Jeju has 2 festivals in August: Jeju Biennale (25 Aug – 15 Nov 2026) and Iho Tewoo Festival (expected Jul/Aug 2027). The Jeju Biennale (제주비엔날레) is Jeju Island's contemporary art biennale, run by Jeju Museum of Art.
Typical August weather in Jeju City: average high 30 °C (86 °F), low 25 °C (77 °F), 272 mm of rain (Jeju City station, KMA 1991–2020 normals).
| Festival | Dates | Admission | Nearest station | Status |
|---|---|---|---|---|
| Jeju Biennale제주비엔날레 | 25 Aug – 15 Nov 2026 | From ₩8,000 | See festival page | Happening now |
| Iho Tewoo Festival이호테우축제 | Expected Jul/Aug 2027 | Free + paid activities | See festival page | Expected |
Dates marked “expected” follow the organizer's usual pattern and are replaced when the official announcement comes. Each festival page lists the sources.
| Festival town | Average high | Average low | Rain | Measured at |
|---|---|---|---|---|
| Jeju City | 30 °C 86 °F | 25 °C 77 °F | 272 mm | Jeju City |
What to wear. Hot, humid and the wettest time of year: light clothes, a rain jacket or umbrella, and water.
Monthly averages, not a forecast. Source: Korea Meteorological Administration climate normals, 1991–2020, via the KMA-sourced climate tables for Jeju City. Where a festival town has no station with published normals, the nearest one is used and its distance shown.
The Jeju Biennale (제주비엔날레) is Jeju Island's contemporary art biennale, run by Jeju Museum of Art. The 5th edition, 'Iyahong: The Art of Metamorphosis', runs 25 August–15 November 2026 with 69 artists and teams at Jeju Museum of Art on the 1100 Road, the Obaekjanggun Gallery in Jeju Stone Park and three galleries in Jeju City's old town; in October and November the venues open 10:00–18:00.
Iho Tewoo Festival is a three-day summer beach festival at Iho Tewoo Beach on the west coast of Jeju City, near the airport. The 21st edition ran 31 July–2 August 2026 with a traditional tewoo raft launching, an anchovy-fishing re-enactment, a haenyeo torch parade, fireworks and raft-rowing races.
The mud festival, Pentaport, Hwacheon's tomato festival and Jangheung's water festival all run into early August, and the Busan Sea Festival puts fireworks, a beach pub and free concerts on Dadaepo Beach between late July and mid-August. Around 14 August, the anniversary of Admiral Yi Sun-sin's 1592 victory off Hansan Island, Tongyeong stages the Hansan Daecheop Festival with a naval procession, a battle re-enactment on the water and fireworks over the sea. Jecheon's music-and-film festival plans to open in August in 2027, and in the last week of the month Yeongdong holds its grape festival, with grape stomping and picking. Muju's firefly festival, with guided night walks to see fireflies in a protected habitat, follows in early September. Typhoon season peaks in late August and September; organizers post cancellations on the morning of the event.
Tip. Firefly viewing tours at Muju are ticketed and limited; book the moment sales open.
Jeju has 2 festivals in August: Jeju Biennale (25 Aug – 15 Nov 2026) and Iho Tewoo Festival (expected Jul/Aug 2027). The Jeju Biennale (제주비엔날레) is Jeju Island's contemporary art biennale, run by Jeju Museum of Art.
25 Aug – 15 Nov 2026. Happening now. From ₩8,000. Nearest station: See festival page. Dates are taken from the organizer's own notice.
Expected Jul/Aug 2027. Expected. Free + paid activities. Nearest station: See festival page. The organizer has not yet confirmed the dates; this page updates when they do.
Average high 30 °C (86 °F), low 25 °C (77 °F), 272 mm of rain (Jeju City station, KMA 1991–2020 normals). Hot, humid and the wettest time of year: light clothes, a rain jacket or umbrella, and water.
Fly Gimpo–Jeju in about an hour; Jeju has no trains, so plan on buses or taxis.
18 festivals across Korea fall in August, including Boryeong Mud Festival, Busan Sea Festival, Goheung Nokdong Port Drone Show. Firefly viewing tours at Muju are ticketed and limited; book the moment sales open.