The month in detail
What to expect in September
Autumn in Busan is often underrated: 26°C, golden light and declining crowds. An interesting window. Expect rain on 34% of days — a light raincoat in the bag is recommended. A good balance between weather and crowds, even if May (8.1/10) remains theoretically better.
September ranks 3 out of 12 months in Busan. Compared to August: −4°C daytime, −0.6h of sun per day.
This month's conditions
What it's like in September
UV index
6 · moderate
protect during midday hours
Feels like
muggy at times
18°
Sea
27°C
warm, ideal
Daylight
12.2h of daylight
Air quality
good
AQI 31
Compare
Is September the right month?
The best month in Busan is May (8.1/10), 0.2 pt higher than September.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · Busan
Expedia →
Activities
Tours, tickets, experiences
See ↓
Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · Busan
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a beach holiday.
Country · South Korea
🗣️LanguageKorean
💶CurrencySouth Korean Won (₩)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘModerate · 3/5
🌡️ Climate
🌍Climate typeTemperate oceanic
📈Climate trend ⓘStable
🔥Hottest monthAugust · 30°C
❄️Coolest monthJanuary · 7°C
🌧️Rainiest month ⓘJuly · 39%
🏖️ Beach holiday
📅Peak seasonJuin → Sept
🏖️Swell (Sept–Mar) ⓘModérée
Explore
Other destinations in September
If September doesn't convince you for this destination, compare with others.
Location
Where is Busan ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
South KoreaTemperate oceanic climate with a 8.1 → 4.3 gap between best and worst month. 10 years of ERA5 data to choose by project.
35.18°N · 129.08°E
Questions
Frequently asked questions
What is the best time to visit Busan?
May is the best month with 22.0°C highs, 13.0°C lows, 7.4h of sunshine and 22.0% rainy days. The months of May & June offer comparable conditions.
How many hours of sunshine does Busan get in May?
Busan averages 7.4 sunshine hours per day in May. It is the sunniest month with a climate score of 7.5/10.
What is the rainiest month in Busan?
January is the most unfavourable month with January has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Busan in May?
In May, overnight lows reach 13.0°C, while afternoon highs average 22.0°C.
Is Busan good in winter?
In winter (December-February), Busan scores 4.1/10 on average — Difficult period — prefer the peak season.. The best month overall remains May with a score of 7.5/10.
When should you avoid Busan?
January is the most difficult month to visit Busan, with January has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in Busan in September?
In September, the sea averages 27°C in Busan: warm, ideal. Ideal conditions for swimming and snorkeling.
Do you need sun protection in Busan in September?
The average UV index reaches 6 in September in Busan (moderate), with about 12.2h of daylight. Protect during midday hours.