What is the current flow on South Branch Au Sable River?

South Branch Au Sable River was running 222 cubic feet per second as of Aug 1, 2026, 6:30 PM UTC, measured at USGS gauge 04135700. 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 South Branch Au Sable River?

66.4°F (19.1°C) as of Aug 1, 2026, 6:30 PM UTC, at USGS gauge 04135700. South Branch Au Sable 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.

South Branch Au Sable River

Michigan. Streamflow and water-temperature readings from USGS gauges. Running 222 cfs as of Aug 1, 2026, 6:30 PM UTC.

Latest Reading

222

cubic feet / second

66.4°F

water temperature (19.1°C)

USGS gauge

Flow measured Aug 1, 2026, 6:30 PM UTC at gauge 04135700. Temperature measured Aug 1, 2026, 6:30 PM UTC at gauge 04135700. These are build-time snapshots, not a live feed — check the USGS gauge before relying on them.

USGS Gauges on South Branch Au Sable River

Gauge	Station	Water temp?
04135700	SOUTH BRANCH AU SABLE RIVER NEAR LUZERNE, MI	Yes

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Conditions: USGS NWIS (public domain).