Weather in Okinawa Prefecture, Japan in September

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Visiting Okinawa Prefecture, Japan in September

September is one of the best months to visit Okinawa Prefecture for the best beach weather. It has the most sunshine and best sunbathing and swimming conditions of the year.

September has average maximum temperatures of 30°C (86°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 53.3% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 6.6 hours of sunshine per day. September has total rainfall of 2cm (0.8inches) making it mostly dry but with short lived occasional showers. There are only 14.5 days with some rainfall so you can still enjoy the beach on the majority of days. Sea temperatures are a very warm 29°C (83°F). September is an excellent month for swimming in Okinawa Prefecture with very comfortable temperatures for bathing all day.

Also consider visiting Okinawa Prefecture in one of the other best months of July, August, October, for the best beach weather.

Also consider one of our other suggestions for September.

Can you sunbathe in Okinawa Prefecture in September?

Yes, September is a good time for sunbathing in Okinawa Prefecture.

September has average maximum temperatures of 30°C (86°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 53.3% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 6.6 hours of sunshine per day. September has total rainfall of 2cm (0.8inches) making it mostly dry but with short lived occasional showers. There are only 14.5 days with some rainfall so you can still enjoy the beach on the majority of days.

More about September temperature and sunshine.

Can you swim in Okinawa Prefecture in September?

Yes, September is an excellent month for swimming in Okinawa Prefecture with very warm sea temperatures 29°C (83°F).

More about September sea temperatures.

Is September a good time to holiday in Okinawa Prefecture?

Yes, September is a good time for a holiday in Okinawa Prefecture.

September has average maximum temperatures of 30°C (86°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 53.3% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 6.6 hours of sunshine per day. September has total rainfall of 2cm (0.8inches) making it mostly dry but with short lived occasional showers. There are only 14.5 days with some rainfall so you can still enjoy the beach on the majority of days. Sea temperatures are a very warm 29°C (83°F). September is an excellent month for swimming in Okinawa Prefecture with very comfortable temperatures for bathing all day.

More about the September temperatures and sunshine.

Is Okinawa Prefecture warm in September?

Yes, Okinawa Prefecture is very warm and perfect for sunbathing on clear days in September.

The average maximum temperature in Okinawa Prefecture in September is 30°C (86°F). The average maximum temperature is 31°C (88°) in the previous month and 27°C (81°F) in the next month.

The average temperature in Okinawa Prefecture in September is 28°C (82°F). The average temperature is 29°C (84°F) in the previous month and 25°C (77°F) in the next month.

More info about the September temperatures and sunshine.

How sunny is Okinawa Prefecture in September?

The average day light hours per day in Okinawa Prefecture in September are 12.3. The sunshine percentage is 53.3% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 6.6 hours of sunshine per day.

More about September sunshine.

Temperature in Okinawa Prefecture in September

The average maximum temperature in Okinawa Prefecture in September is 30°C (86°F). The average maximum temperature is 31°C (88°F) in the previous month and 27°C (81°F) in the next month.

The average temperature in Okinawa Prefecture in September is 28°C (82°F). The average temperature is 29°C (84°F) in the previous month and 25°C (77°F) in the next month.

The average minimum temperature in Okinawa Prefecture in September is 25°C (78°F). The minimum temperature is 27°C (80°F) in the previous month and 23°C (73°F) in the next month.

Sunshine in Okinawa Prefecture in September

During September the average day light hours are 12.3 per day in Okinawa Prefecture. The sunshine percentage is 53.3% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 6.6 hours of sunshine per day.

The ultraviolet index in Okinawa Prefecture in September is typically 10.7 during September. An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in Okinawa Prefecture in September

The average sea water temperature in Okinawa Prefecture in September is 28.5°C (83.3°F) which is very warm and ideal for relaxing and swimming for the whole day.

Rainfall in Okinawa Prefecture in September

The average total rainfall in Okinawa Prefecture in September is 2cm (0.8inches) and on average there are 14.5 rainy days in September making it a pretty wet time to visit the beach.

Humidity in Okinawa Prefecture in September

The maximum dew point (an indicator of humidity) in Okinawa Prefecture in September is 24°C (75°F) which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning. The dew point is 26°C (78°F) in the previous month and 21°C (21°F) in the next month.

The average maximum relative humidity in Okinawa Prefecture in September is typically 87.3%. The maximum relative humidity is 89% in the previous month and 82.8% in the next month.

The average relative humidity in Okinawa Prefecture in September is typically 75.6%. The average relative humidity is 78% in the previous month and 71.5% in the next month.

Wind Speed in Okinawa Prefecture in September

The average maximum wind speed in Okinawa Prefecture in September is typically 26KM/H (16MPH). The average maximum wind speed is 26KM/H (16MPH) in the previous month and 29KM/H (18MPH) in the next month.

The average wind speed in Okinawa Prefecture in September is typically 18KM/H (11MPH). The average wind speed is 18KM/H (11MPH) in the previous month and 21KM/H (13MPH) in the next month.

The average wind direction in Okinawa Prefecture in September is from the East.

Monthly Averages

Suggested Beaches in September

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