Where is the sea warmest in the Baltic in May?
In May the warmest sea in the Baltic is at Świnoujście, Poland, at 13.3°C. Nowhere in the region is comfortable for swimming this month — not one of the 90 cities measured reaches 19.0°C.
| # | City | Country | Sea | Swimming |
|---|---|---|---|---|
| 1 | Świnoujście | Poland | 13.3°C | Cold |
| 2 | Wolin | Poland | 13.3°C | Cold |
| 3 | Universitäts- und Hansestadt Greifswald | Germany | 12.9°C | Cold |
| 4 | Wolgast | Germany | 12.7°C | Cold |
| 5 | Halmstad | Sweden | 12.3°C | Cold |
| 6 | Faaborg | Denmark | 12.2°C | Cold |
| 7 | Sønderborg | Denmark | 12.1°C | Cold |
| 8 | Bergen auf Rügen | Germany | 12.1°C | Cold |
| 9 | Kappeln | Germany | 12.1°C | Cold |
| 10 | Vejle | Denmark | 12.1°C | Cold |
| 11 | Fredericia | Denmark | 12.1°C | Cold |
| 12 | Horsens | Denmark | 12.1°C | Cold |
| 13 | Oldenburg in Holstein | Germany | 12.0°C | Cold |
| 14 | Århus | Denmark | 12.0°C | Dangerous |
| 15 | Fehmarn | Germany | 11.9°C | Dangerous |
| 16 | Korsør | Denmark | 11.9°C | Dangerous |
| 17 | Gothenburg | Sweden | 11.7°C | Dangerous |
| 18 | Nykøbing Falster | Denmark | 11.6°C | Dangerous |
| 19 | Frederikshavn | Denmark | 11.6°C | Dangerous |
| 20 | Roskilde | Denmark | 11.5°C | Dangerous |
| 21 | Helsingborg | Sweden | 11.5°C | Dangerous |
| 22 | Sandefjord | Norway | 11.4°C | Dangerous |
| 23 | Tønsberg | Norway | 11.4°C | Dangerous |
| 24 | Moss | Norway | 11.4°C | Dangerous |
| 25 | Copenhagen | Denmark | 11.3°C | Dangerous |
Ranked on the NOAA OISST monthly climatology — a long-run average for May, not a forecast. A given May will run warmer or cooler than this, and the sea is warmest late in the afternoon and late in the season.