Otanlahti Sea Water Temperature
A cool beach on the Bothnian Sea, warmest around August at about 17.4°C. Today's reading, 7-day forecast, and monthly averages below.
Otanlahti water temperature
Wetsuit strongly recommended. Sudden entry may cause cold shock. Suitable only for brief, brisk plunges.
7-Day Water Temperature Forecast
Otanlahti Monthly Water Temperature Averages
Historical monthly climatology. The warmest water in Otanlahti occurs inJune, July, August, September — peaking at17.4°C (63.3°F) in August.
Year-Round Water Temperature Curve (°C / °F)
Hover a bar for detailsFull 12-month data table — min / avg / max & swimming comfort
| Month | Min Water Temp | Average Water Temp | Max Water Temp | Swimming Comfort |
|---|---|---|---|---|
| January | -0.3°C | 2°C | 4.1°C | Very Cold (< 16°C) |
| February | -0.6°C | 0.6°C | 2.5°C | Very Cold (< 16°C) |
| March | -0.3°C | 0.7°C | 2.4°C | Very Cold (< 16°C) |
| April | 0.3°C | 2.1°C | 4.3°C | Very Cold (< 16°C) |
| May | 0.4°C | 5.3°C | 10.3°C | Very Cold (< 16°C) |
| June | 5°C | 10.7°C | 15.9°C | Very Cold (< 16°C) |
| July | 11.6°C | 15.8°C | 19.3°C | Very Cold (< 16°C) |
| August | 14.7°C | 17.4°C | 19.3°C | Cool / Refreshing (16°C – 20°C) |
| SeptemberCurrent | 11.5°C | 14.3°C | 18°C | Very Cold (< 16°C) |
| October | 5.5°C | 10.2°C | 14.9°C | Very Cold (< 16°C) |
| November | 3.4°C | 6.7°C | 8.9°C | Very Cold (< 16°C) |
| December | 1.7°C | 4.1°C | 6.3°C | Very Cold (< 16°C) |
Swimming FAQs for Otanlahti
Is the sea warm enough to swim in Otanlahti today?
Typical sea surface temperature in Otanlahti this time of year is 14.3°C (57.7°F) — classified as Very Cold (< 16°C). Wetsuit strongly recommended. Sudden entry may cause cold shock. Suitable only for brief, brisk plunges. Live readings load automatically.
What are the warmest months for swimming in Otanlahti?
The highest water temperatures in Otanlahti typically occur duringJune, July, August, September, when monthly averages reach peak seasonal levels.
What is the typical water temperature in Otanlahti in September?
Historically in September, water temperatures in Otanlahti average around14.3°C (57.7°F), fluctuating between a recorded minimum of 11.5°C and a maximum of 18°C.