Japan
Okinawa in September: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Okinawa in September is climatically well suited to beach holidays. The average daily high is around 29 °C, and the sea is about 28 °C. With about 17 rainy days it is very wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
62/100 · #10
Warmth
#3
Dryness
#9
Sun
#4
Sea warmth
#3
Published best categories: none
Okinawa · SeptemberPhoto: Kugel~commonswiki · CC BY-SA 4.0Climate facts
- Average high
- 29 °C
- Average low
- 28 °C
- Sea
- 28 °C
- Rainy days (est.)
- 17 rainy days (est.)
- Sun (est.)
- 6 h/day
- Humidity
- 80 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| August | 29 | 28 | 19 | 178 | 7.4 | 82 | 5.1 | 29 | 58 |
| September (selected) | 29 | 28 | 17 | 176 | 6.4 | 80 | 5.3 | 28 | 62 |
| October | 27 | 26 | 14 | 125 | 5.1 | 78 | 6.1 | 27 | 73 |
How do the previous and next months compare?
Baseline: September (62/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| August | -4 | +0.6 °C | +0.8 °C | +1.6 | +1.8 mm | +1 h | +2 % | -0.3 m/s | +0.5 °C |
| October | +11 | -1.9 °C | -2 °C | -3.4 | -51 mm | -1.3 h | -2.7 % | +0.7 m/s | -1.2 °C |
All twelve months in context
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Where to stay in Okinawa
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Useful next decisions
Frequently asked questions
How warm is Okinawa in September?
The average daily high is around 29 °C, with an average daily low of about 28 °C.
Can you swim in Okinawa in September?
The sea is about 28 °C (very warm).
Does it rain a lot in Okinawa in September?
The curated estimate is about 17 rainy days per month, not a directly measured long-term average. Total precipitation averages around 176 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Okinawa?
By the climate score, April, October, November and December are the strongest months for Okinawa. For a beach trip: May, June, October and November. September is not among them.