Flathead River near Polson, Montana water temperature

Flathead River near Polson, Montana · River

The current water temperature at Flathead River near Polson is 20.9 °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.

20.9 °C

Measured: September 1, 2026 · continuously updated

💧 Water 20.9° · ☀️ Air 16.5° · high today 26.5°

Temperature trend of recent weeks

Measurement series & statistics

This measurement series includes 227 data points since July 3, 2026.

Lowest recorded value: 15.4 °C on July 3, 2026 · highest value: 24.4 °C on August 1, 2026.

Nearby waters

Flathead River at Perma, Montana · 43.1 km away20.5 °C S F Flathead River above Twin C near Hungry Horse, Montana · 61.0 km away14.5 °C Clark Fork near Paradise, Montana · 62.6 km away17.8 °C Clark Fork at Superior, Montana · 72.3 km away16.9 °C Flathead River at Columbia Falls, Montana · 75.9 km away14.5 °C

Frequently asked questions

Can you swim at Flathead River near Polson right now?
The current water temperature is 20.9 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Flathead River near Polson?
Currently 20.9 °C (updated continuously).

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