
Is it warm enough to swim in Lac de Serre-Poncon in September? Average water temperature in Lac de Serre-Poncon in September is 17.9°C and therefore is not suitable for comfortable swimming. The warmest water in Lac de Serre-Poncon in September is 22°C, and the coldest is 12°C. To find out the water temperature today and in the coming days, go to Current water temperature in Lac de Serre-Poncon
To get an accurate forecast for the water temperature in Lac de Serre-Poncon for any chosen month, compare two years within a 10 year range using the chart below.
| Day | 2025 | 2024 |
|---|---|---|
| 1 September | 16°C | 21°C |
| 2 September | 16°C | 21°C |
| 3 September | 16°C | 20°C |
| 4 September | 17°C | 20°C |
| 5 September | 17°C | 19°C |
| 6 September | 17°C | 19°C |
| 7 September | 18°C | 18°C |
| 8 September | 17°C | 18°C |
| 9 September | 17°C | 17°C |
| 10 September | 17°C | 16°C |
| 11 September | 17°C | 15°C |
| 12 September | 17°C | 14°C |
| 13 September | 16°C | 13°C |
| 14 September | 16°C | 13°C |
| 15 September | 17°C | 13°C |
| Day | 2025 | 2024 |
|---|---|---|
| 16 September | 17°C | 13°C |
| 17 September | 18°C | 13°C |
| 18 September | 19°C | 14°C |
| 19 September | 19°C | 14°C |
| 20 September | 18°C | 14°C |
| 21 September | 18°C | 14°C |
| 22 September | 16°C | 14°C |
| 23 September | 15°C | 14°C |
| 24 September | 13°C | 14°C |
| 25 September | 12°C | 13°C |
| 26 September | 11°C | 13°C |
| 27 September | 11°C | 13°C |
| 28 September | 11°C | 12°C |
| 29 September | 12°C | 13°C |
| 30 September | 12°C | 13°C |
You can also view information about water temperature for other months by clicking on the month button below