Average sea water temperature in April:
+32.4°F
| Minimum sea water temperature in April: | 37.6°F |
| Maximum sea water temperature in April: | 29.7°F |
Daily sea water temperature in April, °F
Show year:
2026
2025
2024
The average sea water temperature in April of 2026 was 32.1°F. The highest and lowest sea temperatures during the month were 32.4°F and 32.0°F.
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| Koli National Park |
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| Koli National Park |
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Monthly sea water temperature in Koli National Park, °F
Which Finland resorts have warmest sea in April?
| Place name | April 2026 | April 2025 |
|---|---|---|
| Seinajoki | 38.6°F | 35.8°F |
| Turku | 38.4°F | 39.0°F |
| Vaasa | 37.7°F | 36.9°F |
| Espoo | 37.6°F | 39.7°F |
| Vantaa | 37.5°F | 39.1°F |
| Helsinki | 37.3°F | 39.3°F |
| Kotka | 37.2°F | 37.8°F |
| Lahti | 36.8°F | 36.3°F |
| Oulu | 36.7°F | 32.0°F |
| Pori | 36.4°F | 39.9°F |
| Lappeenranta | 36.4°F | 35.5°F |
| Porvoo | 36.2°F | 38.0°F |
| Savolinna | 34.9°F | 34.3°F |
| Juvaskyla | 33.0°F | 32.9°F |
| Saariselka | 32.7°F | 32.7°F |
| Imatra | 32.6°F | 33.6°F |
| Kemi | 32.1°F | 31.8°F |
| Koli National Park | 32.1°F | 32.1°F |
Best time for vacation in Koli National Park
Koli National Park on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Koli National Park
Local time: 17:25
May 18, monday
1800
55°F
NE
2 mph
2 mph
2100
52°F
SE
2 mph
2 mph
May 19, tuesday
0000
52°F
SW
6 mph
6 mph
0300
52°F
SW
6 mph
6 mph
0600
52°F
SW
9 mph
9 mph
0900
57°F
W
12 mph
12 mph
1200
63°F
W
14 mph
14 mph
1500
66°F
W
14 mph
14 mph
