South Santiam River water temperature
South Santiam River, Lebanon, Oregon · River
The current water temperature at South Santiam River is 15.4 °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 137 data points since July 23, 2026.
Lowest recorded value: 11.6 °C on September 3, 2026 · highest value: 16.3 °C on July 23, 2026.
In September, temperatures have ranged between 11.6 °C and 15.7 °C.
The current value is 2.2 °C above the September average of this series.
Nearby waters
More measuring points: South Santiam River
Frequently asked questions
Can you swim at South Santiam River right now?
The current water temperature is 15.4 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at South Santiam River?
Currently 15.4 °C (updated continuously).
How warm is at South Santiam River in September?
In September, the water temperature recently averaged 13.2 °C.
When is the water warmest at South Santiam River?
Across the measurement record, July is on average the warmest month (15.9 °C).
