi, Goguryeo dispatched a large relief army under Go Yeonsu and Go Hyejin. The historical accounts put its strength at 150,000, including Malgal troops.

The relief effort ended in disaster.

According to the Samguk Sagi, the experienced Go Jeongui advised against a direct confrontation. He urged the commanders to prolong the campaign and disrupt the invaders’ supplies. The relief army instead advanced into battle, where Tang maneuvering and attacks from multiple directions broke its resistance. Its commanders surrendered.

Ansi’s defenders now faced the imperial army after the force sent to rescue them had been defeated. Samguk Sagi, “Go Yeonsu Advances”

They continued to fight.

Ansi mattered because an invading army could not safely treat every unconquered fortress as an obstacle to be walked around. A defending garrison left behind could threaten supply convoys and routes of retreat. Advancing farther into Goguryeo while leaving hostile forces in the rear carried serious risks, especially with the emperor present.

The resistance of one fortress could therefore affect the prospects of an entire expedition.

Tang troops brought siege engines against the walls. Stones battered defensive structures. Repeated assaults tested the garrison.

The defenders repaired the damage. Where walls or towers were broken, they erected wooden barriers. As the attackers changed their methods, the defenders adjusted their positions.

These brief entries in the historical record reveal sustained organization. A fortress could endure such fighting only through the combined efforts of its commanders, soldiers, and supporting population. Combat and repair had to continue together.

Most of those people left no names in history. Their work survives in the record of a wall repeatedly damaged and repeatedly defended.

Later Korean tradition called the commander Yang Man-chun. That name appears in later literature rather than the principal accounts of the campaign. But the commander’s achievement is firmly embedded in the historical narrative. Kim Busik, the compiler of the Samguk Sagi, regretted that the name of such an outstanding defender had not been preserved. Academy of Korean Studies, “Yang Man-chun”

As the siege continued, Tang forces undertook an immense construction project: an earthen mound beside the fortress.

The mound would give the attackers an elevated position overlooking the defenses and a means of approaching the walls. The Samguk Sagi describes approximately sixty days of work.

Then part of the mound collapsed, damaging a section of the fortress wall.

It was a dangerous moment for Ansi. Yet the defenders seized the opportunity. Goguryeo troops emerged, occupied the mound, and established a defensive position on it. Tang attempts to recover it failed.

The attackers had spent weeks constructing an advantage that the defenders took from them.

Ansi’s resistance involved more than endurance. Its troops responded decisively when an opportunity appeared, turning a crisis at their own walls into a setback for the besieging army. Samguk Sagi, “Tang Constructs an Earthen Mound”; National Institute of Korean History, Ansi campaign records

Meanwhile, the season was changing.

The army that had entered Liaodong in spring was still campaigning as autumn advanced. Soldiers needed food. Horses needed fodder. Transport demanded labor and protection. Every additional day before Ansi consumed resources and narrowed the time available for further operations.

Goguryeo’s defenders were imposing a cost that battlefield victories elsewhere had not removed.

On the eighteenth day of the ninth lunar month, Taizong ordered the withdrawal.

Ansi had held. Goguryeo’s government remained intact. Pyongyang had not fallen. The emperor had captured important strongholds and defeated a major relief army, but he had failed to turn those achievements into the submission of the kingdom.

Goguryeo had won the strategic contest of 645. National Institute of Korean History, “The War between Goguryeo and Tang”

The journey home exposed the expedition to further hardship.

The Samguk Sagi records that mud in the Liao marshlands obstructed horses and wagons. Thousands of men were assigned to cut vegetation and fill a passage; wagons were used to bridge deeper water. Cold and snow compounded the difficulties of withdrawal.

Exactly how many soldiers returned alive cannot be established from the surviving evidence. The transmitted campaign summary gives approximately 2,000 Tang combat deaths, a figure that cannot simply be subtracted from a modern estimate of the expedition’s total strength to produce a reliable survivor count. Korean historical commentary has questioned whether the recorded losses adequately reflect the damage suffered.

