Spain · Atlantic Europe
San Sebastián
Sea
75.7°F
Air
–
UV
–
Beach day
23–28°C
More like this
All beaches · Spain
Climate · monthly averages
Sea temperature by month
5-year averages (2021–2025). Min/Max are typical daily lows and highs, not record extremes.
46°F
50°F
54°F
57°F
61°F
64°F
68°F
72°F
75°F
79°F
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
MinMin °F
5454.2
5453.6
5454.3
5655.6
5959.5
6766.5
7069.7
7271.7
6969.4
6564.8
6060.5
5656.2
AvgAvg °F
5655.7
5554.8
5555.1
5756.9
6161.2
6868.4
7271.9
7373.2
7170.6
6666.2
6261.9
5858.1
MaxMax °F
5756.8
5655.9
5655.9
5857.9
6262.5
7070.1
7373.2
7473.8
7272.4
6868.3
6362.7
5959.3
Warmest in August (73.2°F). Coldest in February (54.8°F). Comfortable for swimming from June to October.
About San Sebastián
San Sebastián, known in Basque as Donostia, curves around La Concha bay on the southern edge of the Bay of Biscay, twenty kilometres west of the French border in the province of Gipuzkoa. Playa de la Concha rings the central crescent with fine, tide-flat sand sheltered by Santa Clara island, while surf-tuned Playa de Zurriola breaks open to the Atlantic on the Gros side of the Urumea river. Sea temperatures reach 20–22 °C from July through September, the only swimmable window on this coast.