Spain · Atlantic Europe
San Sebastián
Sea
—
Air
—
UV
—
More like this
Climate · monthly averages
Sea temperature by month
30-year averages (1996–2025). 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
January
55.1°F(54°F–57°F)
February
54.0°F(53°F–55°F)
March
54.4°F(53°F–56°F)
April
56.5°F(55°F–58°F)
May
60.6°F(59°F–63°F)
June
66.6°F(65°F–70°F)
July
70.7°F(68°F–74°F)
August
72.1°F(70°F–74°F)
September
69.8°F(68°F–71°F)
October
65.4°F(63°F–68°F)
November
60.7°F(59°F–63°F)
December
57.1°F(56°F–59°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 | 5453.8 | 5352.8 | 5353.3 | 5555.3 | 5959.1 | 6564.6 | 6868.1 | 7070.0 | 6868.1 | 6363.5 | 5958.6 | 5655.6 |
| AvgAvg °F | 5555.1 | 5454.0 | 5454.4 | 5756.5 | 6160.6 | 6766.6 | 7170.7 | 7272.1 | 7069.8 | 6565.4 | 6160.7 | 5757.1 |
| MaxMax °F | 5756.8 | 5555.5 | 5655.7 | 5858.4 | 6362.9 | 7069.6 | 7473.5 | 7473.9 | 7171.3 | 6867.5 | 6362.7 | 5959.2 |
Warmest in August (72.1°F). Coldest in February (54.0°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.