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Warmest sea in Finland in October

52 coastal locations in Finland ranked by their typical October sea temperature. Region-wide average in October: 10.5°C. The top of the list is where to find the warmest swimming this month.

Warmest in October

Västanfjärd

11.8°C October mean in Finland

Regional October average

10.5°C

across all 52 coastal locations in Finland

Vs annual mean

+2.5°C

above the year-round regional average

What the Finland sea feels like in October

Water at this temperature is cold and will feel very cold initially, but the body will get used to it and longer swims are possible. Experienced swimmers can manage several hours of swimming, however hypothermia is still a real risk.

Finland monthly average 0.9°C to 17.3°C
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  • Warmest month August 17.3°C
  • Coldest month February 0.9°C
  • Annual mean 7.9°C
  • Months above 20°C 0 of 12

Where October fits in the year

October sits inside the regional pattern shown on the left. Pick a different month to see how the ranking shifts.

All twelve Finland month rankings:

Finland sea temperature map (live)

The map shows today's latest reading at every Finland location. The list below is based on the typical October mean, useful for trip planning weeks or months ahead.

Zoom in to see individual locations. Click a pin for water temperatures. View list →
°C -2 0 1 3 5 7 9 11 13 15 17 19 21 24 27 30 35

Top 50 warmest Finland locations in October

Sorted by the typical October mean built from a decade of daily readings at each location. Click any place for its 30-day chart, monthly profile, and full 10-year history.

# Location October mean
1 Västanfjärd Southwest Finland 11.8°C
2 Hango Hango 11.8°C
3 Särkisalo Southwest Finland 11.8°C
4 Hanko 11.7°C
5 Ekenaes 11.7°C
6 Ekenäs Uusimaa 11.6°C
7 Länsi-Turunmaa Southwest Finland 11.6°C
8 Inga 11.5°C
9 Pohja 11.4°C
10 Nagu 11.3°C
11 Espoo 11.3°C
12 Helsinki 11.3°C
13 Koukkuniemi 11.3°C
14 Otaniemi 11.3°C
15 Teekkarikylae 11.3°C
16 Kotka 11.3°C
17 Perna 11.2°C
18 Porvoo 11.2°C
19 Hamina 11.2°C
20 Merimasku 11.2°C
21 Rymattyla 11.2°C
22 Naantali 11.2°C
23 Pargas 11.2°C
24 Turku 11.2°C
25 Velkua 11.1°C
Show 25 more ▸
26 Tampere 11.1°C
27 Inio 11.0°C
28 Laensi Turunmaa 11.0°C
29 Houtskar 11.0°C
30 Kustavi 11.0°C
31 Imatra 10.9°C
32 lake Saimaa 10.9°C
33 Aland Islands 10.7°C
34 Pyharanta 10.5°C
35 Rauma 10.5°C
36 Uusikaupunki 10.5°C
37 Pori 10.4°C
38 Mariehamn 10.4°C
39 Kaskinen 10.0°C
40 Kristinestad 9.9°C
41 Oravais 8.7°C
42 Vaasa 8.6°C
43 Kalajoki 8.5°C
44 Himanka 8.5°C
45 Kokkola 8.4°C
46 Pyhajoki 8.3°C
47 Raahe 8.3°C
48 Keminmaa 8.3°C
49 Kemi 8.3°C
50 Kuivaniemi 8.0°C

Coldest 10 in Finland in October

Same data the other way. Helpful if you want to know which Finland coasts to avoid for swimming in October.

# Location October mean
1 Haukipudas 7.9°C
2 Oulu 7.9°C
3 Kuivaniemi 8.0°C
4 Kemi 8.3°C
5 Keminmaa 8.3°C
6 Raahe 8.3°C
7 Pyhajoki 8.3°C
8 Kokkola 8.4°C
9 Himanka 8.5°C
10 Kalajoki 8.5°C

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