Average sea water temperature in May:
+44.9°F
| Minimum sea water temperature in May: | 59.5°F |
| Maximum sea water temperature in May: | 37.2°F |
Daily sea water temperature in May, °F
Show year:
2025
2024
2023
The average sea water temperature in May of 2025 was 46.3°F. The highest and lowest sea temperatures during the month were 52.3°F and 41.9°F.
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| Helsinki |
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Monthly sea water temperature in Helsinki, °F
Which Finland resorts have warmest sea in May?
| Place name | May 2025 | May 2024 |
|---|---|---|
| Lahti | 47.5°F | 49.8°F |
| Vaasa | 47.1°F | 45.3°F |
| Porvoo | 47.1°F | 48.2°F |
| Pori | 46.9°F | 44.8°F |
| Lappeenranta | 46.3°F | 50.3°F |
| Helsinki | 46.3°F | 46.4°F |
| Espoo | 46.2°F | 46.8°F |
| Vantaa | 46.0°F | 46.4°F |
| Turku | 45.7°F | 48.4°F |
| Kotka | 45.7°F | 48.1°F |
| Seinajoki | 45.2°F | 43.4°F |
| Juvaskyla | 43.8°F | 45.6°F |
| Savolinna | 43.1°F | 42.4°F |
| Imatra | 43.1°F | 45.3°F |
| Oulu | 39.1°F | 40.6°F |
| Koli National Park | 39.1°F | 40.8°F |
| Saariselka | 38.1°F | 38.1°F |
| Kemi | 37.6°F | 35.1°F |
Best time for vacation in Helsinki
Helsinki on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Helsinki
Local time: 14:58
December 24, wednesday
1500
30°F
SE
7 mph
7 mph
1800
30°F
SE
7 mph
7 mph
2100
30°F
E
7 mph
7 mph
December 25, thursday
0000
30°F
E
9 mph
9 mph
0300
32°F
E
11 mph
11 mph
0600
36°F
E
14 mph
14 mph
0900
37°F
E
15 mph
15 mph
1200
41°F
E
19 mph
19 mph
