Lake Geneva water temperature
Lake Geneva, Plage du Vengeron, Bellevue · Lido
The current water temperature at Lake Geneva is 20.4 °C (as of September 18, 2026, source: official monitoring networks).
Pools and lidos follow their own rules — heated, spring-fed or sun-dependent. Here the operator's on-site report is what counts.
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Water quality
EU classification: excellentMeasurement series & statistics
This measurement series includes 479 data points since July 20, 2026.
Lowest recorded value: 17.1 °C on August 21, 2026 · highest value: 27.9 °C on August 8, 2026.
In September, temperatures have ranged between 20.4 °C and 24.2 °C.
The current value is 1.8 °C below the September average of this series.
Nearby waters
More measuring points: Lake Geneva
Frequently asked questions
Can you swim at Lake Geneva right now?
The current water temperature is 20.4 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Lake Geneva?
Currently 20.4 °C (updated continuously).
How warm is at Lake Geneva in September?
In September, the water temperature recently averaged 22.2 °C.
When is the water warmest at Lake Geneva?
Across the measurement record, July is on average the warmest month (25.5 °C).
How is the water quality at Lake Geneva?
The official classification is: excellent.
