When Do Japan's Beaches Open in 2026? Swimming Season Dates by Region
When Do Japan's Beaches Open in 2026? Swimming Season Dates by Region
Most Japanese beaches are only open for swimming during a fixed season. A beach holds an "umibiraki" (海開き), the official opening, then staffs the sand with lifeguards or safety supervisors, sets up showers and changing rooms, and posts swimming hours. Outside that window there are no lifeguards, the facilities are shut, and at some beaches swimming is discouraged or banned.
On the mainland the season is short, usually a few weeks from July into late August. In Okinawa and the southern islands it is much longer, running from spring into autumn. This guide lists the 2026 swimming season for every beach on Japan Voyage, grouped by region.
Important: beach opening dates and hours change every year, and they can shift further because of weather (including typhoons), water quality, jellyfish, or construction work. Treat the dates below as a planning guide and always confirm on the beach's official site before you travel.
Planning with the 2026 season dates
The dates below describe the 2026 scheduled swimming season, not live opening status. As of 18 September 2026 every mainland season on this page has ended: Shirahama in Wakayama closed last, on 13 September, after Ohama on 31 August and Jodogahama on 30 August. Only Okinawa and the southern islands are still swimming, with Ishigaki running into late October, Miyako-jima into November and the Kerama Islands through autumn. Supervision there is set beach by beach, so check the operator before setting out.
Shirahama tourism association: 2026 beach seasons
Jellyfish precautions and first aid depend on the species. Ask the lifeguard for help after a sting and follow Okinawa Prefecture's official guidance. Do not apply advice for an identified habu-kurage sting to an unidentified animal.
2026 Season at a Glance
- Suma Beach (Kobe, Hyogo): 9 July to 23 August 2026, closed for 2026
- Ohama Beach (Sumoto, Awaji): 10 July to 31 August 2026, closed for 2026
- Nushima Beach (Awaji): 18 July to 18 August 2026, closed for 2026
- Ama Beach (Minamiawaji, Awaji): 4 July to 23 August 2026, closed for 2026
- Keino Matsubara Beach (Awaji): 11 July to 23 August 2026, closed for 2026
- Zenigahama (Echizen, Fukui): 15 July to 20 August 2026, closed for 2026
- Shirahama Beach (Wakayama): 3 May to 13 September 2026, closed for 2026
- Jodogahama Beach (Miyako, Iwate): 4 July to 30 August 2026, closed for 2026, last supervised days 29–30 August
- Ishigaki Island (Okinawa): opened 14 March 2026, season into late October
- Kerama Islands / Zamami (Okinawa): opened 18 April 2026, season into late autumn
- Miyako-jima (Okinawa): opened from 21 March 2026, season into November
- Katsurahama Beach (Kochi): no swimming season, swimming is prohibited year-round
Kansai: Awaji Island, Kobe and Wakayama
Suma Beach (Kobe)
Suma is central Kobe's main city beach, a short walk from JR Suma Station and certified with a Blue Flag for water quality and safety. The 2026 supervised season runs 9 July to 23 August, a 46-day period, with swimming hours 9:30 to 17:00. A jellyfish-net "Smile Beach" area is set up in front of the station, and there are showers, lockers and beach houses.
Ohama Beach (Sumoto, Awaji Island)
Ohama is a 750-metre crescent of white sand backed by pines, a short walk from central Sumoto and named one of Japan's 100 best beaches by the Ministry of the Environment. The 2026 season ran 10 July to 31 August, with swimming hours 8:30 to 17:00, and has now closed. Parking is free outside summer but 1,000 yen per visit during the season; barbecues, camping, fireworks and jet skis are prohibited.
Nushima Beach (Nushima Island, Minamiawaji)
Nushima is a small fishing island off the southern tip of Awaji, reached by a 10-minute ferry from Doshima Port. Its quiet swimming beach has a short 2026 season, 18 July to 18 August, with hours 9:30 to 15:00. Changing rooms and cold-water showers are free. Note that part of the swimming area is restricted in 2026 because of nearby construction work, so confirm the situation with Minamiawaji City before you go.
Ama Beach (Aman Kaigan, Minamiawaji)
Ama Beach sits at the southern tip of Awaji and has an almost tropical feel, with palm groves, mural art and AA-grade clear water; on early-summer nights the shallows sometimes glow with sea-fireflies. The 2026 season runs 4 July to 23 August, with supervisors on duty 9:00 to 17:00. Admission is free and so is the parking (about 150 spaces, including the overflow lot). Coaches cannot reach the beach, as the approach road is too narrow. Awaji Island has no railway, so most visitors arrive by car.
Keino Matsubara Beach (Minamiawaji, Awaji Island)
Keino Matsubara is a 2.5-kilometre white-sand beach backed by a black-pine grove on Awaji's west coast, a National Scenic Spot famous for sunsets. The 2026 season runs 11 July to 23 August, with the management office staffed 9:00 to 17:00. Unlike Ama, parking here is charged during the season: 700 yen per car per day, 200 yen for a motorcycle and 2,000 yen for a coach.
Shirahama Beach (Shirarahama, Wakayama)
Nanki-Shirahama has one of the longest mainland seasons in Japan thanks to its mild climate and bright imported white sand. The 2026 season ran 3 May (Golden Week) to 13 September, with swimming hours 8:00 to 17:00. It was the last mainland beach on this page to close.
