Annual average weather for Okinawa Prefecture, Japan

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Annual Average Weather for Okinawa Prefecture, Japan

The annual average maximum daily temperature is 24.9°C (76.8°F) which is warm and makes sunbathing pleasant on clear days. The annual average water temperature is typically 25.3°C (77.6°F) which is warm and pleasant for relaxing and swimming for long periods. Annually there are on average 14.8 days of rain per month and 5.9 hours of sun per day.

When is the best time to visit Okinawa Prefecture?

The best months to visit Okinawa Prefecture are July, August, September, October, for the best beach weather, the most sunshine and optimal sunbathing and swimming conditions with the least chance of rain.

The weather is perfect for sunbathing in the months from May to October when the maximum temperature reaches above 26°C (72°F)

The sea is best for swimming between June and November when the sea temperature is above the average 25°C (78°F) which is warm and pleasant for relaxing and swimming for long periods.

Can you sunbathe in Okinawa Prefecture year round?

No, you can't sunbathe in Okinawa Prefecture all year round. Some months are too cold for sunbathing, however you might enjoy other beach activities such as taking a walk, going hiking along trails or just enjoying the scenery.

The weather is best for sunbathing in the months from May to October when the maximum temperature reaches above 26°C (72°F)

More info about the annual temperatures and sunshine.

Can you swim in Okinawa Prefecture year round?

Yes, you can swim in Okinawa Prefecture all year round.

The warmest sea water temperatures in Okinawa Prefecture are found in July when they peak at 29°C (84°F) and lowest in February when they dip to 22°C (71°F).

The sea temperature is above average for swimming between June and November when the sea temperature is above 25°C (78°F) which is warm and pleasant for relaxing and swimming for long periods.

For perfect swimming and lounging all day, try the months from June to November when the sea temperature is above 26°C (79°F)

More info about the annual sea temperatures

When is the hottest month in Okinawa Prefecture?

The hottest month in Okinawa Prefecture is July when the average maximum temperature is very hot and perfect for sunbathing on clear days 31°C (88°F), average temperature is 29°C (84°F) and average minimum temperature is 27°C (80°F).

More info about the annual temperatures and sunshine.

When is the coldest month in Okinawa Prefecture?

The coolest month in Okinawa Prefecture is January when the average maximum temperature is 18°C (65°F), average temperature is 16°C (61°F) and average minimum temperature is 14°C (57°F).

More info about the annual temperatures and sunshine

When is the sunniest month in Okinawa Prefecture?

The sunniest days in Okinawa Prefecture are in May which has the most hours of sunshine per day. In May the sunshine percentage is 54% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.3 hours of sunshine per day.

More info about the annual sunshine.

When is the least sunny month in Okinawa Prefecture?

December has the least sunshine. In December the sunshine percentage is 43.4% making it quite sunny but with regular periods of cloudy and overcast skies. There are 4.5 hours of sunshine per day.

More info about the annual sunshine.

When is the driest month in Okinawa Prefecture?

The driest month in Okinawa Prefecture is January with 0.5cm (0.2inches) of rain and July has the fewest days of rain with 11.6 days with some rain, a pretty wet time to visit the beach.

More info about the annual rainfall

When is the wettest month in Okinawa Prefecture?

The wettest month in Okinawa Prefecture is May with 2.7cm (1.1inches) of rain and January has the most days of rain with 17.4 days with some rain, a wet time to visit the beach.

More info about the annual rainfall.

When is the sea the coldest in Okinawa Prefecture?

The coldest sea water temperatures in Okinawa Prefecture are found in February when they dip to 22°C (71°F) which is comfortable for swimming though some may prefer warmer water.

More info about the annual sea temperatures.

When is the sea the warmest in Okinawa Prefecture?

The warmest sea water temperatures in Okinawa Prefecture are found in July when they peak at 29°C (84°F) which is very warm and ideal for relaxing and swimming for the whole day.

More info about the annual sea temperatures.

When is the most humid month in Okinawa Prefecture?

The most humid month in Okinawa Prefecture is August with a dew point (an indicator of humidity) of 26°C (78°F) which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning.

More info about the annual humidity.

When is the least humid month in Okinawa Prefecture?

The least humid month in Okinawa Prefecture is January with a dew point of 12°C (54°F) which is very comfortable.

More info about the annual humidity.

When is the windiest month in Okinawa Prefecture?

The most windy month in Okinawa Prefecture is October when the average maximum windspeed is 29KM/H (18MPH) and the average wind speed is 21KM/H (13MPH).

More info about the annual wind conditions.

Annual Temperature for Okinawa Prefecture

The hottest month in Okinawa Prefecture is July when the average maximum temperature is 31°C (88°F), average temperature is 29°C (84°F) and average minimum temperature is 27°C (80°F).

The coolest month in Okinawa Prefecture is January when the average maximum temperature is 18°C (18°F), average temperature is 16°C (61°F) and average minimum temperature is 14°C (57°F).

Annual Sunshine for Okinawa Prefecture

The longest days in Okinawa Prefecture are in June, with an average of 13.8 hours of daylight per day. December has the shortest days with an average of 10.5 hours of daylight per day.

The sunniest days in Okinawa Prefecture are in May which has the most hours of sunshine per day. The sunshine percentage is 54% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.3 hours of sunshine per day.

December has the least sunshine. The sunshine percentage is 43.4% making it quite sunny but with regular periods of cloudy and overcast skies. There are 4.5 hours of sunshine per day.

The ultraviolet index is the highest in July when it reaches 12.6 and lowest in December when it reaches 5.3.

An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. 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.

Annual Sea Temperature for Okinawa Prefecture

The warmest sea water temperatures in Okinawa Prefecture are found in July when they peak at 29°C (84°F) and lowest in February when they dip to 22°C (71°F).

The sea is best for swimming between June and November when the temperature is above 25°C (78°F) which is warm and pleasant for relaxing and swimming for long periods.

Annual Rainfall for Okinawa Prefecture

The wettest month in Okinawa Prefecture is May with 2.7cm (1.1inches) of rain and January has the most days of rain with 17.4 days with some rain, a wet time to visit the beach.

The driest month in Okinawa Prefecture is January with 0.5cm (0.2inches) of rain and July has the fewest days of rain with 11.6 days with some rain, a pretty wet time to visit the beach.

Annual Humidity for Okinawa Prefecture

The most humid month in Okinawa Prefecture is August with a dew point (an indicator of humidity) of 26°C (78°F) which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning.

The least humid month in Okinawa Prefecture is January with a dew point of 12°C (54°F) which is very comfortable.

Annual Wind Speed for Okinawa Prefecture

The most windy month in Okinawa Prefecture is October when the average maximum windspeed is 29KM/H (18MPH) and the average wind speed is 21KM/H (13MPH).

The least windy month in Okinawa Prefecture is May when the average maximum windspeed is 25KM/H (15MPH) and the average wind speed is 17KM/H (10MPH).

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