Measurements:
°C
°F
CURRENT WEATHER
23:54
San Sebastian
70°F
N 7 mph
Feels like: 70°F
Precip: 20%
World Resorts Spain San Sebastian Weather

7 Day Weather Forecast

09.28
mon
DAY
78°F
N 6 mph
precip
15%
NIGHT
70°F
N 7 mph
precip
20%
09.29
tue
DAY
80°F
N 12 mph
precip
3%
NIGHT
76°F
N 9 mph
precip
8%
09.30
wed
DAY
74°F
NE 3 mph
precip
18%
NIGHT
64°F
S 4 mph
precip
47%
10.01
thu
DAY
62°F
S 3 mph
precip
41%
NIGHT
62°F
NE 2 mph
precip
78%
10.02
fri
DAY
64°F
NE 1 mph
precip
75%
NIGHT
64°F
E 2 mph
precip
43%
10.03
sat
DAY
68°F
E 2 mph
precip
20%
NIGHT
62°F
NE 3 mph
precip
36%
10.04
sun
DAY
68°F
SE 5 mph
precip
40%
NIGHT
58°F
NE 4 mph
precip
25%

San Sebastian Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for San Sebastian was 22.4°F. The maximum and minimum values were 21.7°F and 23.2°F respectively.

San Sebastian on the Weather Map

Best Time to Visit San Sebastian
The most sunny months:
August 15 days
October 14 days
September 14 days
The most warm months:
August 79.8 °F
July 77.7 °F
September 76.1 °F
Warmest sea temperature:
August 75.3 °F
July 73.9 °F
September 72.7 °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
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