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Archived report. Published September 27, 2026 and superseded by a newer report. View the current report →
FreshwaterIowa · Upper Mississippi pools (Clinton-Dubuque)· September 27, 2026Active bite

Upper Mississippi walleye bite shifts as fall flow holds strong

USGS gauge 05420500 near Clinton logged 42,400 cfs and a 66°F water temperature Saturday night, numbers that place the Clinton-Dubuque pools in the heart of the early-fall transition. Fishing the Midwest's Mike Frisch reports that as remaining weed growth dies back this time of year, baitfish and the gamefish chasing them shift out of thinning summer beds toward whatever green vegetation is still holding oxygen and cover. A mid-60s reading like this one signals that relocation is underway.

CURRENT CONDITIONS
66°F
Water temp · 7-day
Full Moon
Moon phase
Gauge 05420500 running 42,400 cfs, a steady mid-fall flow keeping current moving through the pools
Tide / flow
Check local forecast before heading out
Weather

New to these readings? What water temp, tide, and moon phase mean for fishing →

What's biting

Active
Walleye
nightcrawler harness on a bottom-bouncer worked slow along breaklines
Active
Smallmouth Bass
target early-morning and late-evening feeding windows

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What's next

With flow holding above 42,000 cfs, current seams and eddies below wing dams and off river-mouth cuts should keep concentrating baitfish as water continues cooling through the week. Fishing the Midwest's standing fall walleye play, a nightcrawler harness on a bottom-bouncer worked slow along breaklines, should only get more productive as the transition deepens. Bass anglers can lean on Wired 2 Fish's timing note that predator activity concentrates in the early morning and late evening windows as days shorten into October.

Saturday's full moon adds a strong overnight feeding window worth planning around, particularly for low-light pushes at dawn and dusk this weekend.

Context

A 66°F reading in late September is on schedule for the Clinton-Dubuque stretch, right at the point where the pools shift from summer holding patterns into the fall feeding push that typically runs through October. Flow in the low-40,000 cfs range keeps current moderate, enough to concentrate structure-oriented fish without blowing out presentations. This reads as a normal, on-time transition for the region, not an early or late one.

Synthesized from real-time NOAA buoy data, USGS stream gauges, and current reports across regional fishing blogs, captain updates, and angler forums. Check local regulations before keeping fish. Never trust a single source for a trip decision.

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