Lost River at Stateline Road, near Hatfield, California · River
The current water temperature at Lost River at Stateline Road is 15.2 °C (as of September 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.
Can you swim at Lost River at Stateline Road right now?
The current water temperature is 15.2 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Lost River at Stateline Road?
Currently 15.2 °C (updated continuously).