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.
September in Busan offers pleasant warmth, averaging 25°C during the day and a comfortable 19°C at night, making it the second warmest city in South Korea this month. Expect around 13 rainy days, so pack an umbrella. Mornings and evenings are ideal for exploring coastal areas and sights like Gaya Tumuli or Busan Al-Fatah Mosque, as the midday sun can be quite strong. Wear light, breathable clothing and comfortable walking shoes.
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: