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.

Sea temperature

Tides

Sunrise and Sunset

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		17.6°C	17°C	19.5°C
29 September		17.5°C	16.9°C	19.3°C
30 September		17.4°C	16.9°C	19.3°C

Average water temperature in Lausanne in September over a decade

2015	2016	2017	2018	2019
19.5°C	20.9°C	19.1°C	21°C	20.2°C

2020	2021	2022	2023	2024
20.8°C	20°C	20.4°C	21.6°C	20.1°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

Temperature in neighboring cities

The nearest locations with the average water temperature in September. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

	Avr	Min	Max
Evian-les-Bains	20°C	16.9°C	23.6°C
Vevey	20.1°C	16.9°C	23.9°C
Bourg-en-Lavaux	20.1°C	16.9°C	23.9°C
Morges	20°C	16.8°C	23.6°C
Thonon-les-Bains	20°C	16.8°C	23.7°C
Excenevex	19.9°C	16.8°C	23.6°C
Anthy-sur-Leman	19.9°C	16.8°C	23.6°C
Sciez	19.9°C	16.8°C	23.6°C
Rolle	19.9°C	16.7°C	23.6°C
Nernier	19.9°C	16.7°C	23.6°C

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Our report for Lausanne is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

Region

Date (day and month)

Water temperature: min 16°C

Average temperature Maximum temperature