The same transmitted record reports the death of seven or eight out of every ten warhorses—an immense loss to an army dependent on mobility and transport. That figure concerns horses, not the proportion of soldiers killed. Samguk Sagi, the retreat through the Liao marshes; Academy of Korean Studies, “The Battle of Ansi”; Korean History Database, campaign-loss record

Taizong did not immediately abandon his ambition.

He ordered further attacks and prepared another major expedition. Goguryeo continued to resist. When he died in 649, he had still not conquered the kingdom.

The Samguk Sagi preserves a final instruction: he ordered the Liaodong campaign discontinued in his testament.

The emperor who had personally led the invasion thus ended his life without achieving its objective, leaving an order to halt the renewed campaign. His successor would eventually resume the war, but Taizong’s own struggle with Goguryeo had ended in failure. Samguk Sagi, “The Death of Tang Taizong”

Goguryeo would fall in 668, under a different Tang emperor and profoundly changed circumstances. Prolonged warfare, cooperation between Tang and Silla, and division within Goguryeo’s leadership would combine to destroy the kingdom.

That later defeat does not diminish what its people accomplished in 645.

They had faced an emperor at the height of his military prestige. They had suffered grievous losses and continued to resist. At Ansi, disciplined defense, relentless repair, and timely counterattack brought the imperial advance to a halt.

The defenders did not need to destroy every invading soldier to win. They needed to deny the emperor the conquest he had come to achieve.

They did.

In the autumn of 645, Taizong went home.

The people of Ansi remained on their own ground.

Swimming by the Hangang River

 

A Detailed Guide to Seoul’s 2026 Hangang Park Swimming Pools and Water Playgrounds

One of the most affordable ways to escape Seoul’s summer heat is to visit one of the city’s seasonal outdoor swimming pools and water playgrounds along the Hangang River, often called the Han River in English.

These facilities are located inside Seoul’s riverside parks. Visitors do not swim directly in the river itself. Instead, the city operates purpose-built outdoor pools and shallow water-play areas beside the river, offering swimming, family water play, shaded rest spaces, and evening entertainment against the backdrop of Seoul’s skyline.

For the 2026 summer season, six facilities are open: two outdoor swimming-pool complexes at Ttukseom and Yeouido, and four shallower water playgrounds at Jamsil, Gwangnaru, Nanji, and Yanghwa. They are considerably cheaper than hotel pools and private water parks, making them especially attractive to families, students, long-term visitors, and budget-conscious travellers. (Seoul City Government)

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1. Essential Information

Operating season:
Friday, June 19–Sunday, August 30, 2026

Closing days:
There are no regularly scheduled closing days during the operating period.

General operating hours:
9:00 a.m.–10:00 p.m.

Exceptions:
Gwangnaru and Yanghwa Water Playgrounds close at 6:00 p.m.

Temporary closures:
Entry may be suspended because of heavy rainfall, flooding, water-quality concerns, or other safety conditions. Visitors should check same-day announcements, particularly after prolonged rain. (Seoul City Government)

Mandatory breaks

Visitors cannot remain in the water continuously throughout the day. Water entry is suspended during the following meal and maintenance periods:

• Lunch break: 12:00 noon–1:00 p.m.

• Dinner break: 5:30 p.m.–7:00 p.m.

Additional short safety or maintenance breaks may be announced at individual facilities. Everyone must leave the water when instructed by lifeguards, even if they intend to remain inside the facility. (Seoul City Government)

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2. Admission Fees

Outdoor swimming pools

Ttukseom and Yeouido

Age category	Admission
Children aged 6–12	KRW 3,000
Teenagers aged 13–18	KRW 4,000
Adults aged 19 and over	KRW 5,000

Water playgrounds

Jamsil, Gwangnaru, Nanji, and Yanghwa

Age category	Admission
Children aged 6–12	KRW 1,000
Teenagers aged 13–18	KRW 2,000
Adults aged 19 and over	KRW 3,000

