In July warmest sea in Finland is usually observed in the following locations: Oulu, Lahti, Lappeenranta.
Table below shows the average sea water temperature for marine resorts of Finland in July for the last three years.
| Place name | July 2025 | July 2024 | July 2023 |
|---|---|---|---|
| Oulu | 67.6°F | 65.5°F | 64.2°F |
| Lahti | 67.4°F | 67.9°F | 66.4°F |
| Lappeenranta | 67.1°F | 69.3°F | 66.0°F |
| Savolinna | 66.8°F | 68.0°F | 65.0°F |
| Imatra | 66.6°F | 66.8°F | 64.4°F |
| Juvaskyla | 66.2°F | 68.8°F | 65.2°F |
| Koli National Park | 65.8°F | 67.1°F | 64.7°F |
| Vaasa | 65.6°F | 66.1°F | 64.7°F |
| Kemi | 65.2°F | 65.4°F | 63.7°F |
| Seinajoki | 65.1°F | 64.1°F | 64.0°F |
| Pori | 65.0°F | 66.0°F | 65.2°F |
| Kotka | 64.6°F | 66.4°F | 61.6°F |
| Porvoo | 64.6°F | 66.1°F | 63.0°F |
| Turku | 64.0°F | 65.7°F | 64.4°F |
| Espoo | 63.3°F | 63.6°F | 59.7°F |
| Helsinki | 63.2°F | 63.6°F | 59.9°F |
| Vantaa | 62.8°F | 63.2°F | 59.5°F |
| Saariselka | 56.3°F | 57.4°F | 56.9°F |
Charts below show average sea water temperature for Finland resorts with the warmest sea in July.
You can also check other months of the year to see sea temperature of Finland resorts at that time.
Places in Finland:
Name
°F
