Photo: Leonhard Lenz · CC0
Water temperature in Finland
Baltic Sea 15.5 °C, Päijänne 13.8 °C, Pääjärvi 13.8 °C. The coldest spot is Kilpisjärvi at 9.1 °C. As of September 20, 2026, 42 locations from official monitoring networks.
15.5 °C
warmest spot · Baltic Sea, Hietaniemi (Helsinki)
9.1 °C
coldest · Kilpisjärvi
13.1 °C
average of all spots
42
locations
Swim now
The warmest spot of each kind of water
Lake
15.2 °C
Lohjanjärvi, Lohja
official monitoring networks · then Saimaa, Lappeenranta 15.0 °C and Ala-Rieveli, Heinola 14.7 °C
River
13.4 °C
Pielisjoki, Joensuu
official monitoring networks · then Tornionjoki, Kukkolankoski 10.4 °C and Oulankajoki, Kuusamo 10.0 °C
Coast
15.5 °C
Baltic Sea, Hietaniemi (Helsinki)
Open-Meteo marine model · then Baltic Sea, Naantali 15.2 °C and Baltic Sea, Hanko / Bellevue 15.0 °C
Regions
Finland, region by region
8 regions, each with today's range and its best-known spots. Tap one to open the region's list.
Baltic Sea13.1–15.5 °C
8 coasts & beaches
Baltic Sea, Hietaniemi (Helsinki) 15.5 °C · Baltic Sea, Naantali 15.2 °C · Baltic Sea, Hanko / Bellevue 15.0 °C
Päijänne13.8 °C
2 lakes
Päijänne, Sysmä 13.8 °C · Päijänne, Päijätsalo 13.8 °C
Pääjärvi12.9–13.8 °C
2 lakes
Pääjärvi, Lammi 13.8 °C · Pääjärvi, Karstula 12.9 °C
Lohjanjärvi15.2 °C
1 lakes
Lohjanjärvi, Lohja 15.2 °C
Saimaa15.0 °C
1 lakes
Saimaa, Lappeenranta 15.0 °C
Ala-Rieveli14.7 °C
1 lakes
Ala-Rieveli, Heinola 14.7 °C
Längelmävesi14.7 °C
1 lakes
Längelmävesi, Kangasala 14.7 °C
Kallavesi14.2 °C
1 lakes
Kallavesi, Kuopio 14.2 °C
Right now
42 spots, 3 kinds of water
31 lakes3 rivers8 coasts & beaches
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About the data
Beyond temperature, this page carries 9 official bathing-water ratings and wave height at 7 buoys.
All spots
By region, with today's reading
Baltic Sea8 spots
Päijänne2 spots
Päijänne, Sysmä13.8 °C
Päijänne, Päijätsalo13.8 °C
Pääjärvi2 spots
Pääjärvi, Lammi13.8 °C
Pääjärvi, Karstula12.9 °C
Lohjanjärvi1 spots
Lohjanjärvi, Lohja15.2 °C
Saimaa1 spots
Saimaa, Lappeenranta15.0 °C
Ala-Rieveli1 spots
Ala-Rieveli, Heinola14.7 °C
Längelmävesi1 spots
Längelmävesi, Kangasala14.7 °C
Kallavesi1 spots
Kallavesi, Kuopio14.2 °C
Other waters and lidos25 spots
Tuusulanjärvi, Tuusula14.2 °C
Pyhäjärvi, Säkylä14.2 °C
Näsijärvi, Kyrönlahti13.8 °C
Kuivajärvi, Tammela13.7 °C
Haukivesi, Oravi13.6 °C
Jääsjärvi, Hartola13.5 °C
Lappajärvi, Halkosaari13.5 °C
Pielinen, Nurmes13.4 °C
Pielisjoki, Joensuu13.4 °C
Kyyvesi, Haukivuori13.4 °C
Kitusjärvi, Virrat13.4 °C
Konnevesi13.3 °C
Hinjärvi, Närpiö13.2 °C
Nuasjärvi, Vuokatti12.7 °C
Oulujärvi, Manamansalo12.7 °C
Nilakka, Pielavesi12.5 °C
Pesiöjärvi, Suomussalmi12.0 °C
Oijärvi11.1 °C
Unari, Sodankylä10.9 °C
Tornionjoki, Kukkolankoski10.4 °C
Oulankajoki, Kuusamo10.0 °C
Ounasjärvi, Enontekiö9.9 °C
Inarijärvi, Nellim9.9 °C
Kevojärvi, Utsjoki9.2 °C
Kilpisjärvi9.1 °C
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