Tokyo weather in August
Temperature, sea and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Fair
Best time to visit: April – June, September – November
What is the weather like in Tokyo in August?
In August, Tokyo is hot: daytime highs average 30 °C, and even at night it stays warm at around 24 °C. The sea averages 26.2 °C – lovely and warm for swimming. Expect around 6 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 108 mm in total. On about 15 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is a so-so month for a holiday in Tokyo.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 58 | 56 | 64 |
| Day | 29° | 30° | 26° |
| Night | 22° | 24° | 20° |
| Sea | 24° | 26° | 25° |
| Sun | 5 h | 6 h | 4 h |
| Rain days | 13 | 11 | 14 |
More details for August
- Daylight
- 13 h 33 min05:00 – 18:33
- UV index
- 9 · very highclear sky, noon (estimate)All months
- Muggy days
- 30 daysdew point 18 °C or more
- Wind
- 19 km/haverage daily peak
- Cloud cover
- 65 %on average
- Hot days
- 15 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+9Asia/Tokyo
How the score comes together
- Temperatureweight 50 %65 %
- Sunshineweight 20 %43 %
- Few rainy daysweight 30 %49 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in August
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Tokyo in August: quick answers
Is Tokyo hot in August?
Yes. In August, Tokyo is hot: daytime highs average 30 °C and nights stay around 24 °C. On about 15 days the thermometer climbs to 30 °C or more.
Can you swim in Tokyo in August?
Yes. In August the sea averages 26.2 °C – lovely and warm for swimming.
Does it rain much in Tokyo in August?
Rain is frequent, with about 11 rainy days and 108 mm in total.
Tokyo month by month
The whole year in TokyoAll destinations: JapanWhere to go in AugustSea temperature in August
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)