What is the current flow on San Juan River?

San Juan River was running 707 cubic feet per second as of Aug 1, 2026, 6:00 PM UTC, measured at USGS gauge 09371010. This is a build-time snapshot rather than a live reading — check the USGS gauge directly before relying on it.

What is the water temperature on San Juan River?

75.6°F (24.2°C) as of Aug 1, 2026, 6:00 PM UTC, at USGS gauge 09371010. San Juan River carries no state trout classification, so the trout-stress thresholds do not apply to it — this is a water temperature measurement, not a fishery judgement.

San Juan River

Colorado. Streamflow and water-temperature readings from USGS gauges. Running 707 cfs as of Aug 1, 2026, 6:00 PM UTC.

Latest Reading

707

cubic feet / second

75.6°F

water temperature (24.2°C)

USGS gauges

Flow measured Aug 1, 2026, 6:00 PM UTC at gauge 09371010. Temperature measured Aug 1, 2026, 6:00 PM UTC at gauge 09371010. These are build-time snapshots, not a live feed — check the USGS gauge before relying on them.

USGS Gauges on San Juan River

Gauge	Station	Water temp?
09342500	SAN JUAN RIVER AT PAGOSA SPRINGS, CO	—
09346400	SAN JUAN RIVER NEAR CARRACAS, CO.	—
09371010	SAN JUAN RIVER AT FOUR CORNERS, CO	Yes

Fly fishing rivers →Colorado lakes →

Conditions: USGS NWIS (public domain).