Average sea water temperature in December:
+32.8°F
| Minimum sea water temperature in December: | 38.3°F |
| Maximum sea water temperature in December: | 28.4°F |
Daily 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.
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Monthly sea water temperature in Seinajoki, °F
Which Finland resorts have warmest sea in December?
| Place name | December 2025 | December 2024 |
|---|---|---|
| Espoo | 40.1°F | 38.5°F |
| Vantaa | 39.8°F | 38.2°F |
| Helsinki | 39.8°F | 38.2°F |
| Kotka | 39.2°F | 38.1°F |
| Turku | 38.9°F | 36.7°F |
| Koli National Park | 38.4°F | 36.7°F |
| Porvoo | 38.1°F | 36.5°F |
| Imatra | 38.0°F | 37.0°F |
| Pori | 37.5°F | 35.2°F |
| Juvaskyla | 37.4°F | 35.9°F |
| Lahti | 36.9°F | 35.3°F |
| Savolinna | 36.5°F | 35.6°F |
| Lappeenranta | 36.1°F | 35.4°F |
| Saariselka | 34.3°F | 33.8°F |
| Oulu | 34.3°F | 30.9°F |
| Vaasa | 34.3°F | 32.5°F |
| Seinajoki | 33.1°F | 31.6°F |
| Kemi | 32.0°F | 31.7°F |
Best time for vacation in Seinajoki
Seinajoki on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Seinajoki
Local time: 19:34
December 25, thursday
2100
39°F
SE
9 mph
9 mph
December 26, friday
0000
36°F
SE
7 mph
7 mph
0300
34°F
SE
6 mph
6 mph
0600
34°F
S
6 mph
6 mph
0900
32°F
SE
4 mph
4 mph
1200
32°F
E
5 mph
5 mph
1500
32°F
E
4 mph
4 mph
1800
32°F
NE
5 mph
5 mph
