Coho Stage Near Chicago Harbors as Early May Full Moon Peaks

What's Biting

What's Next

The full moon peaking on May 3 sets up favorable low-light feeding windows over the coming days. For coho salmon — the primary spring draw along the Chicago lakefront — dawn and dusk sessions near harbor mouths and pier heads historically produce the strongest action during this lunar window. As the moon wanes into next week, broader daytime bite windows typically open up. Plan early-morning launches this weekend if weather cooperates.

Water temperatures on southern Lake Michigan typically sit in the upper 40s to low 50s°F by early May. If a sustained warm front has been pushing surface temps toward 52–55°F, expect coho to stage tighter to shore and near-surface presentations to become more effective. Wind events can drive significant surface-temperature swings on the open lake — check local buoy data before launching.

Yellow perch remain a reliable mid-May target. Breakwall structure, rocky flats, and concrete pilings at Chicago's harbor entries concentrate fish. Light jigging with small minnows or tube jigs tipped with wax worms is the classic approach; perch typically school in 10–20 feet of water through late spring and are accessible from both boat and pier.

Steelhead, which drove much of the early-spring pier action in March and April, are largely tapering off by early May. Stragglers still turn up near harbor mouths, but the bulk of the run is behind us — any steelhead encounter at this point is a bonus, not the plan.

Smallmouth bass are the emerging story for the weeks ahead. On The Water recently featured Captain Joe Fonzi breaking down Lake Erie's trophy smallmouth fishery and specifically the outsized role gobies now play in driving Great Lakes smallmouth growth rates. Chicago-area fish are similarly goby-focused; a 4-inch tube jig or soft-plastic goby imitation worked slowly along rocky bottom structure is a productive approach as pre-spawn staging ramps up through mid-May.

For this weekend, the full moon's trailing feeding edge is your primary timing asset — push for first-light launches and plan to be on the water before sunrise.

Context

Early May sits at the hinge point of Lake Michigan's spring season for Chicago-area anglers. Historically, the coho salmon fishery along the Chicago shoreline peaks during the two-week window spanning late April through mid-May, driven by rising water temperatures and bait movements that pull fish inshore from deeper water. A full moon coinciding with this traditional run window — as it does this year on May 3 — has in past seasons produced some of the better pier and harbor-mouth bite of the spring, with fish feeding aggressively during low-light edges.

By the same calendar in prior years, steelhead runs are well past their March peak and winding down, yellow perch are reliably active on breakwall structure, and early smallmouth are beginning to show on rocky nearshore habitat as bottom temps tick upward. Those seasonal benchmarks appear to be tracking to type this year, though no direct charter, shop, or agency reports for the Chicago section of Lake Michigan arrived in this cycle to confirm or contradict that baseline.

Great Lakes Now has been tracking broader basin fisheries investment, including the recently completed spawning reef in Saginaw Bay, Lake Huron — a habitat restoration project intended to boost native fish numbers across the system. While specific to Lake Huron, it reflects the same management framework that governs Lake Michigan's salmon and trout stocking programs and underscores that the ecological infrastructure supporting Chicago-area fishing is actively maintained.

In the absence of direct local intel this cycle, the seasonal patterns described here reflect the typical early-May baseline for the Illinois shoreline. Conditions can vary meaningfully from year to year; consult IDNR angler reports for real-time updates before any launch.