Tongue River at Tongue River Dam near Decker, Montana water temperature
Tongue River at Tongue River Dam near Decker, Montana · River
The current water temperature at Tongue River at Tongue River Dam near Decker is 22.6 °C (as of August 31, 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 244 data points since July 9, 2026.
Lowest recorded value: 18.0 °C on July 9, 2026 · highest value: 23.7 °C on August 25, 2026.
Nearby waters
Frequently asked questions
Can you swim at Tongue River at Tongue River Dam near Decker right now?
The current water temperature is 22.6 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Tongue River at Tongue River Dam near Decker?
Currently 22.6 °C (updated continuously).
