FishCondishGrayling, MI Fishing Report & Live Conditions
Grayling, MI fishing report
The Au Sable near Grayling is classic Michigan trout water, spring-fed and cold enough to hold fish year-round. Brown trout are the primary quarry throughout the main river corridor, with native brook trout more common in the smaller tributaries and upper reaches where the canopy is dense and temps stay coldest. Spring brings aggressive pre-spawn browns willing to chase streamers, summer fishing slows midday but picks up during evening hatches, and fall triggers the best dry-fly action of the year as browns stage and feed heavily before the spawn.
Fish hold in seams along current breaks, under undercut banks, and in the deeper bends where gravel transitions to silt. When water temps climb above 65°F, trout push into shaded runs and tributary mouths to find cooler water — target those spots at dawn. Elk Hair Caddis and Hex patterns match the river's famous hatches, while small Woolly Buggers and sculpin streamers produce browns in higher flows. Wade quietly, fish upstream, and keep a thermometer handy — cold stable flows in the 55–62°F range signal the most active feeding windows.
Grayling, MI river flow
The closest active USGS gauge to Grayling, MI is MANISTEE RIVER NEAR GRAYLING, MI (site 04123500), about 6.9 miles away. It drains roughly 123 square miles. Flow is the single best predictor of where fish sit in moving water, so it is worth knowing what normal looks like before you read today's number.
In August, this gauge typically runs about 170 cfs.
| Month | Median flow |
|---|---|
| Jan | 177 cfs |
| Feb | 173 cfs |
| Mar | 181 cfs |
| Apr | 215 cfs |
| May | 191 cfs |
| Jun | 180 cfs |
| Jul | 175 cfs |
| Aug | 170 cfs |
| Sep | 172 cfs |
| Oct | 179 cfs |
| Nov | 188 cfs |
| Dec | 185 cfs |
Median flow from the USGS daily-statistics record. For the live flow, gage height, water temperature, and today's fishing score, open the Grayling, MI dashboard.
What's biting near Grayling, MI
The species most likely to be feeding the Au Sable River: brown and brook trout. FishCondish grades every hour of the day for Grayling, MI and gives each species its own bite forecast, so you can see which window is worth fishing before you load the truck.
Grayling, MI fishing FAQ
What fish can you catch at Grayling, MI?
The species bite forecast for Grayling, MI covers what's likely feeding there, including brown and brook trout — and updates with the live conditions.
What's the best time of day to fish Grayling, MI?
Dawn and dusk are usually the most productive windows on the Au Sable River, particularly when the barometric pressure is steady or falling. FishCondish grades every hour of the day so you can pick the best one.
When is the best season to fish Grayling, MI?
Spring and fall are typically strongest on the Au Sable River as water temperatures sit in the productive range, with summer fishing best early and late in the day. It varies year to year, so check the live conditions before you head out.
How do I know if it's a good day to fish Grayling, MI?
FishCondish combines wind, water level, water temperature, pressure trend, and moon phase into a single 1–10 fishing score for Grayling, MI, updated in real time — a quick go/no-go read before you make the trip.
Fishing tips for Grayling, MI
New to these waters? Start with these beginner-friendly guides: