Grand River steelhead tailing off as Great Lakes smallmouth move shallow

What's Biting

What's Next

Over the next two to three days, the Grand River's flow near 4,040 cfs is likely to remain fishable for steelhead. As snowmelt contributions from the upper watershed taper, flows traditionally begin easing in late May — if levels pull back toward the 2,500–3,500 cfs range, late-running fish holding in the lower river near the Grand Haven mouth will concentrate on deeper seams and channel edges, making them more accessible to drifting presentations. Classic late-season approaches — spawn sacs, beads in egg tones, or small streamer patterns — remain the go-to rigs at this stage. The waxing crescent moon through this week means the loudest feeding windows will likely align with first light and the last hour before dark rather than any overnight push.

The more significant shift this week belongs to bass. Tactical Bassin highlights that the bluegill spawn is in full swing across Great Lakes fisheries — one of the most reliable feeding triggers on the calendar. Smallmouth and largemouth bass move aggressively into the shallows to intercept bluegill and capitalize on spawning concentrations. In the Grand River estuary and the nearshore Lake Michigan zone, look for smallmouth on rocky points, gravel bars, and hard-bottom transitions as fish approach or complete spawning themselves. Shallow crankbaits, tube jigs, and finesse drop-shots around boulders and dock structure are high-percentage plays during this window.

For salmon anglers, late May is the bridge period before summer's primary Chinook fishery ignites. The WI DNR Lake Michigan Fishing Report's documentation of outsized 2024 returns — tied directly to strong alewife forage classes — points to a healthy staging population in the southern lake basin. Trolling copper or leadcore lines pulling spoons in 60–120 feet of water off the river mouth and nearshore structure is the traditional approach as Chinook begin pre-summer staging. Expect this bite to build steadily through June.

One variable worth watching: lake surface temperature and wind direction. Persistent westerly winds off Lake Michigan can push cold nearshore water toward shore, temporarily suppressing shallow bass and nearshore salmon activity. Conversely, easterly winds and warming afternoons can stack baitfish near the river plume and concentrate feeding fish. Check local forecast and wind projections before settling on a zone — the difference between a flat morning and an active bite near the river mouth can often be read in the wind the evening before.

Context

Mid-May at the Grand River mouth and Lake Michigan shoreline represents one of the most layered fishing transitions on the Michigan calendar. The spring steelhead run — which typically peaks in March and April — is now in its closing chapter, with the last fish completing their spawning cycle in the lower river and staging near the mouth before dispersing back into the lake. Flows near 4,000 cfs are consistent with normal to slightly elevated late-spring conditions for this watershed; the Grand River drains a large portion of west-central Michigan and carries elevated spring volumes that can persist into May in wet years.

For broader Lake Michigan context, the WI DNR Lake Michigan Fishing Report provides a useful recent benchmark: record coho harvests topping 210,000 fish in 2024 and the strongest Chinook returns since 2012 were attributed to robust alewife year classes that improved stocked fish survival rates through the critical early period. If those forage populations have held into 2026, the foundation for another strong summer salmon season is intact — though current-year stocking and survival data would be needed to confirm where this season stands.

Smallmouth bass spawning at this latitude typically occurs when surface temperatures climb into the 60–65°F range, generally falling in the latter half of May and early June in western Michigan. No water temperature data was available from the USGS gauge or nearshore buoys for this reporting cycle, making it difficult to pinpoint exactly where fish are in the spawn progression. Seasonal timing alone suggests fish are either actively on beds or just completing the spawn. The absence of specific on-the-water reports from Michigan sources this week means this analysis leans on typical seasonal patterns rather than confirmed current-year intelligence — verify local conditions before heading out, and check state regulations regarding harvest timing during the spawn period.