Today
71°F
Chance Rain Showers
SW 10 mph · 27% precip
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Today’s verdict
Conditions reported — a big 27°F swing through the day.
1,070 CFS+267Flow
57°F−1°1,070 CFS is well above its normal range for September — this stretch typically runs 528–763 CFS.
At flows like these, wading gets difficult and can turn dangerous — scout your access, cross carefully if at all, and check local conditions first. Conditions vary, and you are responsible for your own safety.
At 57°F, the water is in the prime range for trout — cold enough to fish and to handle fish safely.
Weather
66°F
Wind SW 8 mph
Sunrise 7:15 AM · Sunset 7:48 PM
Observed (2 hours ago)
NWS / weather.gov · fetched 15:00
Today
71°F
Chance Rain Showers
SW 10 mph · 27% precip
Tonight
45°F
Slight Chance Rain Showers then Patchy Fog
NW 0 to 10 mph · 16% precip
Tomorrow
72°F
Patchy Fog then Partly Sunny
NE 0 to 5 mph · 0% precip
Conditions are estimates from USGS data. Always assess on-site conditions and use your own judgment.
The gauge near Red Oak reads the Au Sable on the mainstem below Mio, downstream of the famous "Holy Water" fly-only reach around Grayling. It carries both flow and water temperature, so the read reflects the river's volume and warmth. We don't yet have a clean shop-report source for the Au Sable, so this page ships conditions only — the gauge and weather, without a fly list — until a usable source is curated.
Location
© OpenStreetMap contributors · © Geoapify
Helpful Links
Michigan fishing resources
Michigan’s classic cold-water river, known for cedar-lined channels, long pools and an influential dry-fly tradition. Target species include Brown, brook and rainbow trout. Excellent public access and canoe launches; wading varies by branch and substrate. Productive timing is Late April through June for major hatches, then summer evenings and fall streamer fishing. Major hatches and foods include Hendricksons, sulphurs, brown drakes, hex, isonychia, caddis and olives. Common approaches are Dry flies and emergers during hatches; night fishing, mice and streamers for larger browns. Regulations, access rules and water conditions vary by reach, so anglers should review current agency information and the linked local reports before fishing.
71° / 45°Weather