Is it warm enough to swim in San Rafael in September? Average water temperature in San Rafael in September is 13.5°C and therefore is not suitable for comfortable swimming. The warmest water in San Rafael in September is 17°C, and the coldest is 9°C. To find out the water temperature today and in the coming days, go to Current water temperature in San Rafael
To get an accurate forecast for the water temperature in San Rafael for any chosen month, compare two years within a 10 year range using the chart below.
Day | 2025 | 2024 |
---|---|---|
1 September | 8°C | 9°C |
2 September | 9°C | 9°C |
3 September | 9°C | 9°C |
4 September | 9°C | 9°C |
5 September | 9°C | 10°C |
6 September | 9°C | 10°C |
7 September | 9°C | 10°C |
8 September | 10°C | 10°C |
9 September | 10°C | 11°C |
10 September | 11°C | 11°C |
11 September | 11°C | 11°C |
12 September | 11°C | 11°C |
13 September | 11°C | 12°C |
14 September | 11°C | 12°C |
15 September | 12°C | 12°C |
Day | 2025 | 2024 |
---|---|---|
16 September | 12°C | 12°C |
17 September | 13°C | 12°C |
18 September | 13°C | 13°C |
19 September | 14°C | 13°C |
20 September | 14°C | 12°C |
21 September | 14°C | 12°C |
22 September | 13°C | 12°C |
23 September | 13°C | 11°C |
24 September | 13°C | 12°C |
25 September | 14°C | 12°C |
26 September | 14°C | 12°C |
27 September | 13°C | 12°C |
28 September | 12°C | |
29 September | 13°C | |
30 September | 13°C |
You can also view information about water temperature for other months by clicking on the month button below