Children aged five and under may enter free of charge, but an original document proving the child’s age may be required. The official guidance states that photographs of supporting documents are not accepted, so families should bring an appropriate original document or confirm acceptable identification with the facility in advance. (Seoul City Government)

A 50 per cent discount is available to several eligible groups, including visitors aged 65 and over, registered disabled visitors and one accompanying carer, recognised veterans, qualifying Seoul multi-child-family cardholders, and certain other officially designated groups. Supporting identification or documentation is required. Foreign visitors who believe they qualify should ask the ticket office before purchasing admission. (Hangang)

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3. Choosing the Right Location

The six facilities differ considerably in size, depth, transport convenience, and atmosphere.

Ttukseom Hangang Park Swimming Pool

Best for: First-time visitors, families with children of different ages, and anyone wanting the widest variety of pools.

Ttukseom is probably the easiest all-round recommendation. It contains four separate water areas:

• Lazy River Pool: approximately 910 m², depth 1 metre

• Adult Pool: approximately 3,020 m², depth 0.6–1 metre

• Children’s Pool: approximately 500 m², depth 0.6 metre

• Toddler Pool: approximately 210 m², depth 0.4 metre

The lazy river is its most distinctive feature. Children must be accompanied by a guardian, and all users—including adults—must wear an approved flotation device in the lazy river. Small arm floaties are not accepted as substitutes. (Seoul City Government)

Address:
112 Jayang-dong, Gwangjin-gu, Seoul

Public transport:
Take Subway Line 7 to Jayang Station, officially named Jayang (Ttukseom Hangang Park) Station. Use Exit 2 or 3 and walk for approximately five minutes.

Telephone:
+82-2-452-5955 (Hangang)

Because it is close to a subway station and includes separate areas for toddlers, children, and adults, Ttukseom is generally the most convenient option for foreign families unfamiliar with Seoul.

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Yeouido Hangang Park Swimming Pool

Best for: Visitors staying in central or western Seoul, mixed-age families, and people interested in evening entertainment.

Yeouido has three pools:

• Youth and Adult Pool: approximately 2,200 m², depth 1 metre

• Children’s Pool: approximately 2,350 m², depth 0.6 metre

• Toddler Pool: approximately 200 m², depth 0.4 metre

Despite being called an adult pool, the water is relatively shallow. The facility is therefore better suited to recreational swimming, cooling off, and family play than to serious lap swimming. (Seoul City Government)

Address:
82-9 Yeouido-dong, Yeongdeungpo-gu, Seoul

Public transport:
Take Subway Line 9 to National Assembly Station, use Exit 1, and walk for approximately 15 minutes.

Telephone:
+82-2-785-0478 (Hangang)

Evening DJ programme

From July 24 through August 30, live DJ performances are scheduled at the Yeouido pool every Friday, Saturday, and Sunday from 7:00 p.m. to 9:00 p.m. The programme is included in the normal admission price and does not require an additional performance ticket. (Hangang)

Yeouido is a particularly good choice for visitors who want to combine swimming with an evening picnic, riverside walk, or night view of Seoul.

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Jamsil Hangang Park Water Playground

Best for: Families staying near Jamsil, Songpa, Lotte World, or southeastern Seoul.

Jamsil is officially classified as a water playground rather than a full swimming pool. It contains three separate areas:

• Toddler Pool: approximately 151 m², maximum depth 0.3 metre

• Joy Pool: approximately 864 m², maximum depth 0.6 metre

• Wonder Pool: approximately 4,453 m², maximum depth 1 metre

The range of depths makes it suitable for families with both younger and older children. (Seoul City Government)

Address:
1-1 Jamsil-dong, Songpa-gu, Seoul

Public transport:
Take Subway Line 2 to Jamsilsaenae Station, use Exit 7, and walk for approximately 15 minutes.

Telephone:
+82-2-3431-8475 or +82-2-3431-8476 (Hangang)

Drivers should note that access through the former Hangang Park Parking Lot 4 is currently unavailable. Official guidance directs Jamsil Water Playground visitors towards Parking Lot 5, entering through the Parking Lot 1 side. Public transportation is still the simpler option during busy summer periods. (Hangang)

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Gwangnaru Hangang Park Water Playground

Best for: Families with toddlers and younger children who prefer a quieter, shallower environment.

