Current sea water temperature:
+75.7°F
| Minimum sea water temperature in August: | 76.5°F |
| Maximum sea water temperature in August: | 69.6°F |
| Average sea water temperature in August: | 72.8°F |
| more information | |
14 days
forecast
forecast
| San Sebastian |
monthly
weather
weather
| San Sebastian |
Sea water temperature for the last 10 days:
| August 25 | 75.7°F | August 20 | 75.6°F |
| August 24 | 75.7°F | August 19 | 75.4°F |
| August 23 | 75.4°F | August 18 | 75.7°F |
| August 22 | 75.9°F | August 17 | 75.6°F |
| August 21 | 75.7°F | August 16 | 75.0°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:
2026
2025
2024
The average sea water temperature in August of 2026 was 75.1°F. The highest and lowest sea temperatures during the month were 76.3°F and 73.9°F.
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 75.8°F. The highest and lowest sea temperatures during the month were 77.2°F and 74.5°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
August
August
| 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: 16:35
August 25, tuesday
1800
73°F
S
6 mph
6 mph
2100
64°F
SW
2 mph
2 mph
August 26, wednesday
0000
63°F
NW
2 mph
2 mph
0300
61°F
NW
3 mph
3 mph
0600
61°F
N
4 mph
4 mph
0900
66°F
NE
2 mph
2 mph
1200
84°F
N
7 mph
7 mph
1500
93°F
N
6 mph
6 mph
