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Warmest sea in Finland in May

52 coastal locations in Finland ranked by their typical May sea temperature. Region-wide average in May: 6.2°C. The top of the list is where to find the warmest swimming this month.

Warmest in May

Imatra

8.3°C May mean in Finland

Regional May average

6.2°C

across all 52 coastal locations in Finland

Vs annual mean

-1.7°C

below the year-round regional average

What the Finland sea feels like in May

This water is very cold and can cause pain. We don't recommend you swim in this temperature for anything other than very short swims of 5 to 10 minutes unless you are a very experienced cold water swimmer.

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 May fits in the year

May 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 May 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 May

Sorted by the typical May 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 May mean
1 Imatra 8.3°C
2 lake Saimaa 8.3°C
3 Hamina 7.8°C
4 Kotka 7.7°C
5 Pargas 7.7°C
6 Turku 7.7°C
7 Perna 7.6°C
8 Naantali 7.6°C
9 Länsi-Turunmaa Southwest Finland 7.5°C
10 Pohja 7.5°C
11 Porvoo 7.5°C
12 Inga 7.4°C
13 Merimasku 7.4°C
14 Rymattyla 7.4°C
15 Ekenaes 7.4°C
16 Laensi Turunmaa 7.4°C
17 Hanko 7.4°C
18 Espoo 7.3°C
19 Helsinki 7.3°C
20 Koukkuniemi 7.3°C
21 Otaniemi 7.3°C
22 Teekkarikylae 7.3°C
23 Tampere 7.3°C
24 Velkua 7.3°C
25 Nagu 7.3°C
Show 25 more ▸
26 Houtskar 7.2°C
27 Kustavi 7.2°C
28 Hango Hango 7.2°C
29 Inio 7.2°C
30 Särkisalo Southwest Finland 7.2°C
31 Ekenäs Uusimaa 7.1°C
32 Västanfjärd Southwest Finland 7.1°C
33 Aland Islands 6.9°C
34 Pyharanta 6.6°C
35 Rauma 6.6°C
36 Uusikaupunki 6.6°C
37 Pori 6.5°C
38 Kristinestad 6.4°C
39 Mariehamn 6.1°C
40 Kaskinen 6.0°C
41 Vaasa 4.6°C
42 Oravais 3.9°C
43 Haukipudas 2.8°C
44 Oulu 2.8°C
45 Kokkola 2.8°C
46 Kuivaniemi 2.8°C
47 Raahe 2.7°C
48 Kemi 2.7°C
49 Keminmaa 2.7°C
50 Pyhajoki 2.6°C

Coldest 10 in Finland in May

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

# Location May mean
1 Himanka 2.3°C
2 Kalajoki 2.3°C
3 Pyhajoki 2.6°C
4 Keminmaa 2.7°C
5 Kemi 2.7°C
6 Raahe 2.7°C
7 Kuivaniemi 2.8°C
8 Kokkola 2.8°C
9 Haukipudas 2.8°C
10 Oulu 2.8°C

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