Gwangnaru has two main areas:

• Family Pool: approximately 1,249 m², maximum depth 1 metre

• Toddler Pool: approximately 573 m², maximum depth 0.3 metre

It closes earlier than most other locations, at 6:00 p.m. (Seoul City Government)

Address:
351-1 Cheonho-dong, Gangdong-gu, Seoul

Public transport:
Take Subway Line 8 to Amsa Station, use Exit 3, and walk for approximately 20 minutes.

Telephone:
+82-2-470-9561 (Hangang)

Because the station is not immediately beside the facility, families carrying strollers, tents, or large bags may find a short taxi ride from the station more comfortable.

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Yanghwa Hangang Park Water Playground

Best for: Young children, relaxed water play, and visitors who do not need deep water or late-night opening.

Yanghwa consists of one water-play pool:

• Total area: approximately 1,700 m²

• Maximum depth: 0.8 metre

Like Gwangnaru, it closes at 6:00 p.m. (Seoul City Government)

Address:
1-4 Yanghwa-dong, Yeongdeungpo-gu, Seoul

Public transport:
Take Subway Line 9 to Seonyudo Station, use Exit 2, and walk for approximately 20 minutes.

Telephone:
+82-70-8858-5460 (Hangang)

Yanghwa is a sensible choice for families seeking a compact daytime facility rather than a large, crowded swimming complex.

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Nanji Hangang Park Water Playground

Best for: Spacious riverside water play, western Seoul, and visitors combining swimming with Nanji Hangang Park or the nearby camping area.

Nanji has one broad water-play area:

• Total area: approximately 3,500 m²

• Maximum depth: 1 metre

It is large enough to feel more open than some of the smaller neighbourhood water playgrounds, while still being relatively shallow. (Seoul City Government)

Address:
482-454 Sangam-dong, Mapo-gu, Seoul

Public transport:
Bus 9707 stops near Nanji Hangang Park, followed by an approximately ten-minute walk. From World Cup Stadium Station on Subway Line 6, the walk may take approximately 30–40 minutes, so a bus or taxi is usually more practical.

Telephone:
+82-70-7715-3934 (Hangang)

Saturday DJ programme

From August 8 through August 30, a DJ performance programme is scheduled at Nanji every Saturday from 7:00 p.m. to 9:00 p.m. It is included with normal admission. (Hangang)

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4. Swimming Clothes and Required Equipment

Everyone entering the water must wear:

• A proper swimsuit or suitable swimming clothing

• A swimming cap

A baseball-style cap is accepted in place of a traditional swimming cap. Visitors arriving without appropriate swimming clothes or head covering may be refused water entry. (Seoul City Government)

A rash guard is a practical option because it offers sun protection and is widely worn at Korean outdoor swimming facilities. Visitors should also bring:

• Towel

• Change of clothes

• Waterproof bag for wet items

• Goggles

• Sunscreen

• Sun hat

• Shower supplies

• Drinking water

• Snacks or a packed meal

• Waterproof phone case

• Identification and age documents for children receiving free entry

The city specifically recommends bringing plenty of drinking water and allows visitors to bring snacks and packed meals. (Seoul City Government)

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5. Equipment That Is Not Allowed

For safety and crowd management, the following items are prohibited:

• Large inflatable tubes

• Swimming fins

• Snorkels

• Kickboards

• Pull buoys

• Hand paddles

• Other large or specialised training equipment

Small, ordinary flotation tubes and approved life jackets may be used where permitted. Children entering pools intended for teenagers or adults must wear an approved flotation device and remain with a guardian. (Seoul City Government)

Visitors planning to buy a tube in Korea should choose a modestly sized one rather than a very large novelty float.

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6. Rules for Children

Infants and children cannot enter without a parent or guardian.

