Yokosuka 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
Good
Best time to visit: April – November
What is the weather like in Yokosuka in August?
In August, Yokosuka is hot: daytime highs average 29 °C, and even at night it stays warm at around 25 °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 105 mm in total. On about 7 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is a good month for a holiday in Yokosuka.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 67 | 63 | 64 |
| Day | 27° | 29° | 26° |
| Night | 23° | 25° | 22° |
| Sea | 24° | 26° | 26° |
| Sun | 5 h | 6 h | 4 h |
| Rain days | 12 | 11 | 13 |
More details for August
- Daylight
- 13 h 32 min05:00 – 18:32
- UV index
- 9 · very highclear sky, noon (estimate)All months
- Muggy days
- 30 daysdew point 18 °C or moreAll months
- Wind
- 23 km/haverage daily peakAll months
- Cloud cover
- 62 %on averageAll months
- Hot days
- 7 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+9Asia/Tokyo
How the score comes together
- Temperatureweight 50 %77 %
- Sunshineweight 20 %47 %
- 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
- Insect repellent
- Rain jacket or umbrella
Yokosuka in August: quick answers
Is Yokosuka hot in August?
Yes. In August, Yokosuka is hot: daytime highs average 29 °C and nights stay around 25 °C. On about 7 days the thermometer climbs to 30 °C or more.
Can you swim in Yokosuka in August?
Yes. In August the sea averages 26.2 °C – lovely and warm for swimming.
Does it rain much in Yokosuka in August?
Rain is frequent, with about 11 rainy days and 105 mm in total.
Yokosuka month by month
The whole year in YokosukaAll 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). Sources & licences