Lac de Gerardmer vs Lake Bostalsee
Lake Bostalsee is the warmer swim right now at about 18°C. They are roughly 165 km apart in France and Germany.
Lac de Gerardmer
Vosges
mild · modelled estimate
- October average
- 17.5°C
- Warmest month
- August · 22.0°C
- Coldest month
- 4.0°C
- Swim season
- July–September
Lac de Gerardmer in Vosges, France reaches comfortable swimming temperatures in July and August, and drops close to single digits in winter.
Lake Bostalsee
Saarland
mild · modelled estimate
- October average
- 18.0°C
- Warmest month
- August · 23.0°C
- Coldest month
- 3.0°C
- Swim season
- June–October
Lake Bostalsee in Saarland, Germany reaches comfortable swimming temperatures in July and August, and drops close to single digits in winter.
Month by month
| Lake | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lac de Gerardmer | 5.2°C | 4.0°C | 5.2°C | 8.5°C | 13.0°C | 17.5°C | 20.8°C | 22.0°C | 20.8°C | 17.5°C | 13.0°C | 8.5°C |
| Lake Bostalsee | 4.3°C | 3.0°C | 4.3°C | 8.0°C | 13.0°C | 18.0°C | 21.7°C | 23.0°C | 21.7°C | 18.0°C | 13.0°C | 8.0°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.
Related lake comparisons
Want a different mix? Compare up to four lakes side by side or browse all lake water temperatures.
Explore every sea temperature page
Jump straight to a country, coastal region, city, seasonal ranking or comparison.