Naha, Okinawa weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Good
Best time to visit: May – October
What is the weather like in Naha, Okinawa in September?
In September, Naha, Okinawa is hot: daytime highs average 29 °C, and even at night it stays warm at around 27 °C. The sea averages 28.6 °C – lovely and warm for swimming. Expect around 6 hours of sunshine a day. It rains often – on about 15 days, adding up to 202 mm. The air is often humid and muggy. It is often windy, with gusts of around 30 km/h. All in all, September is a good month for a holiday in Naha, Okinawa.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 76 | 74 | 77 |
| Day | 29° | 29° | 27° |
| Night | 27° | 27° | 25° |
| Sea | 29° | 29° | 27° |
| Sun | 7 h | 6 h | 5 h |
| Rain days | 15 | 15 | 12 |
More details for September
- Daylight
- 12 h 21 min06:14 – 18:35
- UV index
- 10 · very highclear sky, noon (estimate)All months
- Muggy days
- 29 daysdew point 18 °C or more
- Wind
- 30 km/haverage daily peak
- Cloud cover
- 54 %on average
- Hot days
- 2 days30 °C or more
- Time zone
- UTC+9Asia/Tokyo
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %100 %
- Sunshineweight 20 %50 %
- Few rainy daysweight 20 %21 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in September
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
- Windproof jacket
Naha, Okinawa in September: quick answers
Is Naha, Okinawa hot in September?
Yes. In September, Naha, Okinawa is hot: daytime highs average 29 °C and nights stay around 27 °C. On about 2 days the thermometer climbs to 30 °C or more.
Can you swim in Naha, Okinawa in September?
Yes. In September the sea averages 28.6 °C – lovely and warm for swimming.
Does it rain much in Naha, Okinawa in September?
It rains often – on about 15 days, adding up to 202 mm.
Naha, Okinawa month by month
The whole year in Naha, OkinawaAll destinations: JapanWhere to go in SeptemberSea temperature in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0)