18.12
thu
thu
Day
59°F
N 15 mph
Precip.
0%
0%
Night
54°F
N 9 mph
Precip.
0%
0%
19.12
fri
fri
Day
52°F
SE 8 mph
Precip.
100%
100%
Night
48°F
E 1 mph
Precip.
100%
100%
20.12
sat
sat
Day
55°F
N 6 mph
Precip.
0%
0%
Night
45°F
N 9 mph
Precip.
0%
0%
21.12
sun
sun
Day
50°F
NE 6 mph
Precip.
0%
0%
Night
41°F
NW 8 mph
Precip.
0%
0%
22.12
mon
mon
Day
46°F
N 13 mph
Precip.
0%
0%
Night
43°F
N 7 mph
Precip.
0%
0%
23.12
tue
tue
Day
50°F
N 6 mph
Precip.
0%
0%
Night
46°F
NW 6 mph
Precip.
29%
29%
24.12
wed
wed
Day
46°F
W 1 mph
Precip.
100%
100%
Night
45°F
SE 6 mph
Precip.
100%
100%
25.12
thu
thu
Day
48°F
SE 14 mph
Precip.
100%
100%
Night
45°F
NE 7 mph
Precip.
100%
100%
26.12
fri
fri
Day
48°F
S 7 mph
Precip.
100%
100%
Night
48°F
S 6 mph
Precip.
100%
100%
27.12
sat
sat
Day
48°F
SW 3 mph
Precip.
81%
81%
Night
45°F
W 3 mph
Precip.
58%
58%
28.12
sun
sun
Day
45°F
SW 3 mph
Precip.
82%
82%
Night
41°F
N 2 mph
Precip.
0%
0%
29.12
mon
mon
Day
48°F
NE 2 mph
Precip.
0%
0%
Night
43°F
N 2 mph
Precip.
77%
77%
30.12
tue
tue
Day
48°F
SW 4 mph
Precip.
100%
100%
Night
43°F
NW 2 mph
Precip.
0%
0%
31.12
wed
wed
Day
46°F
W 3 mph
Precip.
0%
0%
Night
39°F
NW 4 mph
Precip.
0%
0%
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 December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 59.0°F. The highest and lowest sea temperatures during the month were 59.9°F and 58.1°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 55.8°F. The highest and lowest sea temperatures during the month were 56.7°F and 54.7°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: 09:11
December 18, thursday
1200
59°F
N
15 mph
15 mph
1500
61°F
N
16 mph
16 mph
1800
55°F
N
14 mph
14 mph
2100
55°F
N
13 mph
13 mph
December 19, friday
0000
54°F
N
9 mph
9 mph
0300
52°F
N
7 mph
7 mph
0600
52°F
N
6 mph
6 mph
0900
52°F
NE
4 mph
4 mph
