Current sea water temperature:
+60.8°F
| Minimum sea water temperature in May: | 69.6°F |
| Maximum sea water temperature in May: | 56.3°F |
| Average sea water temperature in May: | 60.7°F |
| more information | |
14 days
forecast
forecast
| San Sebastian |
monthly
weather
weather
| San Sebastian |
Sea water temperature for the last 10 days:
| May 16 | 60.8°F | May 11 | 61.5°F |
| May 15 | 61.3°F | May 10 | 61.2°F |
| May 14 | 61.9°F | May 9 | 61.0°F |
| May 13 | 61.5°F | May 8 | 61.0°F |
| May 12 | 62.1°F | May 7 | 61.2°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
May
May
| 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: 07:16
May 17, sunday
0900
55°F
N
3 mph
3 mph
1200
63°F
SE
6 mph
6 mph
1500
61°F
SE
9 mph
9 mph
1800
59°F
SE
7 mph
7 mph
2100
55°F
SE
4 mph
4 mph
May 18, monday
0000
50°F
NE
3 mph
3 mph
0300
48°F
NE
1 mph
1 mph
0600
50°F
NE
3 mph
3 mph
