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