Current Sea Water Temperature:
+62.8°F
| Maximum Sea Water Temperature in April: | 63.0°F |
| Minimum Sea Water Temperature in April: | 53.2°F |
| Average water temperature in April: | 57.5°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| April 26 | 62.8°F | April 21 | 60.2°F |
| April 25 | 63.0°F | April 20 | 61.2°F |
| April 24 | 62.2°F | April 19 | 60.4°F |
| April 23 | 61.8°F | April 18 | 59.4°F |
| April 22 | 61.8°F | April 17 | 59.2°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 2025 for San Sebastian was 76.5°F. The maximum and minimum values were 74.6°F and 78.8°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2025 for San Sebastian was 76.3°F. The maximum and minimum values were 74.8°F and 77.8°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for San Sebastian was 72.5°F. The maximum and minimum values were 70.2°F and 74.4°F respectively.
Spain Resorts:
NAME
F°
| Alicante |  |
+68 |
| Barcelona | |
+70 |
| Costa Adeje | |
+68 |
| Costa Brava | |
+70 |
| Eivissa |  |
+66 |
| Fuerteventura | |
+70 |
| Gran Canaria |  |
+66 |
| Lloret de Mar | |
+72 |
| Madrid | |
+72 |
| Malaga | |
+68 |
| Palma de Majorka | |
+70 |
| Palma de Mallorca | |
+70 |
| Tenerife | |
+58 |
| Torrevieja | |
+68 |
| Valencia | |
+68 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
San Sebastian
Local time: 12:09
26 apr, sunday
| 1500 |  |
70°F | S 7 mph |
| 1800 | |
68°F | S 4 mph |
| 2100 |  |
54°F | SE 1 mph |
27 apr, monday
| 0000 |  |
52°F | NE 2 mph |
| 0300 |  |
56°F | NE 2 mph |
| 0600 | |
58°F | NE 2 mph |
| 0900 |  |
62°F | E 2 mph |
| 1200 | |
64°F | SE 2 mph |