Michigan · United States

Au Sable River MI fishing forecast

45 Fair of 100

Au Sable River MI is a freshwater fishing spot in Michigan, United States. Anglers here target Brown Trout, Rainbow Trout, Brook Trout. The most productive months are typically April, May, June, July, August, September.

Quick answer

Best monthsApril, May, June, July

Top speciesBrown Trout, Rainbow Trout, Brook Trout

Score now45/100

Local rulesUnited States — Federal Waters

Today’s verdict

Ranks #638 of 644 spots FishRadar scored worldwide today

Trending down — 24 points below this spot’s 7-day average

Score confidence ±12 points, from 6 live signals

The statistical model disagrees with the physics model here today — treat this score with extra caution.

Helping the score most

Water temperature+15.0Barometric pressure+4.4Thermocline+3.0

Pressure trend

Pressure stable — fish feeding on their usual rhythm

Current conditions

Sea surface temp	19.2 °C
Wind	26 km/h from NW, gusting 53 km/h
Pressure	1012 hPa
Cloud cover	15%
Chlorophyll	26.31 mg/m³
Salinity	0.0 PSU
UV index	3
Wind sea	0.0 m
Ground swell	0.0 m at 0 s

River gauge: AU SABLE RIVER NEAR RED OAK, MI (3 km): 1070 cfs, steady

The water is running true to season — within a few tenths of the August average of 19.2 °C for this location. The water is mixed to about 20.0 m, with the thermocline below that.

Updated 1 h ago.

What the score means at Au Sable River MI

Au Sable River MI currently scores 45 out of 100 (Fair). Water temperature is 19.2 °C. 6 forecast signals are active in this score.

Water temperature +15.0: how close the water is to this species mix’s comfort band
Barometric pressure +4.4: falling pressure often triggers feeding
Thermocline +3.0: a defined layer stacks fish at one depth
Pre-storm bite +2.4: the classic feed before heavy weather
Moon phase +2.0: lunar feeding rhythm
Solunar period +1.3: sun–moon alignment feeding windows

What’s biting now

The model expects today: common-carp, european-carp-entry, lake-sturgeon, atlantic-sturgeon, white-perch, golden-trout, rock-bass, brown-bullhead

[object Object], [object Object] — Protected here — release immediately

Bite windows

Moon

Waxing Gibbous · 82% lit

Solunar day rating

50 / 100

Best months for Au Sable River MI:

Score history at this spot

7 days tracked at this exact location

Best recent day: 2026-07-30, 77/100

1 day(s) at 70+ in the tracked period

About this spot

Water type

River · Freshwater

Rivers are flow-driven. Fish the seams, eddies, and structure where current breaks, where fish hold to conserve energy and ambush bait.

Access & shore

Fishable from shore · estuary

What you can catch

Brown Trout

Salmo trutta
Rainbow Trout

Oncorhynchus mykiss
Brook Trout

Salvelinus fontinalis

Best months by species at Au Sable River MI

Brown TroutSalmo trutta
Rainbow TroutOncorhynchus mykiss
Brook TroutSalvelinus fontinalis

Typical months; local seasons and closures apply.

Local regulations

U.S. federal fisheries authority

United States — Federal Waters

Licensing:

saltwater-recreational — residents Federal Recreational Fishing License may be required in addition to state license when fishing federal (EEZ) waters., non-residents Same as residents. Many states require their own license even in federal waters.

FishRadar regulations are summaries only. Federal and state waters rules overlap — always verify current federal and state agency rules before fishing.