Rio Grande near Mercedes, Texas · River
The current water temperature at Rio Grande near Mercedes is 30.9 °C (as of July 18, 2026, source: USGS).
Can you swim at Rio Grande near Mercedes right now?
The current water temperature is 30.9 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Rio Grande near Mercedes?
Currently 30.9 °C (updated continuously).
How warm is at Rio Grande near Mercedes in July?
In July, the water temperature recently averaged 30.9 °C.