Swimming in Helsinki in august 2025: Average sea temperature in august and tide times in august 2025
Average sea temperature in Helsinki in august 2025.
In august, according to seasonal norms, the sea temperature in Helsinki is:
Minimum: 62°F
Average: 66°F
Maximum: 70°F
Other useful seasonal weather averages in august:
- Outside temperature: 62°F to 68°F
- Most common weather: "Clear/Sunny"
- The wind blows at 10.6mph
- It rains a total of 4.3in, over 7 day(s).
Should we swim in Helsinki in august?
Yes... and no. The water temperature in Helsinki in august is cool
Swimming in august on the beaches of Helsinki is possible but the sea water is cool. So even though the sea temperature sometimes climbs to 70°F, it can also be as low as 62°F! Note that the average is 66°F.
Note also that in august, the climate is good with an average outside temperature of 65°F, 4.3in of precipitation (over 7 days) and 78.55 % humidity.
Water and normal seasonal temperatures in Helsinki in august
| 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 | ||
| Wind speed | 11.8mph | ||
| Wind temperature | 63°F | ||
| Precipitation | 4.3in | ||
| Number of days of rain | 7 jour(s) (22%) | ||
| Humidity | 79% | ||
| Visibility in kilometers | 9.58km | ||
| Cloud cover | 37% | ||
| Our opinion | cool swimming |
Chart of the tides in august 2025
Tide times in august 2025 in Helsinki
Swim elsewhere in Finland in august
| City | Average T° | Min. T° | Max. T° | Our opinion | Åland in august | 55°F | 75°F | freezing swimming | Kalajoki in august | 61°F | 66°F | cold swimming | Kotka in august | 66°F | 71°F | cool swimming | Oulu in august | 62°F | 65°F | cold swimming | Turku in august | 55°F | 75°F | freezing swimming | Vaasa in august | 62°F | 67°F | cold swimming |