For organised groups, at least one adult guardian is required for every four children. Guardians must remain responsible for the children rather than watching from a distant seating or picnic area. (Seoul City Government)

Pool depth should not be treated as a substitute for supervision. Even the adult pools are generally no more than one metre deep, but younger children may still need life jackets or tubes and must follow the instructions of safety personnel.

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7. Shade, Tents, Lockers, and Rest Areas

Free parasols are available in limited numbers. Official guidance states that approximately one parasol is provided for every four visitors, while the Korean facility guidance describes them as available on a first-come, first-served basis. Arriving early is therefore advisable on weekends. (Seoul City Government)

Visitors may bring a picnic mat or an approved shade tent. The official 2026 guidance specifically notes:

• At Ttukseom, only pop-up-style tents are permitted.

• At Yeouido and Nanji, ordinary shade tents are permitted.

Tent placement and size may still be controlled by staff, especially when the facility is crowded. (Seoul City Government)

Valuables should be placed in designated lockers. The facilities do not accept responsibility for lost belongings, so passports, large amounts of cash, jewellery, and unnecessary electronics are best left at the hotel. (Seoul City Government)

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8. Hygiene and Safety

Before entering the water, visitors should shower and complete a short warm-up or stretching routine.

Anyone with an infectious eye condition, skin infection, or another illness that could affect public hygiene may be refused admission. Visitors must not spit or blow their nose in the water. (Hangang)

All visitors must follow instructions from lifeguards and facility staff. Failure to comply may result in removal from the premises. Smoking inside the facility should also be avoided. (Hangang)

Seoul has installed CCTV cameras, English-language signs, and additional safety personnel at the facilities. The city also states that water-quality inspections are conducted daily, with additional detailed testing carried out regularly during the operating season. (파이낸셜뉴스)

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9. Tickets and Online Booking

Tickets can generally be purchased at the entrance during operating hours. The official Seoul guidance specifically confirms entrance ticket sales for Ttukseom Swimming Pool and Jamsil Water Playground. (Seoul City Government)

Some facilities also provide online reservations through Naver Maps. Visitors should search for the Korean or English name of the relevant pool in Naver Maps and check whether a reservation button appears on the venue page. Availability may differ by facility and date. (Hangang)

Foreign visitors without a Korean Naver account or Korean payment method may find on-site ticket purchase easier. On hot weekends, however, arriving before the preferred swimming period is wise because ticket lines and entry waiting times can become long.

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10. Best Time to Visit

For families with young children, arriving near the 9:00 a.m. opening time offers cooler temperatures, shorter queues, and a better chance of finding shade.

Visitors interested in the evening atmosphere should choose Ttukseom, Yeouido, Jamsil, or Nanji, which remain open until 10:00 p.m. under the current late-summer schedule. Gwangnaru and Yanghwa close at 6:00 p.m. (Seoul City Government)

Because water entry stops between 12:00 noon and 1:00 p.m. and again between 5:30 p.m. and 7:00 p.m., arriving just before those breaks may result in a long wait. A practical plan is to enter during one of these periods:

• Morning visit: approximately 9:00 a.m.–12:00 noon

• Afternoon visit: approximately 1:00 p.m.–5:30 p.m.

• Evening visit: approximately 7:00 p.m.–10:00 p.m.

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11. Recommended Choices for Foreign Visitors

For the simplest first visit, choose Ttukseom. It is only a short walk from the subway and offers the greatest variety of pools.

For a central location and evening entertainment, choose Yeouido.

For families staying around Lotte World or southeastern Seoul, choose Jamsil.

For toddlers and a quieter daytime visit, consider Gwangnaru or Yanghwa.

For a spacious riverside atmosphere and Saturday-night DJ events, choose Nanji, although its public-transport access is less convenient than Ttukseom’s.

