Cascade River water temperature
Cascade River, Marblemount, Washington · River
The current water temperature at Cascade River is 11.9 °C (as of September 21, 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 214 data points since July 23, 2026.
Lowest recorded value: 10.7 °C on August 3, 2026 · highest value: 15.5 °C on July 23, 2026.
In September, temperatures have ranged between 10.7 °C and 14.0 °C.
The current value is 0.5 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Cascade River right now?
The current water temperature is 11.9 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Cascade River?
Currently 11.9 °C (updated continuously).
How warm is at Cascade River in September?
In September, the water temperature recently averaged 12.4 °C.
When is the water warmest at Cascade River?
Across the measurement record, July is on average the warmest month (13.6 °C).
