Average sea water temperature in October:
+50.4°F
| Minimum sea water temperature in October: | 58.5°F |
| Maximum sea water temperature in October: | 43.0°F |
Daily sea water temperature in October, °F
Show year:
2026
2025
2024
The average sea water temperature in October of 2026 was 52.9°F. The highest and lowest sea temperatures during the month were 55.9°F and 49.5°F.
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| Helsinki |
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Monthly sea water temperature in Helsinki, °F
Which Finland resorts have warmest sea in October?
| Place name | October 2026 | October 2025 |
|---|---|---|
| Kotka | 53.6°F | 51.4°F |
| Vantaa | 53.1°F | 50.7°F |
| Helsinki | 52.9°F | 50.5°F |
| Espoo | 52.7°F | 50.5°F |
| Turku | 52.4°F | 52.0°F |
| Lahti | 52.3°F | 51.3°F |
| Savolinna | 51.5°F | 50.3°F |
| Juvaskyla | 51.3°F | 50.8°F |
| Porvoo | 50.9°F | 48.9°F |
| Lappeenranta | 50.9°F | 49.3°F |
| Imatra | 50.8°F | 49.5°F |
| Pori | 50.6°F | 48.1°F |
| Koli National Park | 50.6°F | 48.8°F |
| Vaasa | 48.2°F | 46.2°F |
| Seinajoki | 48.2°F | 46.0°F |
| Saariselka | 46.5°F | 45.7°F |
| Kemi | 46.2°F | 45.4°F |
| Oulu | 46.2°F | 44.9°F |
Best time for vacation in Helsinki
Helsinki on a weather map
Places in Finland:
Name
°F
24 Hours Forecast
Helsinki
Local time: 06:08
October 27, tuesday
0900
50°F
NE
15 mph
15 mph
1200
52°F
NE
16 mph
16 mph
1500
52°F
NE
15 mph
15 mph
1800
52°F
NE
16 mph
16 mph
2100
52°F
NE
17 mph
17 mph
October 28, wednesday
0000
52°F
NE
15 mph
15 mph
0300
50°F
NE
14 mph
14 mph
0600
50°F
N
13 mph
13 mph
