Waters · United States
Au Sable River (Mio) fishing report
Updated Tuesday, 25 August 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: fair (50/100)
Brook trout is the most promising species on Au Sable River (Mio) today. Water temperature at the gauge is 16.5°C (62°F) and barometric pressure is stable. Gauge AU SABLE RIVER AT MIO, MI shows the water level falling (4 cm/24h).
Au Sable River (Mio) water temperature and flow
- Water temperature: 16.5°C (62°F)
- Discharge: 29.2 m³/s (1,031 cfs) — down 8% over 24 hours
- Level trend: falling (4 cm/24h)
Measured at gauge AU SABLE RIVER AT MIO, MI · reading 22 min ago. Published by the national hydrological service, not estimated by us.
Best time to fish today
- 08:00–10:00 local time — score 50/100
- 11:00–13:00 local time — score 47/100
- 07:00–09:00 local time — score 46/100
3-day outlook by species
| Species | Tuesday 25 Aug | Wednesday 26 Aug | Thursday 27 Aug |
|---|---|---|---|
| Brown Trout | 46 — fair | 45 — fair | 48 — fair |
| Rainbow Trout | 50 — fair | 46 — fair | 49 — fair |
| Brook trout | 50 — fair | 42 — fair | 43 — fair |
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:
- cloud cover: helping (+0.95)
- precipitation: helping (+0.9)
- river flow: helping (+0.85)
- wind: helping (+0.75)
- pressure trend: helping (+0.7)
- water temperature: helping (+0.65)
Forecast computed Tue, 25 Aug 2026 12:06:38 GMT · data: Open-Meteo + gauge AU SABLE RIVER AT MIO, MI · refreshed automatically through the day · see our published accuracy
Scan your exact spot
This page rates a representative point on Au Sable River (Mio). Bays, river mouths and depth changes can fish very differently — open the scanner, drop a pin on your exact swim and get a spot-specific forecast with tactics. Free, in the browser, no signup.
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.
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)