Lake Michigan salmon build behind a strong year class ahead of fall run

What's biting

What's next

No fresh buoy or river-gauge readings came through for this update, so the outlook below leans on typical early-August patterns for the Michigan side of Lake Michigan and the Grand River mouth rather than a day-over-day trend line — treat it as a seasonal guide until fresh readings post.

Over the next 2-3 days, expect salmon and steelhead to hold in their typical late-summer pattern: staged in deeper, cooler water offshore rather than pushing into the river mouth yet. The real shift to watch for is the start of the fall Chinook and coho run into tributaries like the Grand River, which historically begins ramping in late August and builds through September as water temperatures ease down from summer highs. Given the WI DNR Lake Michigan Fishing Report noting 2024 produced a record coho harvest and the best Chinook numbers since 2012 (helped by stronger alewife survival for stocked fish), this basin is entering the season with a healthy year-class behind it — a good sign once the river push starts.

Smallmouth bass should stay catchable through the period on classic post-spawn deep structure. Wired 2 Fish's August rundown notes bass nationwide are as deep as they get all year right now, which tracks for nearshore rock and drop-offs around the Grand River mouth — slow presentations worked tight to structure should keep producing. Walleye anglers should plan around the edges of the day; midday summer heat typically pushes walleye deep and less active, with dawn and dusk windows offering the better bite through this stretch.

For weekend planning: with no fall push confirmed yet, this weekend still favors offshore/deep-water trolling for salmon and structure fishing for smallmouth over targeting the river mouth itself. Anglers hoping to intercept the first wave of the fall run should start checking river-mouth conditions more closely as August closes out — that's typically when the first push of fish stages before the true run builds in September. Watch for state agency updates confirming once fish start showing at the river mouth in numbers.

Context

Early August on the Michigan side of Lake Michigan is transition season: summer offshore salmon trolling is still the primary pattern, and the fall run into tributaries like the Grand River typically hasn't started yet — that usually builds from late August into September as water cools. This stretch is generally a lull between the summer bite and the fall run, which is normal and on-schedule rather than early or late.

The clearest comparative data point in this pass comes from the WI DNR Lake Michigan Fishing Report, which highlighted that 2024 was a standout year for the fishery: anglers harvested a record number of coho salmon (over 210,000) and the most Chinook salmon since 2012, with recent strong alewife survival credited for boosting survival of stocked salmon and steelhead. That's a multi-year backdrop rather than a same-season comparison, but it suggests the fishery is entering this season with a solid base of fish behind it.

Beyond that, this pass didn't surface direct, current-season reports (charter logs, tackle-shop updates, or state creel data) specific to the Grand River mouth or nearshore Michigan waters to compare against a typical August. Rather than guess at a trend, it's worth being upfront: there's no fresh comparative signal here beyond the general seasonal pattern and the 2024 harvest context above. Check back as more local reports come in through August.