29.12
mon
mon
Day
27°F
S 17 mph
Precip.
74%
74%
Night
27°F
S 15 mph
Precip.
100%
100%
30.12
tue
tue
Day
25°F
S 12 mph
Precip.
0%
0%
Night
16°F
S 2 mph
Precip.
0%
0%
31.12
wed
wed
Day
16°F
S 6 mph
Precip.
0%
0%
Night
12°F
SE 2 mph
Precip.
0%
0%
01.01
thu
thu
Day
12°F
W 3 mph
Precip.
0%
0%
Night
10°F
W 5 mph
Precip.
0%
0%
02.01
fri
fri
Day
16°F
W 10 mph
Precip.
100%
100%
Night
14°F
SW 11 mph
Precip.
25%
25%
03.01
sat
sat
Day
14°F
SW 9 mph
Precip.
100%
100%
Night
14°F
SW 7 mph
Precip.
100%
100%
04.01
sun
sun
Day
14°F
SW 6 mph
Precip.
100%
100%
Night
12°F
NW 2 mph
Precip.
51%
51%
sea water
temperature
temperature
| Seinajoki |
monthly
weather
weather
| Seinajoki |
current
weather
weather
| Seinajoki |
14 days
forecast
forecast
| Seinajoki |
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 33.1°F. The highest and lowest sea temperatures during the month were 36.5°F and 30.7°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 30.7°F. The highest and lowest sea temperatures during the month were 33.3°F and 28.4°F.
Air temperature in Seinajoki, °F
Precipitation total in Seinajoki, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Seinajoki
Seinajoki on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Seinajoki
Local time: 14:42
December 29, monday
1500
27°F
S
17 mph
17 mph
1800
27°F
S
14 mph
14 mph
2100
25°F
S
14 mph
14 mph
December 30, tuesday
0000
27°F
S
15 mph
15 mph
0300
27°F
S
15 mph
15 mph
0600
25°F
S
14 mph
14 mph
0900
25°F
S
13 mph
13 mph
1200
25°F
S
12 mph
12 mph
