Shirahama weather by month & the best time to visit
Japan · beach resort · humid subtropical climate
The best time to visit Shirahama is November — its sunniest month (Sunshine Score 64/100), with May and June close behind. Shirahama averages about 1,967 hours of sunshine a year. Daytime highs around 19°C / 66°F and roughly 113 mm of rain in November.
When is the best time to visit Shirahama?
For sunshine, the best time to visit Shirahama is November, then May and June. The dullest month is January (19/100, 70 mm of rain). The full month-by-month picture is in the table below.
How sunny is Shirahama?
Shirahama gets a moderate 1,967 hours of sunshine a year. 45 Sunshine Score points separate November (64) from January (19), so the month you pick matters. It ranks #8 of 79 destinations in Japan for annual sunshine, above the national median of 1,773 hours. The year's 1,966 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 19 | 11° / 52°F | 6° / 43°F | 70 mm | 2 | 17° / 63°F |
| February | 24 | 12° / 54°F | 7° / 45°F | 92 mm | 3 | 17° / 63°F |
| March | 39 | 15° / 59°F | 9° / 48°F | 125 mm | 5 | 17° / 63°F |
| April | 57 | 19° / 66°F | 13° / 55°F | 154 mm | 6 | 18° / 64°F |
| May | 63 | 22° / 72°F | 18° / 64°F | 169 mm | 7 | 19° / 66°F |
| June | 63 | 25° / 77°F | 21° / 70°F | 241 mm | 6 | 23° / 73°F |
| July | 63 | 28° / 82°F | 25° / 77°F | 235 mm | 8 | 26° / 79°F |
| August | 63 | 29° / 84°F | 26° / 79°F | 198 mm | 8 | 29° / 84°F |
| September | 63 | 27° / 81°F | 24° / 75°F | 259 mm | 7 | 28° / 82°F |
| October | 63 | 23° / 73°F | 19° / 66°F | 226 mm | 5 | 26° / 79°F |
| November | 64 | 19° / 66°F | 14° / 57°F | 113 mm | 3 | 23° / 73°F |
| December | 31 | 13° / 55°F | 8° / 46°F | 84 mm | 2 | 19° / 66°F |
Sea temperature in Shirahama by month
The sea off Shirahama is warmest in August at around 29°C / 84°F, and coolest in January at 17°C / 63°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.
Shirahama: questions and answers
What kind of destination is Shirahama?
Shirahama is a beach resort in Japan with a humid subtropical climate — the sea reaches 29°C at its warmest and is swimmable (21°C+) about 6 months a year.
How many hours of sunshine does Shirahama get a year?
Shirahama gets about 1,967 hours of sunshine a year, at its best around November.
When is the best time to visit Shirahama?
The sunniest time to visit Shirahama is November, when the Sunshine Score peaks at 64/100 (with May and June close behind). Expect daytime highs around 19°C / 66°F.
What is the least sunny month in Shirahama?
January is the least sunny month in Shirahama, scoring 19/100 with about 70 mm of rain.
What is the sea temperature in Shirahama?
The sea in Shirahama ranges from about 17°C (January) to 29°C (August). Month-by-month sea temperatures are on this page.
How strong is the sun in Shirahama?
The typical midday UV index in Shirahama peaks around 8 (very 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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