Climate Insights for Ogasawara

The climate in Ogasawara is warm and mild. The average annual temperature is 23°C and approximately 1267mm of precipitation falls per year. Ogasawara receives a notable amount of rainfall throughout the year, including during its driest month. Ogasawara is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, September, July. The coldest months are February, January, March, when temperatures can drop to 17°C.

Ogasawara sees moderate temperature variation throughout the year, ranging from 17°C to 28°C. The warmest month is August, when average highs reach 28°C and the mean temperature sits around 28°C. February is the coolest month, with minimum temperatures around 17°C and an average of 18°C. Daily temperature variation is modest, with an average difference of 1°C between highs and lows. The sharpest temperature change occurs between November and December, with a 3°C shift in average temperatures.

Ogasawara is a fairly wet location, receiving approximately 1267mm of precipitation annually, which averages out to around 106mm per month. The wettest month is August, averaging 153mm of rainfall. May and October also tend to see above-average precipitation. The driest month is February, with just 57mm. That's 96mm less than August, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

Ogasawara is moderately windy, with an average annual wind speed of 29km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 35km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in July, with average winds dropping to 23km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 12km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 34km/h in winter, 30km/h in spring, 25km/h in summer, 29km/h in autumn.

It is currently spring in Ogasawara, which began on March 20, 2026. Ogasawara is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 28°C, while the coldest stretch bottoms out in February near 17°C. Summer is next, beginning on June 21, 2026 — 88 days from now.

The best time to visit Ogasawara is during January, February, March and April, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 69mm per month. By contrast, August can be uncomfortably hot with temperatures reaching 28°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Ogasawara based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.