Busan Weather in September: What to Expect
In September, Busan averages highs of 25.3°C and lows of 19.3°C, with about 13 rainy days (~262 mm). Verdict: Wet season — plan around rain — ~13 rainy days this month. That makes it the 3rd hottest of South Korea's 6 main cities this month.
Busan vs other South Korea cities in September
South Korea is not one climate. In September, Jeju runs to 25.6°C while Sokcho sits at 23.3°C — a 2°C spread. Here is where Busan falls:
What to pack for Busan in September
With highs near 25.3°C and lows around 19.3°C, pack light summer clothing plus a thin layer for evenings, a compact umbrella or rain shell.
Busan is on the coast — add swimwear; the water can feel cool for swimming this month.
What to do in Busan in September
With 25.3°C midday highs, start outdoor sights early and keep afternoons for shaded or indoor stops. Top sights:
Public holidays in South Korea, September
- 2026-09-24 — Chuseok
- 2026-09-25 — Chuseok
- 2026-09-26 — Chuseok
- 2027-09-14 — Chuseok
- 2027-09-15 — Chuseok
- 2027-09-16 — Chuseok
Busan in September — FAQs
What is the weather like in Busan in September?
In September, Busan averages daytime highs of 25.3°C and overnight lows around 19.3°C, with roughly 13 rainy days and about 262 mm of rain across the month. Wet season — plan around rain — ~13 rainy days this month.
Is September a good time to visit Busan?
Wet season — plan around rain. Plan outdoor sights for early morning and keep midday for indoor or shaded activities. Among South Korea's cities, Busan is the 3rd hottest this month.
What should I pack for Busan in September?
For September (19.3–25.3°C), pack light summer clothing plus a thin layer for evenings, a compact umbrella or rain shell.
What is there to do in Busan in September?
Busan's main sights include Busan, Gaya Tumuli, Busan Al-Fatah Mosque. Time outdoor sites for early morning given the midday heat.
Are there public holidays in South Korea in September?
Yes — Chuseok (2026-09-24), Chuseok (2026-09-25), Chuseok (2026-09-26), Chuseok (2027-09-14), Chuseok (2027-09-15), Chuseok (2027-09-16). Sites can be busier or closed around these dates.
Busan weather by month: