Columbia River at Bonneville Dam Forebay, Washington water temperature
Columbia River at Bonneville Dam Forebay, Washington · River
The current water temperature at Columbia River at Bonneville Dam Forebay is 20.2 °C (as of September 9, 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.
Measurement series & statistics
This measurement series includes 16 data points since September 7, 2026.
Lowest recorded value: 20.2 °C on September 8, 2026 · highest value: 20.4 °C on September 7, 2026.
Nearby waters
Frequently asked questions
Can you swim at Columbia River at Bonneville Dam Forebay right now?
The current water temperature is 20.2 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Columbia River at Bonneville Dam Forebay?
Currently 20.2 °C (updated continuously).
