Water temperature in Portland (OR) in August
Is it warm enough to swim in Portland in August? Average water temperature in Portland in August is 72.5°F and therefore suitable for comfortable swimming. The warmest water in Portland in August is 80.6°F, and the coldest is 64.4°F. To find out the water temperature today and in the coming days, go to Current water temperature in Portland
Changes water temperature in Portland in August 2025, 2024
To get an accurate forecast for the water temperature in Portland 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 |
|---|---|---|
| August 1 | 71.6°F | |
| August 2 | 71.6°F | 73.4°F |
| August 3 | 69.8°F | 73.4°F |
| August 4 | 69.8°F | |
| August 5 | 68°F | |
| August 6 | 68°F | 73.4°F |
| August 7 | 68°F | 73.4°F |
| August 8 | 69.8°F | 73.4°F |
| August 9 | 71.6°F | 71.6°F |
| August 10 | 73.4°F | |
| August 11 | 75.2°F | 71.6°F |
| August 12 | 75.2°F | |
| August 13 | 75.2°F | |
| August 14 | 75.2°F | 68°F |
| August 15 | 75.2°F | 68°F |
| Day | 2025 | 2024 |
|---|---|---|
| August 16 | 73.4°F | 68°F |
| August 17 | 71.6°F | 68°F |
| August 18 | 69.8°F | 68°F |
| August 19 | 69.8°F | 68°F |
| August 20 | 71.6°F | 68°F |
| August 21 | 73.4°F | 66.2°F |
| August 22 | 75.2°F | 64.4°F |
| August 23 | 77°F | 64.4°F |
| August 24 | 77°F | 64.4°F |
| August 25 | 80.6°F | 66.2°F |
| August 26 | 77°F | 64.4°F |
| August 27 | 77°F | 64.4°F |
| August 28 | 77°F | 66.2°F |
| August 29 | 75.2°F | 68°F |
| August 30 | 73.4°F | 69.8°F |
| August 31 | 73.4°F | 69.8°F |
Portland water temperature during other months:
You can also view information about water temperature for other months by clicking on the month button below
