Waters · United States
Au Sable River (Mio) fishing report
Updated Friday, 9 October 2026 · refreshed automatically through the day
The Mio tailwater is the Au Sable's big-fish water: a trophy-regulated stretch of cold releases where night fishing with mouse patterns is a standard tactic rather than a novelty.
Today's report: excellent (84/100)
Brown Trout is the most promising species on Au Sable River (Mio) today. Water temperature at the gauge is 11.5°C (53°F) and barometric pressure is rising. Gauge AU SABLE RIVER AT MIO, MI shows the water level falling (0 cm/24h).
Au Sable River (Mio) water temperature and flow
- Water temperature: 11.5°C (53°F)
- Discharge: 26.2 m³/s (925 cfs) — down 1% over 24 hours
- Level trend: falling (0 cm/24h)
Measured at gauge AU SABLE RIVER AT MIO, MI · reading 17 min ago. Published by the national hydrological service, not estimated by us.
Best time to fish today
- 12:00–14:00 local time — score 83/100
- 00:00–02:00 local time — score 86/100
- 07:00–09:00 local time — score 86/100
3-day outlook by species
| Species | Friday 9 Oct | Saturday 10 Oct | Sunday 11 Oct |
|---|---|---|---|
| Brown Trout | 84 — excellent | 88 — excellent | 88 — excellent |
| Rainbow Trout | 81 — excellent | 79 — good | 78 — good |
| Brook trout | 82 — excellent | 82 — excellent | 71 — good |
Why this score
Cast & Scan uses a deterministic, published scoring model — no black box. The strongest influences on today's Au Sable River (Mio) rating:
- water temperature: helping (+1)
- solunar period: helping (+1)
- season: helping (+1)
- wind: helping (+0.9)
- precipitation: helping (+0.9)
- river flow: helping (+0.85)
Forecast computed Fri, 09 Oct 2026 14:01:46 GMT · data: Open-Meteo + gauge AU SABLE RIVER AT MIO, MI · refreshed automatically through the day · see our published accuracy
Wondering how this stacks up against the apps you already know? Cast & Scan vs Fishbrain vs BassForecast — an honest comparison, including where they beat us.
Read before you go
- Trout stream tactics, read through the forecast
- How river flow trend changes the bite
- Barometric pressure and fishing, explained
More brown trout waters
- Madison River (Ennis) — Montana, USA
- Lake Windermere — Lake District, England
- Lough Corrib — Galway, Ireland
- Animas River (Durango) — Colorado, USA
- Au Sable River (Foote Dam) — Michigan, USA
Nearby waters
- Au Sable River (Foote Dam) — Michigan, USA (61 km away)
- Manistee River (Tippy Dam) — Michigan, USA (150 km away)
- Muskegon River (Croton) — Michigan, USA (183 km away)
- White River (Whitehall) — Michigan, USA (214 km away)
- Grand River (Lower) — Michigan, USA (237 km away)
- Lake St. Clair — Michigan, USA (270 km away)