July is the hottest month in San Sebastian with an average temperature of 21°C (69°F) and the coldest is January at 9°C (47°F) with the most daily sunshine hours at 6 in September. The wettest month is November with an average of 165mm of rain. The best month to swim in the sea is in August when the average sea temperature is 22°C (71°F).
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Sunrise 08:09
Sunset 17:39
Sunrise 08:09
Sunset 17:39