Jeju has 2 festivals in September: Jeju Biennale (25 Aug – 15 Nov 2026) and Seogwipo Chilsimni Festival (expected Sep/Oct 2027). The Jeju Biennale (제주비엔날레) is Jeju Island's contemporary art biennale, run by Jeju Museum of Art.
Typical September weather in Jeju City: average high 26 °C (79 °F), low 21 °C (70 °F), 228 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 |
| Seogwipo Chilsimni Festival서귀포칠십리축제 | Expected Sep/Oct 2027 | Free entry | 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 | 26 °C 79 °F | 21 °C 70 °F | 228 mm | Jeju City |
What to wear. Rainy: a rain jacket or umbrella and shoes that can get wet.
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.
The Seogwipo Chilsimni Festival is Seogwipo's own civic festival, held on the car park beside Cheonjiyeon Falls and in the old town on Jeju's south coast. The 32nd edition runs Friday 23 to Sunday 25 October 2026, 10:00–22:00 according to KTO, and entry is free.
September starts in the mountains: Muju's firefly festival takes visitors on guided night walks to see fireflies in a protected habitat in the first half of the month, and Bongpyeong in Pyeongchang holds the Hyoseok Culture Festival among white buckwheat fields for ten days. Hanwha's Seoul International Fireworks Festival over the Han River falls on a Saturday between early September and mid-October. In odd-numbered years the Cheongju Craft Biennale opens in early September (2 September–31 October in 2027), and in even-numbered years Gyeonggi's ceramics biennale opens in Icheon, Gwangju and Yeoju. Namdang Port in Hongseong sells king prawns from late August or early September into October or November. The main autumn season starts late in the month: Andong's mask-dance festival, the Baekje cultural festival in Gongju and Buyeo, Cheonan's world dance festival, Geumsan's ginseng festival, the Jeongseon Arirang Festival and Suwon's Hwaseong fortress festival all open between the third week of September and the first week of October, and several overlap the Chuseok holiday.
Tip. Chuseok (the harvest holiday) moves each year; festivals that overlap it are busier, and intercity transport sells out.
Jeju has 2 festivals in September: Jeju Biennale (25 Aug – 15 Nov 2026) and Seogwipo Chilsimni Festival (expected Sep/Oct 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 Sep/Oct 2027. Expected. Free entry. Nearest station: See festival page. The organizer has not yet confirmed the dates; this page updates when they do.
Average high 26 °C (79 °F), low 21 °C (70 °F), 228 mm of rain (Jeju City station, KMA 1991–2020 normals). Rainy: a rain jacket or umbrella and shoes that can get wet.
Fly Gimpo–Jeju in about an hour; Jeju has no trains, so plan on buses or taxis.
39 festivals across Korea fall in September, including Andong Maskdance Festival, Baekje Cultural Festival, Busan International Film Festival. Chuseok (the harvest holiday) moves each year; festivals that overlap it are busier, and intercity transport sells out.