Marias River water temperature
Marias River, Highway 223 bridge near Chester, Montana · River
The current water temperature at Marias River is 8.6 °C (as of November 2, 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 485 data points since September 7, 2026.
Lowest recorded value: 6.6 °C on October 24, 2026 · highest value: 18.5 °C on September 18, 2026.
In November, temperatures have ranged between 8.5 °C and 9.1 °C.
The current value is 0.1 °C below the November average of this series.
Nearby waters
More measuring points: Marias River
Frequently asked questions
Can you swim at Marias River right now?
The current water temperature is 8.6 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Marias River?
Currently 8.6 °C (updated continuously).
How warm is at Marias River in November?
In November, the water temperature recently averaged 8.7 °C.
When is the water warmest at Marias River?
Across the measurement record, September is on average the warmest month (14.7 °C).
