Water temperature in Lausanne in September
Is it warm enough to swim in Lausanne in September? Average water temperature in Lausanne in September is 20.1°C and therefore suitable for comfortable swimming. The warmest water in Lausanne in September is 23.8°C, and the coldest is 16.9°C. Average high air temperature in Lausanne in September is 20°C, and average low temperature is 13°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Lausanne
Changes water temperature in Lausanne in September 2025, 2024
To get an accurate forecast for the water temperature in Lausanne for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Lausanne, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of September.
You can choose any other years:
| Day | 2025 | 2024 | Min | Max |
|---|---|---|---|---|
| 1 September | 21.4°C | 23.3°C | 19.3°C | 23.5°C |
| 2 September | 20.3°C | 23.6°C | 19.6°C | 23.6°C |
| 3 September | 20.4°C | 23.3°C | 19.5°C | 23.3°C |
| 4 September | 20.8°C | 23.1°C | 19.1°C | 23.1°C |
| 5 September | 21.1°C | 22°C | 19.1°C | 23°C |
| 6 September | 21.1°C | 22°C | 19.1°C | 22.7°C |
| 7 September | 20.9°C | 21.9°C | 19.1°C | 22.2°C |
| 8 September | 20.7°C | 21.6°C | 19.2°C | 22.4°C |
| 9 September | 20.5°C | 21.8°C | 19.5°C | 22.6°C |
| 10 September | 20.6°C | 20.8°C | 19.6°C | 23°C |
| 11 September | 19.6°C | 20.6°C | 19.4°C | 23.8°C |
| 12 September | 19.7°C | 20.4°C | 19.3°C | 23.2°C |
| 13 September | 19.5°C | 20.1°C | 18.7°C | 22.8°C |
| 14 September | 20.5°C | 20°C | 18.5°C | 22.5°C |
| 15 September | 20.8°C | 19.9°C | 18.4°C | 23°C |
| Day | 2025 | 2024 | Min | Max |
|---|---|---|---|---|
| 16 September | 20.4°C | 19.8°C | 18.4°C | 22.6°C |
| 17 September | 19.9°C | 19.8°C | 18.2°C | 22.3°C |
| 18 September | 19.5°C | 19.7°C | 17.8°C | 22°C |
| 19 September | 20.2°C | 19.6°C | 17.8°C | 21.7°C |
| 20 September | 20°C | 19.5°C | 17.8°C | 21.8°C |
| 21 September | 19.8°C | 19.2°C | 17.5°C | 21.4°C |
| 22 September | 19.5°C | 19°C | 17.4°C | 21°C |
| 23 September | 19.2°C | 18.7°C | 17.2°C | 21.4°C |
| 24 September | 19°C | 18.4°C | 17.1°C | 20.9°C |
| 25 September | 18.7°C | 18.2°C | 17°C | 20.5°C |
| 26 September | 18.4°C | 17.9°C | 17°C | 20°C |
| 27 September | 19.3°C | 17.7°C | 16.9°C | 19.8°C |
| 28 September | 18.9°C | 17.6°C | 17°C | 19.5°C |
| 29 September | 18.6°C | 17.5°C | 16.9°C | 19.3°C |
| 30 September | 18.4°C | 17.4°C | 16.9°C | 19.3°C |
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Average water temperature in Lausanne in September over a decade
| 2016 | 2017 | 2018 | 2019 | 2020 |
| 20.9°C | 19.1°C | 21°C | 20.2°C | 20.8°C |
| 2021 | 2022 | 2023 | 2024 | 2025 |
| 20°C | 20.4°C | 21.6°C | 20.1°C | 19.9°C |
Weather and climate in Lausanne in September
This data display average monthly climate indicators in Lausanne in September based on our historical weather readings over a period of ten years. In addition to temperature, we include data on the number of rainy and sunny days so you can have all the information about your destination before your trip
- Average HIGH temperature20°C
- Average LOW temperature13°C
- Average humidity
73 - Average rainfall days9 days
- Average rainfall4.5''/114mm
- Average daylight13h
- Average sunshine6.1h
- Average UV index5
Lausanne water temperature during other months:
You can also view information about water temperature for other months by clicking on the month button below
