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Water temperature in Annecy (ARA) in September

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Is it warm enough to swim in Annecy in September? Average water temperature in Annecy in September is 17.6°C and therefore is not suitable for comfortable swimming. The warmest water in Annecy in September is 23°C, and the coldest is 11°C. Average high air temperature in Annecy in September is 21°C, and average low temperature is 10°C. To find out the water temperature today and in the coming days, go to Current water temperature in Annecy

Changes water temperature in Annecy in September 2025, 2024

To get an accurate forecast for the water temperature in Annecy for any chosen month, compare two years within a 10 year range using the chart below.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024
1 September18°C23°C
2 September18°C22°C
3 September18°C21°C
4 September18°C20°C
5 September18°C20°C
6 September18°C19°C
7 September18°C18°C
8 September18°C17°C
9 September18°C16°C
10 September18°C15°C
11 September18°C14°C
12 September17°C12°C
13 September17°C12°C
14 September17°C11°C
15 September17°C11°C
Day 2025 2024
16 September17°C11°C
17 September18°C12°C
18 September19°C13°C
19 September19°C14°C
20 September18°C14°C
21 September17°C14°C
22 September16°C14°C
23 September15°C15°C
24 September14°C15°C
25 September12°C14°C
26 September11°C14°C
27 September11°C13°C
28 September 13°C
29 September 13°C
30 September 13°C

Average water temperature in Annecy in September over a decade

20152016201720182019
16.2°C19.3°C15.2°C18.9°C18.4°C
20202021202220232024
18.2°C18°C16.9°C19.4°C15.1°C

Weather and climate in Annecy in September

This data display average monthly climate indicators in Annecy 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 temperature21°C
  • Average LOW temperature10°C
  • Average rainfall days9 days
  • Average rainfall4.9''/124mm
  • Average daylight13h
  • Average sunshine6.4h
  • Average UV index5

Annecy water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Where is the warm sea water in September?

Want to know where the water temperature in September is good for swimming? Select the continent of interest, the day of the month and the required water temperature

Region
Date (day and month)
Water temperature: min 16°C
 Average temperature  Maximum temperature

Annecy photo gallery

  • Soir d'été au bord du lac d'Annecy
  • Annecy
  • Annecy
  • Soir d'été au bord du lac d'Annecy

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Vote for Auvergne-Rhone-Alpes best beach

Annecy has a "Blue Flag" [1] award

Pebble beach

Dog-friendly place

This place is suitable for families with children

Annecy is equipped for disabled people

Current rating: 4,0 (6 votes cast)

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[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

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Our report for Annecy 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.

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