Current Sea Water Temperature:
+74.0°F
| Maximum Sea Water Temperature in September: | 77.0°F |
| Minimum Sea Water Temperature in September: | 68.4°F |
| Average water temperature in September: | 72.7°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| September 28 | 74.0°F | September 23 | 73.6°F |
| September 27 | 73.8°F | September 22 | 73.8°F |
| September 26 | 73.4°F | September 21 | 73.4°F |
| September 25 | 73.6°F | September 20 | 74.0°F |
| September 24 | 73.6°F | September 19 | 74.0°F |
When is the Warmest Sea for San Sebastian?
According to our data for the last three years for San Sebastian the highest average sea water temperature was in August, July and September.
Average Water Temperature by Month, °F
Sea Water Temperature in August
The average sea surface temperature in August 2026 for San Sebastian was 77.8°F. The maximum and minimum values were 76.4°F and 79.2°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2026 for San Sebastian was 78.7°F. The maximum and minimum values were 77.2°F and 80.2°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2026 for San Sebastian was 74.9°F. The maximum and minimum values were 73.4°F and 76.4°F respectively.
Spain Resorts:
NAME
F°
| Alicante |  |
+78 |
| Barcelona | |
+76 |
| Costa Brava | |
+74 |
| Eivissa | |
+76 |
| Gran Canaria |  |
+72 |
| Lloret de Mar | |
+70 |
| Madrid |  |
+60 |
| Malaga | |
+68 |
| Marbella | |
+68 |
| Palma de Majorka | |
+76 |
| Palma de Mallorca | |
+76 |
| Salou | |
+78 |
| Tenerife | |
+68 |
| Torrevieja | |
+78 |
| Valencia | |
+78 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
San Sebastian
Local time: 23:55
29 sep, tuesday
| 0000 |  |
70°F | N 7 mph |
| 0300 | |
66°F | N 6 mph |
| 0600 | |
64°F | N 8 mph |
| 0900 | |
66°F | N 8 mph |
| 1200 |  |
80°F | N 12 mph |
| 1500 | |
86°F | N 13 mph |
| 1800 | |
86°F | NW 12 mph |
| 2100 | |
80°F | N 13 mph |