Flathead River water temperature
Flathead River, Polson, Montana · River
The current water temperature at Flathead River is 8.5 °C (as of November 6, 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 521 data points since September 7, 2026.
Lowest recorded value: 8.5 °C on November 6, 2026 · highest value: 19.1 °C on September 7, 2026.
In November, temperatures have ranged between 8.5 °C and 9.7 °C.
The current value is 0.6 °C below the November average of this series.
Nearby waters
More measuring points: Flathead River
Frequently asked questions
Can you swim at Flathead River right now?
The current water temperature is 8.5 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Flathead River?
Currently 8.5 °C (updated continuously).
How warm is at Flathead River in November?
In November, the water temperature recently averaged 9.1 °C.
When is the water warmest at Flathead River?
Across the measurement record, September is on average the warmest month (17.2 °C).
