Columbia River at Cascade Island, Washington · River
The current water temperature at Columbia River at Cascade Island is 20.6 °C (as of July 18, 2026, source: USGS).
Can you swim at Columbia River at Cascade Island right now?
The current water temperature is 20.6 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Columbia River at Cascade Island?
Currently 20.6 °C (updated continuously).
How warm is at Columbia River at Cascade Island in July?
In July, the water temperature recently averaged 19.9 °C.