29.08
sat
sat
Day
79°F
E 4 mph
Precip.
1%
1%
Night
61°F
N 3 mph
Precip.
12%
12%
30.08
sun
sun
Day
77°F
S 4 mph
Precip.
3%
3%
Night
63°F
N 1 mph
Precip.
49%
49%
31.08
mon
mon
Day
70°F
S 5 mph
Precip.
22%
22%
Night
59°F
NW 2 mph
Precip.
24%
24%
01.09
tue
tue
Day
66°F
S 3 mph
Precip.
33%
33%
Night
61°F
SE 1 mph
Precip.
24%
24%
02.09
wed
wed
Day
70°F
S 5 mph
Precip.
4%
4%
Night
55°F
N 3 mph
Precip.
20%
20%
03.09
thu
thu
Day
72°F
S 4 mph
Precip.
2%
2%
Night
57°F
N 3 mph
Precip.
12%
12%
04.09
fri
fri
Day
75°F
NW 4 mph
Precip.
2%
2%
Night
61°F
N 3 mph
Precip.
14%
14%
05.09
sat
sat
Day
75°F
SW 5 mph
Precip.
3%
3%
Night
66°F
N 2 mph
Precip.
7%
7%
06.09
sun
sun
Day
75°F
S 5 mph
Precip.
3%
3%
Night
61°F
NE 2 mph
Precip.
43%
43%
07.09
mon
mon
Day
73°F
NW 4 mph
Precip.
9%
9%
Night
63°F
W 2 mph
Precip.
41%
41%
08.09
tue
tue
Day
75°F
SE 5 mph
Precip.
9%
9%
Night
63°F
N 2 mph
Precip.
37%
37%
09.09
wed
wed
Day
59°F
SW 4 mph
Precip.
79%
79%
Night
55°F
NW 1 mph
Precip.
46%
46%
10.09
thu
thu
Day
61°F
SW 6 mph
Precip.
22%
22%
Night
55°F
NW 1 mph
Precip.
24%
24%
11.09
fri
fri
Day
59°F
NW 3 mph
Precip.
66%
66%
Night
55°F
W 3 mph
Precip.
46%
46%
sea water
temperature
temperature
| San Sebastian |
monthly
weather
weather
| San Sebastian |
current
weather
weather
| San Sebastian |
7 days
forecast
forecast
| San Sebastian |
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 75.1°F. The highest and lowest sea temperatures during the month were 76.3°F and 73.8°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.
Air temperature in San Sebastian, °F
Precipitation total in San Sebastian, in.
* Charts above show average data for the last 3 years.
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: 10:10
August 29, saturday
1200
79°F
E
4 mph
4 mph
1500
81°F
S
7 mph
7 mph
1800
77°F
S
5 mph
5 mph
2100
64°F
E
3 mph
3 mph
August 30, sunday
0000
61°F
N
3 mph
3 mph
0300
61°F
N
4 mph
4 mph
0600
59°F
N
4 mph
4 mph
0900
64°F
N
2 mph
2 mph
