Tongue River at Tongue River Dam near Decker, Montana · River
The current water temperature at Tongue River at Tongue River Dam near Decker is 19.8 °C (as of July 18, 2026, source: USGS).
Can you swim at Tongue River at Tongue River Dam near Decker right now?
The current water temperature is 19.8 °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 19.8 °C (updated continuously).
How warm is at Tongue River at Tongue River Dam near Decker in July?
In July, the water temperature recently averaged 19.6 °C.