Water temperature in Ascona in May
Is it warm enough to swim in Ascona in May? Average water temperature in Ascona in May is 15.5°C and therefore is not suitable for comfortable swimming. The warmest water in Ascona in May is 23°C, and the coldest is 11°C. To find out the water temperature today and in the coming days, go to Current water temperature in Ascona
Changes water temperature in Ascona in May 2025, 2024
To get an accurate forecast for the water temperature in Ascona for any chosen month, compare two years within a 10 year range using the chart below.
You can choose any other years:
Day |
2025 |
2024 |
1 May | 12°C | 12°C |
2 May | 12°C | 12°C |
3 May | 12°C | 11°C |
4 May | 13°C | 12°C |
5 May | 13°C | 12°C |
6 May | 13°C | 12°C |
7 May | 13°C | 12°C |
8 May | 13°C | 12°C |
9 May | 13°C | 12°C |
10 May | 13°C | |
11 May | 13°C | 13°C |
12 May | 13°C | 13°C |
13 May | 13°C | 13°C |
14 May | 14°C | 13°C |
15 May | 14°C | 13°C |
Day |
2025 |
2024 |
16 May | 13°C | 13°C |
17 May | 14°C | 13°C |
18 May | 14°C | 13°C |
19 May | 14°C | 13°C |
20 May | 14°C | 14°C |
21 May | 15°C | 14°C |
22 May | 15°C | 14°C |
23 May | 14°C | 14°C |
24 May | 14°C | 14°C |
25 May | 15°C | 14°C |
26 May | 15°C | 14°C |
27 May | 15°C | 14°C |
28 May | 15°C | 15°C |
29 May | 15°C | 15°C |
30 May | 16°C | 15°C |
31 May | 16°C | 15°C |
Average water temperature in Ascona in May over a decade
2016 | 2017 | 2018 | 2019 | 2020 |
| 15.7°C | 16.5°C | 13.8°C | 17.3°C |
2021 | 2022 | 2023 | 2024 | 2025 |
14.2°C | 18.6°C | 16.7°C | 13.2°C | 13.8°C |
Ascona water temperature during other months:
You can also view information about water temperature for other months by clicking on the month button below