When to go
The Best Time to Visit San Sebastián
Month-by-month climate data for San Sebastián, Spain — daily highs and lows, rain days, and an honest verdict for every month of the year.
May–June, September. Warm without August's Semana Grande crush; September brings the film festival and the year's best sea temperatures.
Warmest in San Sebastián: Aug (25°C / 77°F) · Coolest: Jan (12°C / 54°F) · Wettest: Dec (~17 rain days)
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)
San Sebastián climate, month by month
January
12° / 6°C
~14 rain days
Fair
February
15° / 8°C
~13 rain days
Good
March
16° / 8°C
~16 rain days
Good
April
17° / 10°C
~13 rain days
Good
May
20° / 12°C
~16 rain days
Good
June
22° / 15°C
~16 rain days
Good
July
24° / 17°C
~11 rain days
Excellent
August
25° / 18°C
~13 rain days
Excellent
September
23° / 16°C
~14 rain days
Good
October
21° / 14°C
~14 rain days
Good
November
16° / 10°C
~16 rain days
Good
December
14° / 8°C
~17 rain days
Fair
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