Is it warm enough to swim in Exeter in September? Average water temperature in Exeter in September is 15.7°C and therefore is not suitable for comfortable swimming. The warmest water in Exeter in September is 20°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 Exeter
To get an accurate forecast for the water temperature in Exeter for any chosen month, compare two years within a 10 year range using the chart below.
Day | 2025 | 2024 |
---|---|---|
1 September | 16°C | 17°C |
2 September | 16°C | 16°C |
3 September | 16°C | 16°C |
4 September | 16°C | 16°C |
5 September | 16°C | 16°C |
6 September | 16°C | 16°C |
7 September | 16°C | 15°C |
8 September | 15°C | 15°C |
9 September | 15°C | 14°C |
10 September | 15°C | 14°C |
11 September | 14°C | 13°C |
12 September | 14°C | 13°C |
13 September | 14°C | 12°C |
14 September | 14°C | 13°C |
15 September | 14°C | 12°C |
Day | 2025 | 2024 |
---|---|---|
16 September | 15°C | 13°C |
17 September | 15°C | 14°C |
18 September | 15°C | 15°C |
19 September | 15°C | 15°C |
20 September | 15°C | 16°C |
21 September | 14°C | 16°C |
22 September | 13°C | 16°C |
23 September | 12°C | 16°C |
24 September | 11°C | 15°C |
25 September | 11°C | 14°C |
26 September | 11°C | 13°C |
27 September | 13°C | |
28 September | 13°C | |
29 September | 13°C | |
30 September | 12°C |
You can also view information about water temperature for other months by clicking on the month button below