Yeosu weather by month & the best time to visit
South Korea · beach resort · humid subtropical climate
The best time to visit Yeosu is October — its sunniest month (Sunshine Score 78/100), with May close behind. Yeosu averages about 2,024 hours of sunshine a year. Daytime highs around 21°C / 70°F and roughly 67 mm of rain in October.
When is the best time to visit Yeosu?
For sunshine, the best time to visit Yeosu is October, then May. The dullest month is January (0/100, 29 mm of rain). The full month-by-month picture is in the table below.
How sunny is Yeosu?
Yeosu gets a moderate 2,024 hours of sunshine a year. 78 Sunshine Score points separate October (78) from January (0), so the month you pick matters. It ranks #5 of 14 destinations in South Korea for annual sunshine, above the national median of 1,959 hours. Rain has a clear season: the wettest stretch, around July, carries about 51% of the annual 1,407 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 0 | 4° / 39°F | -5° / 23°F | 29 mm | 2 | 5° / 41°F |
| February | 0 | 7° / 45°F | -3° / 27°F | 48 mm | 3 | 7° / 45°F |
| March | 26 | 12° / 54°F | 1° / 34°F | 69 mm | 4 | 10° / 50°F |
| April | 58 | 18° / 64°F | 6° / 43°F | 114 mm | 5 | 16° / 61°F |
| May | 69 | 24° / 75°F | 12° / 54°F | 119 mm | 6 | 21° / 70°F |
| June | 63 | 27° / 81°F | 17° / 63°F | 164 mm | 6 | 25° / 77°F |
| July | 63 | 29° / 84°F | 22° / 72°F | 295 mm | 6 | 28° / 82°F |
| August | 63 | 30° / 86°F | 22° / 72°F | 264 mm | 7 | 31° / 88°F |
| September | 63 | 26° / 79°F | 17° / 63°F | 157 mm | 6 | 30° / 86°F |
| October | 78 | 21° / 70°F | 10° / 50°F | 67 mm | 4 | 22° / 72°F |
| November | 41 | 14° / 57°F | 3° / 37°F | 47 mm | 3 | 16° / 61°F |
| December | 0 | 7° / 45°F | -3° / 27°F | 34 mm | 2 | 9° / 48°F |
Sea temperature in Yeosu by month
The sea off Yeosu is warmest in August at around 31°C / 88°F, and coolest in January at 5°C / 41°F. The water sits at a comfortable 21°C or warmer roughly 6 months a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
Head-to-head
How Yeosu compares month by month: Yeosu vs Busan · Yeosu vs Gwangju · Yeosu vs Ulsan · Yeosu vs Jeju City · all comparisons
Yeosu: questions and answers
What kind of destination is Yeosu?
Yeosu is a beach resort in South Korea with a humid subtropical climate — the sea reaches 31°C at its warmest and is swimmable (21°C+) about 6 months a year.
How many hours of sunshine does Yeosu get a year?
Yeosu gets about 2,024 hours of sunshine a year, at its best around October.
When is the best time to visit Yeosu?
The sunniest time to visit Yeosu is October, when the Sunshine Score peaks at 78/100 (with May close behind). Expect daytime highs around 21°C / 70°F.
What is the least sunny month in Yeosu?
January is the least sunny month in Yeosu, scoring 0/100 with about 29 mm of rain.
What is the sea temperature in Yeosu?
The sea in Yeosu ranges from about 5°C (January) to 31°C (August). Month-by-month sea temperatures are on this page.
How strong is the sun in Yeosu?
The typical midday UV index in Yeosu peaks around 7 (high) in August, easing to about 2 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
Put the Yeosu sunshine badge on your site
A compact badge showing Yeosu's sunshine at a glance — free to embed under CC BY 4.0. Paste this wherever you'd like it to appear:
Live preview — this is exactly what your readers see: