Columbia River at Cascade Island, Washington water temperature
Columbia River at Cascade Island, Washington · River
The current water temperature at Columbia River at Cascade Island is 21.0 °C (as of September 1, 2026, source: USGS).
A river can change temperature within hours — snowmelt, rain or power-plant operations show up immediately. That is why the measured value counts here, not an estimate.
21.0 °C
Nearby waters
Frequently asked questions
Can you swim at Columbia River at Cascade Island right now?
The current water temperature is 21.0 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Columbia River at Cascade Island?
Currently 21.0 °C (updated continuously).
