Middle Santiam River below Green Peter Dam near Foster, Oregon water temperature
Middle Santiam River below Green Peter Dam near Foster, Oregon · River
The current water temperature at Middle Santiam River below Green Peter Dam near Foster is 10.6 °C (as of September 20, 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 295 data points since July 22, 2026.
Lowest recorded value: 7.5 °C on July 29, 2026 · highest value: 15.6 °C on September 20, 2026.
In September, temperatures have ranged between 8.6 °C and 15.6 °C.
The current value is 0.3 °C above the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Middle Santiam River below Green Peter Dam near Foster right now?
The current water temperature is 10.6 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Middle Santiam River below Green Peter Dam near Foster?
Currently 10.6 °C (updated continuously).
How warm is at Middle Santiam River below Green Peter Dam near Foster in September?
In September, the water temperature recently averaged 10.3 °C.
When is the water warmest at Middle Santiam River below Green Peter Dam near Foster?
Across the measurement record, September is on average the warmest month (10.3 °C).
