Grand River mouth trout and smallmouth in a fall transition

What's biting

What's next

With a New Moon today, light levels are low at night, so expect the best bite windows near first and last light. Water in the low 60s should keep cooling as nights lengthen. If that trend continues, smallmouth should slide off shallow flats toward rock and deeper edges, and tributary-bound trout typically become more active when river temperatures drop further.

Plan around the early morning hours, when cooler water and low light favor predatory fish. A slow, deliberate jig presentation near hard structure fits what Tactical Bassin describes for fall smallmouth. Flows near 1,330 cfs at gauge 04108660 mean current seams will be worth reading, so look for edges where faster water meets slower pockets.

Watch the gauges over the next few days. A flow rise would push fish to softer margins, while steady levels let fish settle into predictable lies. Check state regulations before harvesting anything, since seasons and limits vary by water.

Context

Mid-October on Lake Michigan tributaries and the Grand River mouth is typically the heart of fall movement. Water temperatures in the low 60s are on schedule for the season, neither early nor late. Baitfish gather near river mouths, and gamefish follow them as shallow summer patterns break down. Smallmouth begin to relocate toward deeper rock, while trout species become more tied to current and baitfish concentrations. Expect conditions to keep changing week to week as temperatures fall.