Willamette River water temperature
Willamette River, Eugene, Oregon · River
The current water temperature at Willamette River is 18.5 °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 433 data points since July 23, 2026.
Lowest recorded value: 15.4 °C on September 3, 2026 · highest value: 21.2 °C on August 13, 2026.
In September, temperatures have ranged between 15.4 °C and 19.7 °C.
The current value is 1.0 °C above the September average of this series.
Nearby waters
More measuring points: Willamette River
Frequently asked questions
Can you swim at Willamette River right now?
The current water temperature is 18.5 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Willamette River?
Currently 18.5 °C (updated continuously).
How warm is at Willamette River in September?
In September, the water temperature recently averaged 17.5 °C.
When is the water warmest at Willamette River?
Across the measurement record, August is on average the warmest month (18.5 °C).
