Grand River flows hold steady as Lake Michigan salmon season stirs

What's biting

What's next

With flow at the Grand River gauge holding near 1,570 cfs and nothing in the data suggesting a spike, conditions should stay stable into the weekend — a steady, wadeable flow that favors anglers working structure without fighting a fast rise. We don't have a temperature reading from this cycle, but early September on Lake Michigan typically sees surface temps easing down from summer highs, which is the trigger that starts pulling Chinook and coho salmon toward river mouths like the Grand.

If the pattern the WI DNR documented holds — 2024 was a record year for coho harvest and the best Chinook haul since 2012 — anglers working the river mouth and nearshore structure over the next couple of weeks should see staging fish build as water keeps cooling. Early September is usually the leading edge of that push rather than the peak, so trollers running stagger spreads off the pierheads and river mouth now are fishing ahead of the bulk of the run; expect the bite to sharpen through mid-to-late September as more fish stack up.

For bass anglers working the broader system, Fishing the Midwest's late-summer-to-fall notes are the most directly relevant piece of intel this cycle: as weeds begin dying back with cooling water, baitfish and the gamefish following them relocate to the healthiest remaining green weed edges. That's a pattern worth tracking over the next 1-2 weeks rather than a single-day window — locate live weed growth first, then fish it.

Weekend planning: with no wind or sky data available this cycle, check a local marine forecast before running out to the river mouth or nearshore structure, especially for a small-boat trip. Steelhead numbers are typically still light this early — most reports describe early-season steelhead as a trickle rather than a push, and that's the expectation here too until water temps drop further into September and October.

Chatter on Michigan Sportsman Forum shows anglers already looking ahead to the fall season on the northern Lake Michigan shoreline, though those posts aren't confirmed catch reports and should be read as anticipation rather than an active bite.

Context

September on Lake Michigan and the Grand River sits right at the front edge of the fall Chinook and coho run — on-schedule timing, not early or late, for salmon beginning to stage near tributary mouths as surface temps ease down from summer. The WI DNR's Lake Michigan Fishing Report gives useful season-over-season context: 2024 was a standout year lakewide, with anglers harvesting a record 210,000-plus coho salmon and over 160,000 Chinook, the largest Chinook harvest since 2012 — driven in part by strong alewife survival supporting stocked fish. That's a healthy baseline heading into this fall's run, though this cycle's intel doesn't include a confirmed report on how 2026's run is tracking against that mark.

Regionally, WI DNR has also been holding public meetings this year on lake whitefish total-allowable-catch limits and on smallmouth bass management in Green Bay and northern Lake Michigan, a sign the agency is actively managing pressure on both fisheries — worth knowing for anglers targeting either species this fall, and a reminder to check current regs before harvesting.

We don't have a direct water-temperature reading or a shop/charter report from the Grand River mouth area this cycle to say definitively whether the run is ahead of or behind a typical year — flow at the USGS gauge is the only current on-the-ground number available, and it doesn't speak to run timing on its own. Anglers with recent on-the-water time in the area would be the best gauge of exactly where this year's run stands relative to normal.