OkinawaPhoto: Kugel~commonswiki · CC BY-SA 4.0Japan · Asia
Best time to visit Okinawa
Okinawa is subtropical and much milder than mainland Japan. The sea is swimmable from May to October.
Climate decision
Best travel months for Okinawa
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Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Latest 5-year values 2021–2025
Average of the five most recent complete years compared with the 1991–2025 climate average.
May · Wet days
21.6 days/month
1991–2025: 18.7 days/month
+2.9 days/month · higher
October · Mean daily maximum
28 °C
1991–2025: 26.9 °C
+1.1 °C · higher
September · Monthly precipitation
115 mm/month
1991–2025: 176.3 mm/month
-61.3 mm/month · lower
September · Sea temperature
29.3 °C
1991–2025: 28.5 °C
+0.8 °C · higher
July: 43/155 days at or above 30 °C; highest single value 31.3 °C.
Five-year historical sample, not a weather forecast or long-term climate trend. Individual hot days can be far above the monthly mean.
Annual profile · Coast and sea
Okinawa: the swimming season follows two curves
Average daily highs vary by 9.6 °C through the year, while the sea varies by 7.2 °C. Air and water temperature should therefore be considered separately.
The practical difference
The month with the highest daytime temperature and the month with the warmest sea need not define the same travel window. Rain and sunshine help resolve the trade-off.
Warmest sea
August · 29 °C
Highest average daily high
July and August · 29.4 °C
Fewest rainy days
February · 11.1
Most sunshine
July · 7.9 h
Month by month
Overall suitability per month. Tap a month for details.
All climate figures compared
The table is the complete accessible data view; the charts below highlight selected patterns.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Rain mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| January | 20 | 18 | 13 | 64 | 3.0 | 75 | 6.3 | 23 | 65 |
| February | 20 | 18 | 11 | 60 | 3.7 | 77 | 6.1 | 22 | 68 |
| March | 21 | 19 | 15 | 92 | 4.6 | 78 | 5.7 | 22 | 66 |
| April | 23 | 21 | 16 | 129 | 5.5 | 81 | 5.3 | 23 | 71 |
| May | 25 | 24 | 19 | 215 | 6.0 | 84 | 4.8 | 25 | 70 |
| June | 27 | 26 | 21 | 277 | 6.7 | 88 | 5.0 | 27 | 64 |
| July | 29 | 28 | 16 | 136 | 7.9 | 84 | 5.1 | 29 | 61 |
| August | 29 | 28 | 19 | 178 | 7.4 | 82 | 5.1 | 29 | 58 |
| September | 29 | 28 | 17 | 176 | 6.4 | 80 | 5.3 | 28 | 62 |
| October | 27 | 26 | 14 | 125 | 5.1 | 78 | 6.1 | 27 | 73 |
| November | 24 | 23 | 13 | 86 | 3.7 | 76 | 6.3 | 26 | 76 |
| December | 21 | 20 | 13 | 66 | 3.0 | 75 | 6.5 | 24 | 72 |
Climate through the year
Compare temperature, rainy days, sunshine and, for coastal destinations, sea temperature month by month.
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Where to stay in Okinawa
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The number is the overall climate score, not a similarity score.
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Frequently asked questions
When is the best time to visit Okinawa?
The strongest climate months are April, October, November, December. Values are historical averages, not a forecast.
Which month has the highest average daily maximum temperature in Okinawa?
Average daily maximum temperatures in Okinawa are practically tied in July and August at around 29 °C.
When is the sea warmest at Okinawa?
In August, at around 29 °C.