Lake Hallwil vs Lake Sarnen
Lake Hallwil is the warmer swim right now at about 18.3°C. They are roughly 46 km apart in Switzerland.
Lake Hallwil
Aargau
mild · modelled estimate
- October average
- 18.3°C
- Warmest month
- August · 23.0°C
- Coldest month
- 4.0°C
- Swim season
- June–October
Lake Hallwil in Aargau, Switzerland reaches comfortable swimming temperatures in July and August, and drops close to single digits in winter.
Lake Sarnen
Obwalden
mild · modelled estimate
- October average
- 16.3°C
- Warmest month
- August · 20.0°C
- Coldest month
- 5.0°C
- Swim season
- July–September
Lake Sarnen in Obwalden, Switzerland is swimmable in high summer, brisk either side of it, and drops close to single digits in winter.
Month by month
| Lake | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lake Hallwil | 5.3°C | 4.0°C | 5.3°C | 8.8°C | 13.5°C | 18.3°C | 21.7°C | 23.0°C | 21.7°C | 18.3°C | 13.5°C | 8.8°C |
| Lake Sarnen | 6.0°C | 5.0°C | 6.0°C | 8.8°C | 12.5°C | 16.3°C | 19.0°C | 20.0°C | 19.0°C | 16.3°C | 12.5°C | 8.8°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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