BirdTroutOpen the map Au Sable River fishing report
56.1–64.8 °F across 8 gauges on the Au Sable River, read from USGS and re-read when this page loaded. No reporting stretch is in the cold band right now, so fish the first hours of light and the tributary mouths. September is Blue-Winged Olive, Cranefly, Green Rock Worm / Green Weenie and Caterpillar in this region — 17 insects are recorded as active.
Water temperature right now
| Gauge | Reading | July mean | Read at |
|---|---|---|---|
| Red Oak | 56.3 °F | 66.3 °F | 30 Sep 2026, 13:45 UTC |
| Mio | 57.6 °F | 70.0 °F | 30 Sep 2026, 13:45 UTC |
| Mc Kinley | 56.1 °F | 69.5 °F | 30 Sep 2026, 13:45 UTC |
| Curtisville | 57.4 °F | 71.8 °F | 30 Sep 2026, 13:15 UTC |
| South Branch | 60.4 °F | 74.0 °F | 30 Sep 2026, 13:45 UTC |
| Glennie | 60.6 °F | 74.1 °F | 30 Sep 2026, 13:45 UTC |
| Sidtown | 63.5 °F | 75.4 °F | 30 Sep 2026, 13:45 UTC |
| Au Sable | 64.8 °F | 75.5 °F | 30 Sep 2026, 13:30 UTC |
Read from USGS instantaneous values when this page was built, and rebuilt nightly. The colour is the same four-band scale the map paints from.
What is hatching in September
| Insect | Hook | Active at |
|---|---|---|
| Blue-Winged Olive | #16–22 | 38–58 °F |
| Cranefly | #6–10 | 40–65 °F |
| Green Rock Worm / Green Weenie | #10–14 | 45–68 °F |
| Caterpillar | #8–14 | 55–75 °F |
| Crayfish | #4–8 | 55–78 °F |
| Black Ant | #14–20 | 55–80 °F |
| Isonychia / Slate Drake | #10–14 | 55–70 °F |
| Leafhopper | #18–22 | 58–75 °F |
| Little Yellow May | #16–18 | 58–70 °F |
| Grasshopper | #8–12 | 60–80 °F |
| Trico | #20–24 | 58–72 °F |
| White Miller | #14–18 | 60–74 °F |
| Cinnamon Flying Ant | #16–20 | 58–78 °F |
| Cricket | #10–14 | 55–75 °F |
| Mahogany Dun | #16–18 | 45–58 °F |
| October Caddis | #8–10 | 45–58 °F |
| Water Boatman | #14–18 | 45–65 °F |
The rest of the state
This is one river. The Michigan report covers every region at once, and is refreshed at the same time as this page.
More about Au Sable River
Au Sable River — live water temperature, regulations and access
- Is the Au Sable River good for brook trout?
- Is the Au Sable River good for brown trout?
- Is the Au Sable River good for rainbow trout?
- When to fish the Au Sable River, Michigan
- How to get to the Au Sable River, Michigan
- Au Sable River fishing regulations