Jeju Weather in August: What to Expect
In August, Jeju averages highs of 29.6°C and lows of 25.2°C, with about 17 rainy days (~233 mm). Verdict: Wet season — plan around rain — ~17 rainy days this month. That makes it the 2nd hottest of South Korea's 6 main cities this month.
Jeju vs other South Korea cities in August
South Korea is not one climate. In August, Gyeongju runs to 30.4°C while Sokcho sits at 27.6°C — a 3°C spread. Here is where Jeju falls:
What to pack for Jeju in August
With highs near 29.6°C and lows around 25.2°C, pack light summer clothing plus a thin layer for evenings, a compact umbrella or rain shell.
Jeju is on the coast — add swimwear; sea conditions are pleasant for swimming this month.
What to do in Jeju in August
With 29.6°C midday highs, start outdoor sights early and keep afternoons for shaded or indoor stops. Top sights:
Public holidays in South Korea, August
- 2026-08-17 — Liberation Day
- 2027-08-16 — Liberation Day
Jeju in August — FAQs
What is the weather like in Jeju in August?
In August, Jeju averages daytime highs of 29.6°C and overnight lows around 25.2°C, with roughly 17 rainy days and about 233 mm of rain across the month. Wet season — plan around rain — ~17 rainy days this month.
Is August a good time to visit Jeju?
Wet season — plan around rain. Plan outdoor sights for early morning and keep midday for indoor or shaded activities. Among South Korea's cities, Jeju is the 2nd hottest this month.
What should I pack for Jeju in August?
For August (25.2–29.6°C), pack light summer clothing plus a thin layer for evenings, a compact umbrella or rain shell.
What is there to do in Jeju in August?
Jeju's main sights include Jeju Volcanic Island and Lava Tubes, Hallasan National Park, Dadohaehaesang National Park. Time outdoor sites for early morning given the midday heat.
Are there public holidays in South Korea in August?
Yes — Liberation Day (2026-08-17), Liberation Day (2027-08-16). Sites can be busier or closed around these dates.
Jeju weather by month: