Current sea water temperature:
+58.1°F
| Minimum sea water temperature in January: | 59.0°F |
| Maximum sea water temperature in January: | 52.3°F |
| Average sea water temperature in January: | 55.3°F |
| more information | |
14 days
forecast
forecast
| San Sebastian |
monthly
weather
weather
| San Sebastian |
Sea water temperature for the last 10 days:
| January 1 | 58.1°F | December 27 | 57.9°F |
| December 31 | 57.2°F | December 26 | 58.3°F |
| December 30 | 57.4°F | December 25 | 57.9°F |
| December 29 | 57.6°F | December 24 | 58.3°F |
| December 28 | 57.7°F | December 23 | 58.3°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: 20:20
January 01, thursday
2100
43°F
N
6 mph
6 mph
January 02, friday
0000
43°F
N
6 mph
6 mph
0300
45°F
N
6 mph
6 mph
0600
46°F
NW
5 mph
5 mph
0900
46°F
N
3 mph
3 mph
1200
50°F
NW
4 mph
4 mph
1500
54°F
SW
4 mph
4 mph
1800
48°F
W
5 mph
5 mph
