See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
21°
Humid and Overcast
Feels Like: 20°
Min: 20°
Max: 28°
The next few hours will be possible drizzle, with today reaching 28°C and dropping to 20°C. The coming days will be light rain throughout the day and possible thunderstorms from afternoon until night.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
05:47
Sunrise
17:44
Sunset
Moon
Waxing Gibbous
17:10
Moonrise
04:43
Moonset
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View stargazing scoreWeather in San Sebastián today, September 25, 2026
San Sebastián looks damp on September 25, 2026, so plan for wet spells during the day. Early travel and outdoor time should assume rain can arrive quickly. Wetter spells lean into the morning, when rain odds reach about 32% near 01:00. Skies look heaviest around 01:00, with cover close to 96%.
The day peaks near 28°C and cools toward 20°C. Relative humidity sits between 62% and 100%, reaching its peak around 01:00. A lighter breeze peaks around 15:00 near 3.2 km/h.
Expect the wet theme to continue later, as rain odds reach 40% near 13:00. Cloud amounts hold near 96% around 23:00. Visibility stays generally good near 15.0 km on average, though it can drop toward 0.5 km in thicker cloud or showers. Sunrise is at 05:47 and sunset at 17:44, giving 11 hours 56 minutes of sunlight today.
The practical takeaway for San Sebastián on September 25, 2026 is simple: plan for rain, keep layers handy, and work around a high of about 28°C.
Frequently asked questions about weather in San Sebastián
How warm does it get in San Sebastián?
The warmest month in San Sebastián is March, with average high temperatures of 35°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 21°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 348mm of precipitation.
What is the driest time of year in San Sebastián?
The driest month in San Sebastián is January, with an average of 3mm of precipitation.
