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Hourly Forecast
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05:59
Sunrise
17:55
Sunset
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Waxing Gibbous
17:22
Moonrise
04:54
Moonset
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View stargazing scoreWeather in San Sebastián today, September 25, 2026
San Sebastián starts September 25, 2026 looking damp, with rain in the forecast and wetter spells likely at times. Waterproof kit is the safer call for early plans. Morning plans should assume damp conditions, as rain chances climb toward 56% around 10:00. Cloud cover is also at its densest near 01:00 at roughly 96%.
The day peaks near 29°C and cools toward 23°C. Expect humidity between 71% and 98%, most humid near 15:00. Airflow remains manageable, reaching about 3.7 km/h around 09:00.
The second half of the day still looks unsettled, with rain probability around 100% by 16:00. Dense cloud near 100% at 18:00 keeps the feel grey. Visibility holds near 15.4 km, though it can fall to 4.7 km. Sunrise is at 05:59 and sunset at 17:55, giving 11 hours 56 minutes of sunlight today.
Overall, San Sebastián on September 25, 2026 suits indoor plans or waterproof kit, especially while rain chances stay near 100% and the high sits around 29°C.
Frequently asked questions about weather in San Sebastián
How warm does it get in San Sebastián?
The warmest month in San Sebastián is April, with average high temperatures of 34°C. The average temperature during this period is around 28°C.
How cold does it get in San Sebastián?
The coldest month in San Sebastián is January, with average low temperatures of 22°C. The average temperature during this period is around 26°C.
What is the wettest time of year in San Sebastián?
The wettest month in San Sebastián is June, with an average of 489mm of precipitation.
What is the driest time of year in San Sebastián?
The driest month in San Sebastián is February, with an average of 16mm of precipitation.
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