Weather in San Sebastian: May
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Average day temperature: | 65.2°F |
| Average night temperature: | 53.2°F | |
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Sea water temperature: | 60.8°F |
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Number of sunny days: | 10 days |
| Day length: | 14.1 - 15.2 hours | |
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Number of rainy days: | 5 days |
| Precipitation totals: | 2.8 in. | |
| more information | ||
14 days
forecast
forecast
| San Sebastian |
sea water
temperature
temperature
| San Sebastian |
Air temperature in May, °F
Show year:
2026
2025
2024
The highest day temperature during May of 2026 was 86°F. At the same time the lowest night temperature was 44°F. Daily and nightly averages during May were 68.5°F and 53.9°F.
Sea water temperature in San Sebastian in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 63.0°F. The highest and lowest sea temperatures during the month were 67.3°F and 60.3°F.
Sunny, partly cloudy and cloudy days
Number of sunny, partly cloudy and cloudy days in May is almost equal.
Precipitation total in May, in.
Precipitation total value in San Sebastian in May is 2.5 in. Other months of the year show relatively similar values.
Wind speed in May, mph
The average wind speed value in May is 5.9 mph
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in May is: 7.2.
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: 22:35
June 13, saturday
0000
55°F
N
4 mph
4 mph
0300
55°F
N
4 mph
4 mph
0600
55°F
NW
4 mph
4 mph
0900
70°F
NW
3 mph
3 mph
1200
82°F
W
4 mph
4 mph
1500
90°F
W
5 mph
5 mph
1800
88°F
W
9 mph
9 mph
2100
73°F
W
7 mph
7 mph
