In August warmest sea in Baltic Sea is usually observed in the following locations: Tartu, Parnu, Narva.
Table below shows the average sea water temperature for marine resorts of Baltic Sea in August for the last three years.
| Place name | August 2026 | August 2025 | August 2024 |
|---|---|---|---|
| Tartu | 66.9°F | 67.9°F | 69.3°F |
| Parnu | 66.8°F | 67.0°F | 68.5°F |
| Narva | 66.2°F | 67.0°F | 68.3°F |
| Vyborg | 65.3°F | 68.0°F | 68.5°F |
| Toila | 65.2°F | 65.5°F | 67.9°F |
| Vasteras | 65.2°F | 66.0°F | 66.2°F |
| Sillamäe | 65.2°F | 65.5°F | 68.2°F |
| Saaremaa | 65.0°F | 66.0°F | 67.9°F |
| Lappeenranta | 64.9°F | 67.9°F | 68.4°F |
| Kunda | 64.7°F | 62.9°F | 67.6°F |
| Primorsk | 64.7°F | 68.1°F | 68.4°F |
| Lahti | 64.7°F | 67.2°F | 67.4°F |
| Stockholm | 64.6°F | 65.1°F | 64.6°F |
| Uppsala | 64.5°F | 66.0°F | 65.7°F |
| Tallinn | 64.2°F | 65.0°F | 67.3°F |
| Karlstad | 63.7°F | 64.9°F | 64.6°F |
| Orebro | 62.9°F | 64.4°F | 64.3°F |
| Turku | 62.9°F | 66.0°F | 65.2°F |
| Kotka | 61.2°F | 65.4°F | 67.4°F |
| Porvoo | 61.1°F | 64.7°F | 65.5°F |
| Helsinki | 60.2°F | 63.8°F | 65.3°F |
| Espoo | 59.9°F | 63.9°F | 65.0°F |
| Vantaa | 59.9°F | 63.6°F | 65.3°F |
Charts below show average sea water temperature for Baltic Sea resorts with the warmest sea in August.
You can also check other months of the year to see sea temperature of Baltic Sea resorts at that time.
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