Subtropical Japan, closer to Taipei than Tokyo — coral reefs, a distinct island culture, and a typhoon season. Daytime highs in Okinawa run from about 18 °C in January to 29 °C in August, an annual range of roughly 11 °C.
On a strict reading, no month in Okinawa clears every threshold for a beach trip. The limits below are absolute, not relative to the region. That does not make it a bad destination; it means the trip has to be planned around a specific constraint rather than a season.
What rules months out here is rainfall and temperature, not any composite judgement. January is the weakest month on these criteria.
Visitor numbers follow their own curve. Recorded overnight stays peak in the two weeks from 13 August at about 1.3 times an average fortnight for this region, against 0.8 times in January. January is the useful case: it is the most consistent month on the weather and still sits at 0.8 times average on occupancy.
What Okinawa is known for
- Shuri Castle was the seat of the Ryukyu Kingdom; it burned in 2019 and is being rebuilt
- Okinawa was one of the original Blue Zones studied for exceptional longevity
- The Churaumi Aquarium holds whale sharks in one of the world's largest tanks
- Kerama and Miyako's reefs have visibility rivalling anywhere in Asia
Month by month
| Month | High °C | Low °C | Precip mm | Wet days |
|---|---|---|---|---|
| January | 18 | 16 | 125 | 14.0 |
| February | 19 | 16 | 101 | 12.5 |
| March | 20 | 18 | 117 | 13.6 |
| April | 22 | 20 | 172 | 14.0 |
| May | 25 | 23 | 236 | 16.4 |
| June | 27 | 25 | 219 | 16.3 |
| July | 29 | 27 | 183 | 14.5 |
| August | 29 | 27 | 177 | 17.5 |
| September | 28 | 26 | 184 | 16.8 |
| October | 26 | 24 | 165 | 14.4 |
| November | 23 | 22 | 123 | 13.6 |
| December | 20 | 18 | 123 | 13.7 |
Ticked rows are months where every hard requirement for a beach trip is met across at least half the month.
Open Okinawa on the map →
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Nearby regions
Figures are 30-year climatology sampled at Naha, Onna, Nago and Itoman, averaged across those locations, from ERA5-Land reanalysis fitted with a harmonic seasonal cycle and a trend term, evaluated for 2026. Sampling named towns rather than averaging the whole region avoids blending valley and mountain conditions into a figure true of neither. Cells are about 0.08° wide, from ERA5-Land's 0.1° grid, which is itself driven by a 0.25° (~28 km) atmospheric reanalysis — so individual valleys, sheltered bays and single summits are not resolved. In steep terrain read these as conditions for the wider area rather than for one village. They describe typical conditions, not a forecast. Read how the climatology is built.