Tualatin River water temperature
Tualatin River, Oswego Dam, near West Linn, Oregon · River
The current water temperature at Tualatin River is 17.8 °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 140 data points since July 23, 2026.
Lowest recorded value: 17.8 °C on September 15, 2026 · highest value: 23.6 °C on July 23, 2026.
In September, temperatures have ranged between 17.8 °C and 21.1 °C.
The current value is 1.3 °C below the September average of this series.
Nearby waters
More measuring points: Tualatin River
Frequently asked questions
Can you swim at Tualatin River right now?
The current water temperature is 17.8 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Tualatin River?
Currently 17.8 °C (updated continuously).
How warm is at Tualatin River in September?
In September, the water temperature recently averaged 19.1 °C.
When is the water warmest at Tualatin River?
Across the measurement record, July is on average the warmest month (23.3 °C).