These recommendations are practical comparisons based on each facility’s pool depth, size, transport access, and operating programme. (Seoul City Government)

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12. Final Checklist

Before leaving for the pool, make sure you have:

• Swimsuit or rash guard

• Swimming cap or baseball cap

• Towel

• Change of clothes

• Sunscreen

• Drinking water

• Waterproof bag

• Small flotation tube or life jacket, when needed

• Original proof of age for children aged five and under

• Payment method for admission

• Naver Maps or another Korean navigation application

Use public transportation whenever possible. Roads and parking areas around Hangang Park become heavily congested during hot weekends and evening events. (Seoul City Government)

For multilingual tourism assistance, visitors may contact the Korea Travel Hotline by dialling 1330 in Korea. Assistance is available in languages including English, Japanese, and Chinese. (VISITKOREA - Imagine Your Korea)

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Important Reminder

The 2026 Hangang Park swimming season ends on August 30, 2026. Operating hours, water entry, performances, and facility access may change because of heavy rain, flooding, extreme weather, maintenance, or safety inspections. Checking the official Hangang Park or Seoul Metropolitan Government announcement on the morning of your visit is strongly recommended. (Seoul City Government)

Free Water Play at Gwanghwamun Square

2026 Seoul Summer Beach Festival Poster

 

A Detailed Guide to the 2026 Seoul Summer Beach Festival

Looking for an easy and inexpensive way to cool down in central Seoul? 2026 Seoul Summer Beach has transformed Gwanghwamun Square and the nearby Sejongno Park into a temporary urban water-play area, complete with swimming pools, an eight-metre-high water slide, a giant tipping water bucket, a shallow inflatable pool for younger children, a sand-play area, food trucks, and shaded rest spaces.

The festival is currently running and will continue until Sunday, August 9, 2026. Admission is free. The main festival area is located at Gwanghwamun Square and Sejongno Park, directly in the historic centre of Seoul.

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1. Basic Information

Event: 2026 Seoul Summer Beach
Dates: July 20–August 9, 2026
Location: Gwanghwamun Square and Sejongno Park
Admission: Free
Main operating hours: Approximately 1:00 p.m.–10:00 p.m.
Festival information number: 02-6941-0645
International telephone format: +82-2-6941-0645

Important note about the operating hours

Some official festival summary pages still display 1:00 p.m.–9:00 p.m., while Seoul Metropolitan Government’s more detailed event information lists the general festival hours as 1:00 p.m.–10:00 p.m. The detailed Water Wave Zone timetable also includes sessions continuing until 10:00 p.m., or until 10:30 p.m. for the special Friday and Saturday night session. Visitors should therefore check the detailed session schedule and same-day announcements before travelling.

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2. The Water Wave Zone

The main attraction is the Water Wave Zone, which includes:

• A large outdoor swimming pool

• An eight-metre-high water slide

• A large water bucket that releases water at intervals

• A shallow inflatable pool designed for babies and younger children

• Safety staff and controlled entry by session

The swimming and water-play facilities use a timed-entry system to prevent overcrowding and allow regular cleaning, equipment inspections, and water-quality management. Regular entry is handled through on-site registration, after which visitors receive a coloured admission wristband for a particular session. Capacity is limited, so arriving early is strongly recommended, especially on weekends and during late-afternoon sessions.

Let's Water-Play at Gwangwhamun Square

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3. Regular Water-Play Session Times

Sunday through Thursday

The detailed Water Wave Zone schedule lists the following sessions:

• Session 1: 1:00 p.m.–2:10 p.m.

• Session 2: 2:30 p.m.–3:40 p.m.

• Session 3: 4:00 p.m.–5:10 p.m.

• Cleaning and water-quality maintenance: 5:10 p.m.–5:50 p.m.

• Session 4: 5:50 p.m.–7:00 p.m.

• Session 5: 7:20 p.m.–8:30 p.m.

• Session 6: 8:50 p.m.–10:00 p.m.

Regular sessions accommodate up to approximately 700 wristband holders, subject to on-site safety and capacity controls.

Friday and Saturday

The daytime and early-evening sessions are broadly similar, but the final session is a special night programme:

• Session 1: 1:00 p.m.–2:10 p.m.

• Session 2: 2:30 p.m.–3:40 p.m.

