South Santiam River near Foster, Oregon water temperature

South Santiam River near Foster, Oregon · River

The current water temperature at South Santiam River near Foster is 11.7 °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.

11.7 °C

Measured: September 1, 2026 · continuously updated

💧 Water 11.7° · ☀️ Air 26.6°

Temperature trend of recent weeks

Measurement series & statistics

This measurement series includes 271 data points since July 3, 2026.

Lowest recorded value: 10.5 °C on July 10, 2026 · highest value: 12.3 °C on August 3, 2026.

Nearby waters

Wiley Creek near Foster, Oregon · 6.8 km away17.6 °C Middle Santiam River below Green Peter Dam near Foster, Oregon · 11.7 km away9.0 °C South Santiam River at Waterloo, Oregon · 14.4 km away14.4 °C South Santiam River below Cascadia, Oregon · 15.4 km away18.2 °C South Santiam River at Lebanon, Oregon · 21.2 km away14.5 °C

Frequently asked questions

Can you swim at South Santiam River near Foster right now?
The current water temperature is 11.7 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at South Santiam River near Foster?
Currently 11.7 °C (updated continuously).

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