Water temperature in Lake Washington (WA) in July
Is it warm enough to swim in Lake Washington in July? Average water temperature in Lake Washington in July is 66.7°F and therefore is not suitable for comfortable swimming. The warmest water in Lake Washington in July is 75.2°F, and the coldest is 60.8°F. To find out the water temperature today and in the coming days, go to Current water temperature in Lake Washington
Changes water temperature in Lake Washington in July 2025, 2024
To get an accurate forecast for the water temperature in Lake Washington 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 |
|---|---|---|
| July 1 | 66.2°F | 62.6°F |
| July 2 | 66.2°F | 64.4°F |
| July 3 | 66.2°F | 66.2°F |
| July 4 | 66.2°F | 66.2°F |
| July 5 | 66.2°F | 68°F |
| July 6 | 66.2°F | 69.8°F |
| July 7 | 66.2°F | 71.6°F |
| July 8 | 66.2°F | 73.4°F |
| July 9 | 66.2°F | 75.2°F |
| July 10 | 68°F | 75.2°F |
| July 11 | 69.8°F | |
| July 12 | 69.8°F | |
| July 13 | 69.8°F | |
| July 14 | 71.6°F | |
| July 15 | 71.6°F |
| Day | 2025 | 2024 |
|---|---|---|
| July 16 | 71.6°F | |
| July 17 | 71.6°F | |
| July 18 | 69.8°F | |
| July 19 | 68°F | 69.8°F |
| July 20 | 68°F | |
| July 21 | 68°F | 69.8°F |
| July 22 | 66.2°F | 68°F |
| July 23 | 66.2°F | 68°F |
| July 24 | 66.2°F | 66.2°F |
| July 25 | 66.2°F | 66.2°F |
| July 26 | 66.2°F | 64.4°F |
| July 27 | 66.2°F | 64.4°F |
| July 28 | 66.2°F | 64.4°F |
| July 29 | 68°F | 64.4°F |
| July 30 | 68°F | 66.2°F |
| July 31 | 68°F | 68°F |
Lake Washington water temperature during other months:
You can also view information about water temperature for other months by clicking on the month button below
