Smallmouth shift deeper as fall turnover hits the pools

What's next

Expect the seasonal shift to keep building through the week. As surface water continues cooling, smallmouth on these pools typically slide off shallow rock and wing dams toward the nearest deeper break, following baitfish making the same move. That's the pattern Wired 2 Fish describes playing out on clear-water smallmouth lakes farther west, where fish pushed out to deeper structure once temperatures dropped into the 40s — a useful cue for switching from shallow-structure approaches to deeper vertical presentations as these pools continue cooling.

Tonight's full moon is worth building an early-morning or dusk trip around; low light around new and full moons is consistently when bass feed most aggressively, per Wired 2 Fish's rundown on bass timing. Prioritize dawn and last light over midday hours heading into the weekend.

Context

Late September sits at the front edge of fall turnover on Upper Mississippi backwaters and main-channel pools, a transition that typically runs through October as water cools and weed cover thins. That puts this stretch on a normal seasonal clock for the region — not early, not late. The bite typically keeps shifting from summer weed-edge patterns toward structure- and depth-based presentations as the season progresses.