Water temperature of the Baltic Sea in august Where to swim in the Baltic Sea in august 2025?

Several countries border the seaside of the Baltic Sea, including: Germany, Denmark, Estonia, Finland, Lapland, Latvia, Lithuania, Poland, Russia and Sweden. We measure the water temperature daily in these countries and archive it in order to calculate monthly averages, like those of the month of august.

The seasonal average for the water temperature in the month of august is between 55°F and 68°F. The lowest sea temperature measured this month is 34°F and the highest is 76°F.

The sea temperature map of the Baltic Sea in august

The map below presents a monthly average of the water temperature of the Baltic Sea for the month of august for several coastal cities. You can zoom and move around on the map. By clicking on the markers, you can see sea temperature details by city in august.