Okinoshima weather by month & the best time to visit
🇯🇵 Japan · beach resort · humid subtropical climate
The best time to visit Okinoshima is August — its sunniest month (Sunshine Score 64/100), with October and June close behind. Okinoshima averages about 1,674 hours of sunshine a year. Daytime highs around 27°C / 81°F and roughly 130 mm of rain in August.
Jump to: month-by-month table · sea temperature · nearby alternatives · embed this data
- Sun hours / year
- 1,674
- Sunniest month
- August
- Peak score
- 64/100
- Rain / year
- 1,728 mm
- Midday UV at peak
- 7 (high)
- Sea at warmest
- 29°C / 84°F
- Population
- 204k
- Elevation
- 79 m

When is the best time to visit Okinoshima?
For sunshine, the best time to visit Okinoshima is August, then October and June. The dullest month is January (0/100, 142 mm of rain). The full month-by-month picture is in the table below.
How sunny is Okinoshima?
Okinoshima isn't a sunny place by world standards: about 1,674 hours of sunshine a year. 64 Sunshine Score points separate August (64) from January (0), so the month you pick matters. It ranks #51 of 79 destinations in Japan for annual sunshine, below the national median of 1,773 hours. The year's 1,728 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 | 0 | 8° / 46°F | 6° / 43°F | 142 mm | 1 | 15° / 59°F |
| February | 0 | 8° / 46°F | 6° / 43°F | 111 mm | 2 | 14° / 57°F |
| March | 16 | 11° / 52°F | 8° / 46°F | 122 mm | 4 | 13° / 55°F |
| April | 33 | 14° / 57°F | 11° / 52°F | 117 mm | 5 | 15° / 59°F |
| May | 54 | 18° / 64°F | 15° / 59°F | 130 mm | 6 | 18° / 64°F |
| June | 61 | 21° / 70°F | 19° / 66°F | 159 mm | 6 | 22° / 72°F |
| July | 61 | 25° / 77°F | 23° / 73°F | 205 mm | 7 | 24° / 75°F |
| August | 64 | 27° / 81°F | 25° / 77°F | 130 mm | 7 | 29° / 84°F |
| September | 61 | 24° / 75°F | 23° / 73°F | 206 mm | 6 | 28° / 82°F |
| October | 64 | 20° / 68°F | 18° / 64°F | 131 mm | 4 | 24° / 75°F |
| November | 45 | 16° / 61°F | 13° / 55°F | 114 mm | 2 | 20° / 68°F |
| December | 15 | 11° / 52°F | 8° / 46°F | 161 mm | 1 | 17° / 63°F |
Sea temperature in Okinoshima by month
The sea off Okinoshima is warmest in August at around 29°C / 84°F, and coolest in March at 13°C / 55°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.
See Okinoshima on the interactive sunshine globe →
Nearby places for sunshine
- Yonago Japan · 77 km · best in May · 1,515 h sun/yr
- Izumo Japan · 94 km · best in May · 1,647 h sun/yr
- Tottori Japan · 105 km · best in May · 1,544 h sun/yr
- Okayama Japan · 165 km · best in Aug · 1,914 h sun/yr
- Hiroshima Japan · 197 km · best in Oct · 1,773 h sun/yr
- Takamatsu Japan · 227 km · best in May · 1,982 h sun/yr
Nearest destinations
- Toyooka Japan · 151 km · 1,544 h sun/yr · best in May
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