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

North Branch Au Sable River was running 227 cubic feet per second as of Aug 1, 2026, 5:45 PM UTC, measured at USGS gauge 04135800. 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 North Branch Au Sable River?

64°F (17.8°C) as of Aug 1, 2026, 5:45 PM UTC, at USGS gauge 04135800. North 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.

North Branch Au Sable River

Michigan. Streamflow and water-temperature readings from USGS gauges. Running 227 cfs as of Aug 1, 2026, 5:45 PM UTC.

Latest Reading

227

cubic feet / second

64°F

water temperature (17.8°C)

USGS gauge

Flow measured Aug 1, 2026, 5:45 PM UTC at gauge 04135800. Temperature measured Aug 1, 2026, 5:45 PM UTC at gauge 04135800. These are build-time snapshots, not a live feed — check the USGS gauge before relying on them.

USGS Gauges on North Branch Au Sable River

Gauge	Station	Water temp?
04135800	NB AU SABLE RIVER AT KELLOGGS BR NEAR LOVELLS, MI	Yes

Fly fishing rivers →Michigan lakes →

Conditions: USGS NWIS (public domain).