Average sea water temperature in April:
+35.7°F
| Minimum sea water temperature in April: | 46.8°F |
| Maximum sea water temperature in April: | 29.1°F |
Daily sea water temperature in April, °F
Show year:
2026
2025
2024
The average sea water temperature in April of 2026 was 37.1°F. The highest and lowest sea temperatures during the month were 41.0°F and 32.4°F.
Monthly sea water temperature in Kotka, °F
Which Finland resorts have warmest sea in April?
| Place name | April 2026 | April 2025 |
|---|---|---|
| Seinajoki | 38.4°F | 35.8°F |
| Turku | 38.4°F | 39.0°F |
| Vaasa | 37.7°F | 36.9°F |
| Espoo | 37.4°F | 39.7°F |
| Vantaa | 37.3°F | 39.1°F |
| Helsinki | 37.2°F | 39.3°F |
| Kotka | 37.1°F | 37.8°F |
| Oulu | 36.5°F | 32.0°F |
| Lahti | 36.5°F | 36.3°F |
| Pori | 36.3°F | 39.9°F |
| Lappeenranta | 36.3°F | 35.5°F |
| Porvoo | 36.0°F | 38.0°F |
| Savolinna | 34.8°F | 34.3°F |
| Juvaskyla | 32.9°F | 32.9°F |
| Saariselka | 32.6°F | 32.7°F |
| Imatra | 32.5°F | 33.6°F |
| Koli National Park | 32.1°F | 32.1°F |
| Kemi | 32.0°F | 31.8°F |
Best time for vacation in Kotka
Kotka on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Kotka
Local time: 11:38
April 28, tuesday
1200
39°F
S
19 mph
19 mph
1500
41°F
S
18 mph
18 mph
1800
41°F
S
14 mph
14 mph
2100
39°F
S
11 mph
11 mph
April 29, wednesday
0000
36°F
SE
11 mph
11 mph
0300
36°F
S
14 mph
14 mph
0600
32°F
SE
13 mph
13 mph
0900
36°F
S
13 mph
13 mph
