Current sea water temperature:
+56.7°F
| Minimum sea water temperature in April: | 61.2°F |
| Maximum sea water temperature in April: | 52.9°F |
| Average sea water temperature in April: | 56.6°F |
| more information | |
14 days
forecast
forecast
| San Sebastian |
monthly
weather
weather
| San Sebastian |
Sea water temperature for the last 10 days:
| April 5 | 56.7°F | March 31 | 55.6°F |
| April 4 | 55.4°F | March 30 | 55.9°F |
| April 3 | 55.4°F | March 29 | 55.2°F |
| April 2 | 55.9°F | March 28 | 55.2°F |
| April 1 | 55.6°F | March 27 | 55.6°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
April
April
| 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: 17:41
April 05, sunday
1800
61°F
SW
6 mph
6 mph
2100
50°F
SW
2 mph
2 mph
April 06, monday
0000
50°F
NW
2 mph
2 mph
0300
52°F
NW
2 mph
2 mph
0600
54°F
NW
5 mph
5 mph
0900
55°F
N
7 mph
7 mph
1200
70°F
N
8 mph
8 mph
1500
77°F
NW
9 mph
9 mph
