Swimming in Finland in august 2025 Sea temperature by city in august
Do you want to go to the beach in Finland in august 2025? Is it the right month to go for pleasant temperatures and staying in the water for a long time? The answer is on this page with the sea temperatures in august in Finland by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in Finland in august 2025
Here, find the average sea temperature in Finland in august in several coastal cities.
South in august
66°F
min: 62°F / max: 70°F
66°F
min: 61°F / max: 71°F
Ekenäs
65°F
min: 61°F / max: 70°F
Hamina
66°F
min: 62°F / max: 71°F
Hanko
65°F
min: 57°F / max: 71°F
Ingå
66°F
min: 61°F / max: 70°F
West Coast in august
55°F
min: 34°F / max: 75°F
55°F
min: 36°F / max: 75°F
62°F
min: 57°F / max: 67°F
Turku Archipelago (Abo Skargard)
55°F
min: 34°F / max: 76°F
Rauma
56°F
min: 37°F / max: 75°F
Jakobstad
61°F
min: 57°F / max: 67°F
Lapland in august
53°F
min: 50°F / max: 55°F
62°F
min: 59°F / max: 64°F
60°F
min: 57°F / max: 64°F
53°F
min: 50°F / max: 56°F
Honningsvåg
51°F
min: 49°F / max: 53°F
51°F
min: 50°F / max: 53°F
North in august
61°F
min: 57°F / max: 66°F
62°F
min: 59°F / max: 65°F
Haukipudas
61°F
min: 59°F / max: 65°F
Kuivaniemi
61°F
min: 58°F / max: 64°F
Pyhaejoki
62°F
min: 58°F / max: 66°F
Raahe
61°F
min: 57°F / max: 65°F
Where should you go swimming in Finland in the month of august?
Swimming in Finland in august is cool (in the best case scenario)
In august in Finland swimming conditions vary by city. Details below:
Swimming in august in Helsinki, Kotka, Ekenäs, Hamina, Hanko, Ingå, Kirkkonummi, Kristinestad, Porvoo and Vantaa is possible but the sea is generally cool. So though the sea temperature may sometimes reach 70°F, it can also go as low as 62°F. Note that the average is 66°F.
Swimming in august in Kalajoki, Kemi, Lulea, Oulu, Vaasa, Haukipudas, Jakobstad, Kokkola, Kuivaniemi, Oravais, Piteå, Pyhaejoki, Raahe and Tornio is possible... with a wetsuit! Indeed, the water is cold at this time of year with an average temperature of 61°F (min: 57°F/max: 66°F).
Forget about swimming in Åland, Alta, Tromso, Turku, Turku Archipelago (Abo Skargard), Honningsvåg, Kirkenes, Rauma, Båtsfjord, Hammerfest, Lakselv, Lyngseidet, Naantali, Pargas, Skjervoy, Storslett, Uusikaupunki, Vadsø and Vardø in august! The water temperature is freezing, reaching as low as 34°F (and only 75°F at the best of times). Our advice: plan on sightseeing, and don't bring your beach towel!
Where to go swimming in Finland in august: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in august
Helsinki
| August | |||
| Average sea temperature | 66°F | ||
| Minimum sea temperature | 62°F | ||
| Maximum sea temperature | 70°F | ||
| Average outside temperature | 67°F | ||
| Maximum outside temperature | 68°F | ||
| Minimum outside temperature | 63°F | ||
| Precipitation | 4.3in | ||
| Number of days of precipitation | 7 jour(s) (22%) | ||
| Cloud cover | 37% | ||
| Our opinion | cool swimming |
More information on swimming in Helsinki in august
Åland
| August | |||
| Average sea temperature | 55°F | ||
| Minimum sea temperature | 34°F | ||
| Maximum sea temperature | 75°F | ||
| Average outside temperature | 63°F | ||
| Maximum outside temperature | 65°F | ||
| Minimum outside temperature | 63°F | ||
| Precipitation | 3.4in | ||
| Number of days of precipitation | 6 jour(s) (18%) | ||
| Cloud cover | 36% | ||
| Our opinion | freezing swimming |
More information on swimming in Åland in august
Alta
| August | |||
| Average sea temperature | 53°F | ||
| Minimum sea temperature | 50°F | ||
| Maximum sea temperature | 55°F | ||
| Average outside temperature | 56°F | ||
| Maximum outside temperature | 58°F | ||
| Minimum outside temperature | 52°F | ||
| Precipitation | 2.6in | ||
| Number of days of precipitation | 4 jour(s) (12%) | ||
| Cloud cover | 58% | ||
| Our opinion | freezing swimming |
More information on swimming in Alta in august
Kalajoki
| August | |||
| Average sea temperature | 61°F | ||
| Minimum sea temperature | 57°F | ||
| Maximum sea temperature | 66°F | ||
| Average outside temperature | 61°F | ||
| Maximum outside temperature | 65°F | ||
| Minimum outside temperature | 59°F | ||
| Precipitation | 3.8in | ||
| Number of days of precipitation | 6 jour(s) (21%) | ||
| Cloud cover | 41% | ||
| Our opinion | cold swimming |
More information on swimming in Kalajoki in august
Kemi
| August | |||
| Average sea temperature | 62°F | ||
| Minimum sea temperature | 59°F | ||
| Maximum sea temperature | 64°F | ||
| Average outside temperature | 61°F | ||
| Maximum outside temperature | 63°F | ||
| Minimum outside temperature | 58°F | ||
| Precipitation | 4.5in | ||
| Number of days of precipitation | 7 jour(s) (23%) | ||
| Cloud cover | 42% | ||
| Our opinion | cold swimming |
More information on swimming in Kemi in august
List of coastal cities in Finland
| Helsinki in august | cool swimming |
| Åland in august | freezing swimming |
| Alta in august | freezing swimming |
| Kalajoki in august | cold swimming |
| Kemi in august | cold swimming |
| Kotka in august | cool swimming |
| Lulea in august | cold swimming |
| Oulu in august | cold swimming |
| Tromso in august | freezing swimming |
| Turku in august | freezing swimming |
| Vaasa in august | cold swimming |
| Turku Archipelago (Abo Skargard) in august | freezing swimming |
| Honningsvåg in august | freezing swimming |
| Kirkenes in august | freezing swimming |
| Rauma in august | freezing swimming |
| Båtsfjord in august | freezing swimming |
| Ekenäs in august | cool swimming |
| Hamina in august | cool swimming |
| Hammerfest in august | freezing swimming |
| Hanko in august | cool swimming |
| Haukipudas in august | cold swimming |
| Ingå in august | cool swimming |
| Jakobstad in august | cold swimming |
| Kirkkonummi in august | cool swimming |
| Kokkola in august | cold swimming |
| Kristinestad in august | cool swimming |
| Kuivaniemi in august | cold swimming |
| Lakselv in august | freezing swimming |
| Lyngseidet in august | freezing swimming |
| Naantali in august | freezing swimming |
| Oravais in august | cold swimming |
| Pargas in august | freezing swimming |
| Piteå in august | cold swimming |
| Porvoo in august | cool swimming |
| Pyhaejoki in august | cold swimming |
| Raahe in august | cold swimming |
| Skjervoy in august | freezing swimming |
| Storslett in august | freezing swimming |
| Tornio in august | cold swimming |
| Uusikaupunki in august | freezing swimming |
| Vadsø in august | freezing swimming |
| Vantaa in august | cool swimming |
| Vardø in august | freezing swimming |