Average sea water temperature in December:
+31.1°F
| Minimum sea water temperature in December: | 36.5°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 34.6°F. The highest and lowest sea temperatures during the month were 36.5°F and 32.5°F.
Monthly sea water temperature in Oulu, °F
Which Finland resorts have warmest sea in December?
| Place name | December 2025 | December 2024 |
|---|---|---|
| Espoo | 40.3°F | 38.5°F |
| Vantaa | 40.1°F | 38.2°F |
| Helsinki | 40.1°F | 38.2°F |
| Kotka | 39.8°F | 38.1°F |
| Turku | 39.1°F | 36.7°F |
| Koli National Park | 39.1°F | 36.7°F |
| Porvoo | 38.6°F | 36.5°F |
| Imatra | 38.6°F | 37.0°F |
| Juvaskyla | 38.0°F | 35.9°F |
| Lahti | 37.5°F | 35.3°F |
| Pori | 37.4°F | 35.2°F |
| Savolinna | 37.0°F | 35.6°F |
| Lappeenranta | 36.8°F | 35.4°F |
| Saariselka | 34.8°F | 33.8°F |
| Oulu | 34.6°F | 30.9°F |
| Vaasa | 34.5°F | 32.5°F |
| Seinajoki | 33.3°F | 31.6°F |
| Kemi | 32.3°F | 31.7°F |
Best time for vacation in Oulu
Oulu on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Oulu
Local time: 18:37
December 18, thursday
2100
34°F
NW
16 mph
16 mph
December 19, friday
0000
34°F
N
17 mph
17 mph
0300
37°F
NE
18 mph
18 mph
0600
36°F
NE
12 mph
12 mph
0900
34°F
NE
9 mph
9 mph
1200
32°F
N
7 mph
7 mph
1500
34°F
N
8 mph
8 mph
1800
36°F
NW
10 mph
10 mph
