Water temperature in Phoenix (AZ) in September
Is it warm enough to swim in Phoenix in September? Average water temperature in Phoenix in September is 89.4°F and therefore suitable for comfortable swimming. The warmest water in Phoenix in September is 98.6°F, and the coldest is 77°F. To find out the water temperature today and in the coming days, go to Current water temperature in Phoenix
Changes water temperature in Phoenix in September 2025, 2024
To get an accurate forecast for the water temperature in Phoenix 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 |
|---|---|---|
| September 1 | 84.2°F | 84.2°F |
| September 2 | 84.2°F | 84.2°F |
| September 3 | 84.2°F | 82.4°F |
| September 4 | 84.2°F | 82.4°F |
| September 5 | 84.2°F | 82.4°F |
| September 6 | 84.2°F | 82.4°F |
| September 7 | 84.2°F | 82.4°F |
| September 8 | 86°F | 82.4°F |
| September 9 | 84.2°F | 80.6°F |
| September 10 | 84.2°F | 80.6°F |
| September 11 | 82.4°F | 80.6°F |
| September 12 | 82.4°F | 80.6°F |
| September 13 | 82.4°F | 78.8°F |
| September 14 | 82.4°F | 78.8°F |
| September 15 | 82.4°F | 80.6°F |
| Day | 2025 | 2024 |
|---|---|---|
| September 16 | 82.4°F | 80.6°F |
| September 17 | 82.4°F | 77°F |
| September 18 | 82.4°F | 78.8°F |
| September 19 | 82.4°F | 78.8°F |
| September 20 | 82.4°F | 78.8°F |
| September 21 | 82.4°F | 77°F |
| September 22 | 80.6°F | 78.8°F |
| September 23 | 82.4°F | 78.8°F |
| September 24 | 82.4°F | 77°F |
| September 25 | 80.6°F | 77°F |
| September 26 | 80.6°F | 77°F |
| September 27 | 78.8°F | 77°F |
| September 28 | 77°F | |
| September 29 | 77°F | |
| September 30 | 77°F |
Phoenix water temperature during other months:
You can also view information about water temperature for other months by clicking on the month button below