• Session 3: 4:00 p.m.–5:10 p.m.

• Cleaning and water-quality maintenance: 5:10 p.m.–5:50 p.m.

• Session 4: 5:50 p.m.–7:00 p.m.

• Session 5: 7:20 p.m.–8:30 p.m.

• Adult-only night session: 9:00 p.m.–10:30 p.m.

The final Friday and Saturday session is an adults-only programme and is limited to advance reservation holders. The detailed timetable lists a capacity of approximately 400 people for this session. Visitors planning to attend should check the official Seoul Summer Beach social-media announcements for the latest reservation instructions and identification requirements.

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4. What You Must Wear

Visitors entering the swimming pool must wear appropriate swimming clothes.

Required or permitted clothing includes:

• A swimsuit or clothing made from proper swimwear material

• A swimming cap

• A regular baseball-style cap may be accepted instead of a traditional swimming cap

• Aqua shoes

• Bare feet are allowed when aqua shoes are not available

The organisers do not allow ordinary cotton T-shirts, jeans, or other clothing unsuitable for swimming. Bare upper bodies are also prohibited, so male visitors should bring a rash guard or another appropriate swimming top.

A rash guard is therefore one of the safest and most convenient clothing choices, particularly for foreign visitors who may be unfamiliar with local swimming-pool dress rules.

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5. What to Bring

A practical packing list would include:

• Swimsuit or rash guard

• Swimming cap or suitable cap

• Aqua shoes

• Towel

• A complete change of clothes

• Waterproof bag for wet clothing

• Sunscreen

• Refillable water bottle

• Waterproof phone case

• Small plastic bag for personal items

• Identification, particularly when attending an adult-only programme

Large flotation devices and specialised swimming equipment are not permitted. Visitors should leave large tubes, flippers, snorkels, and kickboards at their accommodation.

Because Seoul is currently experiencing very hot weather, the city advises visitors to drink water regularly, take frequent breaks, and avoid excessive outdoor activity during the hottest part of the day. Rest areas and drinking-water facilities are available around Gwanghwamun Square.

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6. Rules for Children and Families

Babies and young children cannot enter the water-play area without a parent or guardian.

For organised groups of babies or young children, at least one accompanying adult is required for every four children. Parents and guardians must remain attentive and follow the instructions of the safety staff.

The shallow inflatable pool is particularly suitable for families with younger children, although all facilities remain subject to capacity restrictions and safety decisions made by on-site staff.

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7. Safety and Health Rules

Visitors must follow the directions of the lifeguards and safety staff. Anyone who refuses to follow safety instructions may be restricted from using the facilities or asked to leave.

Swimming-pool entry is not permitted for visitors with infectious eye conditions, skin conditions, or other illnesses that could affect public hygiene. Anyone who feels dizzy, unwell, overheated, or physically uncomfortable while swimming should leave the water immediately and inform a member of staff.

Pets are not permitted inside the controlled water-play area.

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8. Changing Rooms, Showers, Lockers, and Rest Areas

The Water Wave Zone provides:

• Changing rooms

• Simple rinse-off shower facilities

• Lockers or storage facilities

• Safety and support staff

The showers are intended only for a quick rinse with water. Shampoo, soap, body wash, and other shower products are not permitted. Visitors are asked to rinse before entering the pool and to take care because the floors may be slippery.

Locker capacity is limited, so families and groups are encouraged to share storage space rather than using one locker per person. Valuable belongings should be kept securely, as the organisers do not accept responsibility for lost personal property.

Additional free changing rooms, drying facilities, and shaded pergola rest areas are available near the Hangeul Fountain area. These supporting facilities are scheduled to operate daily from 11:00 a.m. to 9:00 p.m. through August 9.

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9. Free Splash Fountains at Gwanghwamun Square

Visitors who do not wish to enter the swimming-pool area can still enjoy the public fountains at Gwanghwamun Square.

The three main water features are:

• Myeongnyang Fountain

• Hangeul Fountain

• Tunnel Fountain

Following an official operating-time update issued on August 3, the fountains are currently scheduled to operate daily from 11:00 a.m. to 9:00 p.m., with the same hours on weekdays, weekends, and public holidays. This schedule applies through August 31, 2026.

The fountains may be temporarily stopped because of rain, strong wind, maintenance, water-quality checks, or other safety concerns. Visitors should therefore check the latest Gwanghwamun Square announcements before departure.

The fountains are a convenient option for families who want a shorter and less structured water-play experience without registering for a timed swimming-pool session.

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10. Sand Play, Market Stalls, and Food Trucks

The Play Wave Zone includes the Sand Hideout, a dome-shaped sand-play area approximately twelve metres in diameter.

It operates in nine approximately 50-minute sessions:

• 1:00 p.m.–1:50 p.m.

• 2:00 p.m.–2:50 p.m.

• 3:00 p.m.–3:50 p.m.

• 4:00 p.m.–4:50 p.m.

• 5:00 p.m.–5:50 p.m.

• 6:00 p.m.–6:50 p.m.

• 7:00 p.m.–7:50 p.m.

• 8:00 p.m.–8:50 p.m.

• 9:00 p.m.–9:50 p.m.

Each session has a capacity of approximately 50 visitors, generally divided between advance reservations and a limited number of on-site places. Advance reservations that are not claimed within ten minutes of the session’s starting time may be treated as no-shows and released to on-site visitors. The sand area is normally used barefoot, and visitors should dry themselves completely before entering.

The Play Market Zone includes small-business market stalls and food trucks selling snacks, meals, drinks, and summer goods, allowing visitors to stay in the festival area without leaving to find food.

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11. How to Get There

Public transport is strongly recommended because Gwanghwamun is one of central Seoul’s busiest districts.

From Gwanghwamun Station

Take Seoul Subway Line 5 to Gwanghwamun Station.

The most convenient routes are:

• The underground passage connecting directly to Haechi Madang

• Exit 7, toward the Gwanghwamun Square forest area

From Gyeongbokgung Station

Take Seoul Subway Line 3 to Gyeongbokgung Station and use:

• Exit 6, toward the Government Complex and Gwanghwamun

Both stations are within walking distance of the festival area.

For taxi or navigation applications, search for:

Gwanghwamun Square
Korean: 광화문광장

The main water-play facilities are positioned around Gwanghwamun Square and Sejongno Park, near the King Sejong statue area.

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12. Recommended Visiting Strategy

For the most comfortable experience:

1. Arrive before your preferred session, particularly on weekends.

2. Register on site and obtain the correct coloured wristband.

3. Change into swimwear before the session begins.

4. Keep the wristband on throughout the session, including during any temporary exit.

5. Use shaded rest areas and drink water frequently.

6. Avoid bringing excessive luggage because locker space is limited.

7. Check the weather forecast and official same-day announcements.

8. Consider visiting after 5:00 p.m. to avoid the strongest afternoon sun.

9. Families seeking a simpler visit may use the fountains instead of the controlled swimming-pool zone.

10. Allow additional time to explore Gwanghwamun Square, Gyeongbokgung Palace, Cheonggyecheon Stream, or the surrounding historic district.

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13. Final Reminders

• Admission is free, but entry to controlled areas is limited by capacity.

• Regular water-play sessions require on-site registration and a wristband.

• Swimwear and a swimming cap are required.

• Cotton T-shirts and jeans are not permitted in the swimming pool.

• Wear aqua shoes or enter barefoot.

• Bring a rash guard because bare upper bodies are not allowed.

• Large tubes, fins, snorkels, and kickboards are prohibited.

• Young children must be accompanied by a guardian.

• Shower facilities are for rinsing with water only.

• Fountain and festival schedules may change because of weather, safety inspections, or operational conditions.

• The festival ends on Sunday, August 9, 2026.

As the event is taking place during a period of extreme summer heat, visitors should drink plenty of water, rest frequently, use shaded areas whenever possible, and avoid remaining in direct sunlight for long periods.