San Sebastián Weather in August
What's the weather like in San Sebastián (Basque Country) in August 2025?
The climate in San Sebastián during August can be summarized as warm and a little damp.
August is in the summer in San Sebastián and is typically the warmest month of the year. Daytime maximum temperatures average around 24°C (74°F), whilst at night 16°C (60°F) is normal.
| Daytime temperature | 23.6°C 74.4°F |
|---|---|
| Nightly temperature | 15.5°C 59.8°F |
| Average temperature | 19.5°C 67.1°F |
| Daily sunshine | 7 hrs |
| Avg rainfall | 90 mm 3.5 ins |
| Rainy days | 13 days |
| Sea temperature | 21.8°C 71.2°F |
| Humidity | 78% |
| Windspeed | 11.5kph 7 mph |
On average August is the 3rd driest month of the year in San Sebastián with around 90mm 3.5 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 13 days, although this may vary considerably.
On the flip side this corresponds to an average of 7 hours of sunshine per day.
August temperatures in San Sebastián
August rainfall
August hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in San Sebastián in August 2025.
Other monthly averages
Best places to visit in August
San Sebastián weather stats
| Hottest month: | August | 23.4°C 74.1°F |
|---|---|---|
| Driest month: | July | 62mm 2.4ins |
| Sunniest month: | July | 7.6hrs |
| Coldest month: | January | 10.9°C 51.6°F |
| Wettest month: | November | 143mm 5.6ins |
© Google
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