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 9.0 °C (as of September 1, 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.

9.0 °C

Measured: September 1, 2026 · continuously updated

💧 Water 9.0° · ☀️ Air 24.2°

Temperature trend of recent weeks

Measurement series & statistics

This measurement series includes 280 data points since July 3, 2026.

Lowest recorded value: 7.5 °C on July 3, 2026 · highest value: 9.2 °C on August 31, 2026.

Nearby waters

South Santiam River below Cascadia, Oregon · 7.5 km away18.2 °C Wiley Creek near Foster, Oregon · 10.2 km away17.6 °C South Santiam River near Foster, Oregon · 11.7 km away11.7 °C Quartzville Creek near Cascadia, Oregon · 13.7 km away15.1 °C Middle Santiam River near Cascadia, Oregon · 16.0 km away17.8 °C

Frequently asked questions

Can you swim at Middle Santiam River below Green Peter Dam near Foster right now?
The current water temperature is 9.0 °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 9.0 °C (updated continuously).

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