Lake Constance vs Lake Walen

Lake Constance is the warmer swim right now at about 21.8°C. They are roughly 55 km apart in Germany and Switzerland.

Lake Constance

Baden-Württemberg

21.8°C

warm · modelled estimate

September average
21.8°C
Warmest month
August · 23.0°C
Coldest month
5.0°C
Swim season
June–October

Germany's biggest lake, shared with Austria and Switzerland, with dozens of strandbads.

Lake Walen

St. Gallen

19.0°C

mild · modelled estimate

September average
19.0°C
Warmest month
August · 20.0°C
Coldest month
5.0°C
Swim season
July–September

Lake Walen in St. Gallen, Switzerland is swimmable in high summer, brisk either side of it, and drops close to single digits in winter.

Month by month

LakeJanFebMarAprMayJunJulAugSepOctNovDec
Lake Constance6.2°C5.0°C6.2°C9.5°C14.0°C18.5°C21.8°C23.0°C21.8°C18.5°C14.0°C9.5°C
Lake Walen6.0°C5.0°C6.0°C8.8°C12.5°C16.3°C19.0°C20.0°C19.0°C16.3°C12.5°C8.8°C

Monthly values are modelled from each lake's long-term winter and summer envelope, then refined with today's forecast air temperature for the headline reading.

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