Busan weather by month & the best time to visit
South Korea · major coastal city · humid subtropical climate
The best time to visit Busan is October — its sunniest month (Sunshine Score 77/100). Busan averages about 2,112 hours of sunshine a year. Daytime highs around 21°C / 70°F and roughly 75 mm of rain in October.
When is the best time to visit Busan?
For sunshine, the best time to visit Busan is October. The dullest month is January (0/100, 30 mm of rain). The full month-by-month picture is in the table below.
How sunny is Busan?
Busan gets a moderate 2,112 hours of sunshine a year. 77 Sunshine Score points separate October (77) from January (0), so the month you pick matters. Busan is the sunniest of the 14 destinations tracked in South Korea. Rain has a clear season: the wettest stretch, around August, carries about 48% of the annual 1,490 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 0 | 6° / 43°F | -1° / 30°F | 30 mm | 2 | 10° / 50°F |
| February | 0 | 8° / 46°F | 1° / 34°F | 52 mm | 3 | 11° / 52°F |
| March | 26 | 12° / 54°F | 4° / 39°F | 79 mm | 4 | 11° / 52°F |
| April | 49 | 17° / 63°F | 9° / 48°F | 137 mm | 5 | 16° / 61°F |
| May | 65 | 21° / 70°F | 14° / 57°F | 144 mm | 6 | 19° / 66°F |
| June | 64 | 24° / 75°F | 18° / 64°F | 175 mm | 6 | 23° / 73°F |
| July | 64 | 27° / 81°F | 22° / 72°F | 299 mm | 6 | 24° / 75°F |
| August | 64 | 28° / 82°F | 24° / 75°F | 244 mm | 6 | 29° / 84°F |
| September | 64 | 25° / 77°F | 20° / 68°F | 176 mm | 5 | 29° / 84°F |
| October | 77 | 21° / 70°F | 14° / 57°F | 75 mm | 4 | 22° / 72°F |
| November | 48 | 15° / 59°F | 8° / 46°F | 46 mm | 2 | 17° / 63°F |
| December | 0 | 8° / 46°F | 1° / 34°F | 33 mm | 2 | 11° / 52°F |
Sea temperature in Busan by month
The sea off Busan is warmest in August at around 29°C / 84°F, and coolest in January at 10°C / 50°F. The water sits at a comfortable 21°C or warmer roughly 5 months a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
Head-to-head
How Busan compares month by month: Busan vs Daegu · Busan vs Ulsan · Busan vs Yeosu · all comparisons
Busan: questions and answers
What kind of destination is Busan?
Busan is a major coastal city in South Korea with a humid subtropical climate — the sea reaches 29°C at its warmest and is swimmable (21°C+) about 5 months a year.
How many hours of sunshine does Busan get a year?
Busan gets about 2,112 hours of sunshine a year, at its best around October.
When is the best time to visit Busan?
The sunniest time to visit Busan is October, when the Sunshine Score peaks at 77/100. Expect daytime highs around 21°C / 70°F.
What is the least sunny month in Busan?
January is the least sunny month in Busan, scoring 0/100 with about 30 mm of rain.
Is Busan the sunniest place in South Korea?
Yes — with about 2,112 hours of sunshine a year, Busan has the most annual sunshine of the 14 South Korea destinations tracked by Sunshine Atlas.
What is the sea temperature in Busan?
The sea in Busan ranges from about 10°C (January) to 29°C (August). Month-by-month sea temperatures are on this page.
How strong is the sun in Busan?
The typical midday UV index in Busan peaks around 6 (high) in May, easing to about 2 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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