Measurements:
°C
°F
CURRENT WEATHER
10:13
San Sebastian
66°F
SE 2 mph
Feels like: 66°F
Precip: 0%
World Resorts Spain San Sebastian Weather

7 Day Weather Forecast

05.30
sat
DAY
72°F
SE 6 mph
precip
0%
NIGHT
56°F
NE 4 mph
precip
0%
05.31
sun
DAY
68°F
SE 7 mph
precip
0%
NIGHT
54°F
N 2 mph
precip
0%
06.01
mon
DAY
72°F
S 5 mph
precip
0%
NIGHT
56°F
NE 2 mph
precip
0%
06.02
tue
DAY
62°F
E 8 mph
precip
100%
NIGHT
52°F
E 6 mph
precip
100%
06.03
wed
DAY
70°F
SE 5 mph
precip
0%
NIGHT
64°F
NE 2 mph
precip
0%
06.04
thu
DAY
76°F
SW 6 mph
precip
0%
NIGHT
64°F
NE 4 mph
precip
0%
06.05
fri
DAY
78°F
SE 4 mph
precip
0%
NIGHT
64°F
NE 4 mph
precip
100%

San Sebastian Sea Water Temperature in May, °F

Select Year: 2026 2025 2024

The average sea surface temperature in May 2026 for San Sebastian was 17.1°F. The maximum and minimum values were 15.7°F and 19.6°F respectively.

San Sebastian on the Weather Map

Best Time to Visit San Sebastian
The most sunny months:
August 16 days
September 15 days
October 14 days
The most warm months:
August 79.7 °F
July 77.5 °F
September 76.1 °F
Warmest sea temperature:
August 75.2 °F
July 73.6 °F
September 72.6 °F
The most cold months:
January 51.6 °F
February 54.0 °F
December 55.1 °F
The most rainy months:
November 9 days
January 8 days
February 7 days
The most windy months:
February 9 mph
November 8 mph
January 8 mph
more details