In October sea water temperature all along the Lake Geneva coast is not yet warm enough for swimming and does not exceed 20°C. The warmest average water temperature Lake Geneva in October is 15.9°C (in Morges, Switzerland), and the coldest sea surface temperature is 15.8°C (in Sciez, France). To find out the water temperature today and in the coming days, go to Current water temperature of the Lake Geneva
This data on the average monthly surface water temperature on the Lake Geneva coast in October. To see the details, select the country and then the city of your interest. Besides water temperature, you can also get information about the weather for today, tomorrow and the upcoming days, surf forecast, as well as the data on sunrise/sunset and moonrise/moonset at a given point on any given day.