Tsushima weather by month & the best time to visit
Japan · beach resort · humid subtropical climate
The best time to visit Tsushima is October — its sunniest month (Sunshine Score 73/100). Tsushima averages about 1,900 hours of sunshine a year. Daytime highs around 21°C / 70°F and roughly 91 mm of rain in October.
When is the best time to visit Tsushima?
For sunshine, the best time to visit Tsushima is October. The dullest month is January (0/100, 52 mm of rain). The full month-by-month picture is in the table below.
How sunny is Tsushima?
Tsushima gets a moderate 1,900 hours of sunshine a year. 73 Sunshine Score points separate October (73) from January (0), so the month you pick matters. It ranks #14 of 79 destinations in Japan for annual sunshine, above the national median of 1,773 hours. Rain has a clear season: the wettest stretch, around July, carries about 44% of the annual 1,759 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 0 | 8° / 46°F | 5° / 41°F | 52 mm | 2 | 17° / 63°F |
| February | 13 | 10° / 50°F | 6° / 43°F | 73 mm | 3 | 16° / 61°F |
| March | 23 | 12° / 54°F | 9° / 48°F | 109 mm | 4 | 16° / 61°F |
| April | 36 | 15° / 59°F | 12° / 54°F | 157 mm | 5 | 17° / 63°F |
| May | 57 | 19° / 66°F | 16° / 61°F | 176 mm | 6 | 19° / 66°F |
| June | 62 | 22° / 72°F | 20° / 68°F | 221 mm | 6 | 23° / 73°F |
| July | 62 | 25° / 77°F | 24° / 75°F | 312 mm | 7 | 25° / 77°F |
| August | 62 | 28° / 82°F | 26° / 79°F | 233 mm | 7 | 30° / 86°F |
| September | 62 | 25° / 77°F | 23° / 73°F | 209 mm | 6 | 29° / 84°F |
| October | 73 | 21° / 70°F | 19° / 66°F | 91 mm | 4 | 25° / 77°F |
| November | 51 | 16° / 61°F | 13° / 55°F | 71 mm | 3 | 23° / 73°F |
| December | 20 | 11° / 52°F | 7° / 45°F | 55 mm | 2 | 19° / 66°F |
Sea temperature in Tsushima by month
The sea off Tsushima is warmest in August at around 30°C / 86°F, and coolest in February at 16°C / 61°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
Tsushima: questions and answers
What kind of destination is Tsushima?
Tsushima is a beach resort in Japan with a humid subtropical climate — the sea reaches 30°C at its warmest and is swimmable (21°C+) about 6 months a year.
How many hours of sunshine does Tsushima get a year?
Tsushima gets about 1,900 hours of sunshine a year, at its best around October.
When is the best time to visit Tsushima?
The sunniest time to visit Tsushima is October, when the Sunshine Score peaks at 73/100. Expect daytime highs around 21°C / 70°F.
What is the least sunny month in Tsushima?
January is the least sunny month in Tsushima, scoring 0/100 with about 52 mm of rain.
What is the sea temperature in Tsushima?
The sea in Tsushima ranges from about 16°C (February) to 30°C (August). Month-by-month sea temperatures are on this page.
How strong is the sun in Tsushima?
The typical midday UV index in Tsushima peaks around 7 (high) in July, 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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