Hokuriku: Fukui
Zenigahama (Echizen Coast, Fukui)
Zenigahama is a small pebble cove on the Echizen Coast, free to use, with the Kochomon sea arch at one end and a tide-spouting rock on the clifftop above. The 2026 season ran 15 July to 20 August, one of the shorter ones on this page, and it has now closed. The cove is worth the stop out of season too: the arch and the blowhole are the reason most people come, and the blowhole performs best in a winter swell.
Tohoku: Iwate
Jodogahama Beach (Miyako, Iwate)
Jodogahama is a sheltered cove of white rock and clear water on the Sanriku coast. The 2026 season ran 4 July to 30 August, hours 8:30 to 17:00, and has now closed. Supervision was staggered: weekends and holidays only from 4 to 17 July, daily from 18 July to 16 August, then weekends and holidays only from 17 to 30 August. Outside the supervised days, showers and most restrooms are closed.
Okinawa and the Southern Islands
Okinawa's beaches open far earlier and stay open far longer than the mainland, often from March or April into late autumn. These are island groups with many separate beaches, so there is no single island-wide opening or closing date; the dates below are the headline umibiraki ceremonies. Box jellyfish (habu-kurage) are common from roughly June to September, so choose net-protected beaches in summer.
Ishigaki Island
Ishigaki holds one of Japan's earliest beach openings. The 2026 island umibiraki was held on 14 March, and swimming generally runs into late October, with the best conditions from late May to mid-October.
Kerama Islands (Zamami and Tokashiki)
The Kerama Islands are known for "Kerama Blue" water. Zamami Village held its 2026 umibiraki on 18 April at Ama Beach on Zamami, and supervised swimming on the main beaches such as Furuzamami runs through autumn. Tokashiki's per-beach dates and lifeguard days vary, so confirm with each village before visiting.
Miyako-jima
Miyako opens earliest of all. Shigira Beach held its 2026 opening on 21 March, among the earliest in Japan, and the main municipal Miyakojima Umibiraki took place on 5 April at Yonaha Maehama Beach. Swimming generally continues into November. Lifeguard hours are set per beach and per day depending on the weather.
Coasts Without a Swimming Season
Katsurahama Beach (Kochi)
Katsurahama is one of Shikoku's most famous scenic beaches, tied to the samurai Sakamoto Ryoma, but swimming is prohibited year-round. Strong currents and unpredictable waves have caused drownings, and a permanent warning has been in place since 1965. There is no umibiraki and no lifeguards. Enjoy it as a sightseeing spot from the viewpoints rather than a swimming beach.
Chichibugahama (Mitoyo, Kagawa)
A shallow tidal flat rather than a swimming beach. At low tide on a windless evening the film of water left behind turns the sand into a mirror, which is what everyone comes to photograph. Check a tide table before you go, because the effect only works around low tide and near sunset.
Chirihama Nagisa Driveway (Hakui, Ishikawa)
Eight kilometres of sand firm enough to drive a car along, and the only beach in Japan where you can. It is a road as much as a beach, open in fair weather from late spring into autumn and closed when the waves get up. Come for the drive, not for a swim.
Amaharashi Coast (Takaoka, Toyama)
Amaharashi is a viewing coast. The draw is the snow-capped Tateyama Range rising straight out of Toyama Bay behind the water, which is a winter sight rather than a summer one: November to March on a clear day is when it works. If you want to swim here, check locally for the current supervised area and dates.
Before You Go
Dates and hours on this page were last checked on 18 September 2026. They change from year to year, and a beach can close early or restrict its swimming area at short notice for weather (including typhoons), water quality, jellyfish or construction. Always check the beach’s official site before you make the trip.
FAQ
When do beaches open in Japan?
Most mainland beaches open in early July and close in late August. A few, like Shirahama in Wakayama, open as early as May. Okinawa's beaches open from March or April and stay open into late autumn.
Can you swim at a Japanese beach before it officially opens?
You physically can, but there are no lifeguards, the showers and changing rooms are closed, and some beaches actively discourage it. Swimming during the supervised season is much safer.
Why do Okinawa beaches open so much earlier?
Okinawa's subtropical climate keeps the water warm enough to swim from spring. Islands like Miyako and Ishigaki open in March, months ahead of the mainland.
Are there jellyfish at Japanese beaches?
Yes. Follow local warnings and use supervised swimming areas with protective nets where available. For prevention and treatment information, consult Okinawa Prefecture's guidance and seek help from a lifeguard if stung. That guidance is written for Okinawa's box jellyfish (habu-kurage). First aid differs by species, so do not apply habu-kurage treatment to a sting you have not identified: the jellyfish common on mainland coasts in late summer are different animals.
Do these 2026 dates apply every year?
No. Each beach sets new dates and hours every year, and they can change for weather or other reasons. Use this guide for planning and confirm on the official site before you travel.
Where can you still swim in Japan in late September 2026?
Okinawa and the southern islands. Every mainland beach on this page has closed for 2026, the last of them Shirahama in Wakayama on 13 September. Ishigaki runs into late October, Miyako-jima into November and the Kerama Islands through autumn, with supervision set beach by beach.
