Current sea water temperature:
+57.6°F
| Minimum sea water temperature in December: | 61.3°F |
| Maximum sea water temperature in December: | 53.8°F |
| Average sea water temperature in December: | 57.5°F |
| more information | |
14 days
forecast
forecast
| San Sebastian |
monthly
weather
weather
| San Sebastian |
Sea water temperature for the last 10 days:
| December 29 | 57.6°F | December 24 | 58.3°F |
| December 28 | 57.7°F | December 23 | 58.3°F |
| December 27 | 57.9°F | December 22 | 58.5°F |
| December 26 | 58.3°F | December 21 | 58.3°F |
| December 25 | 57.9°F | December 20 | 58.5°F |
Monthly sea water temperature, °F
When is the warmest sea in San Sebastian?
Based on the data about daily sea water temperature for the last three years the warmest sea in San Sebastian was noticed in August, July and September.
Monthly Sea Temperatures in San Sebastian, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 73.8°F. The highest and lowest sea temperatures during the month were 75.9°F and 72.1°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 73.7°F. The highest and lowest sea temperatures during the month were 75.0°F and 72.3°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 70.2°F. The highest and lowest sea temperatures during the month were 72.0°F and 68.2°F.
current
weather
weather
| San Sebastian |
weather in
January
January
| San Sebastian |
Best time for vacation in San Sebastian
San Sebastian on a weather map
Places in Spain:
Name
°F
24 Hours Forecast
San Sebastian
Local time: 18:01
December 29, monday
2100
43°F
NE
3 mph
3 mph
December 30, tuesday
0000
43°F
NE
4 mph
4 mph
0300
43°F
NE
6 mph
6 mph
0600
45°F
E
5 mph
5 mph
0900
48°F
SE
7 mph
7 mph
1200
52°F
SE
7 mph
7 mph
1500
50°F
S
9 mph
9 mph
1800
46°F
SE
7 mph
7 mph
