Lake Michigan Salmon Season Builds on Back-to-Back Record Years

What's biting

What's next

With no current buoy readings on hand, the near-term outlook draws on seasonal patterns for southern Lake Michigan in late June. Surface temperatures in this part of the lake typically climb into the upper 60s to low 70s°F by this point in the season, pressing Chinook and coho salmon down to the thermocline. That thermal break generally establishes between 50 and 100 feet of depth, depending on recent wind events and weather. Trolling presentations run at or just above the thermocline — downrigger spoons, stickbaits, or dodger-fly combos — are the standard approach once the thermocline locks in. Early morning hours before the sun climbs tend to produce the most active topside salmon action.

If warm, stable conditions hold into the weekend, expect surface temps to continue trending upward nearshore, which can push salmon deeper and concentrate them tightly around the thermal break. When northwest winds kick up — a common pattern behind late-June frontal systems — they can drive upwelling along the Chicago shoreline, temporarily drawing colder water to the surface and sometimes producing brief, shallower windows of salmon action off piers and breakwalls. Watching wind direction alongside wave-height data from the IL/IN Sea Grant buoy network is the best way to anticipate those upwelling windows.

On the population front, two-year-old coho from the 2024 stocking class — part of the record-setting year documented by the WI DNR Lake Michigan Fishing Report — should be reaching catchable adult size this summer. Chinook from the same alewife-supported cohort are entering the 3-to-5-year age range when they tend to run heaviest and become the primary offshore target.

For pier and shore anglers, smallmouth bass are in full post-spawn summer mode and actively feeding on crayfish and gobies along Chicago's rocky breakwalls, jetties, and harbor pilings. Dawn and dusk windows are consistently the most productive for bass. Yellow perch can be found near harbor mouths and rocky structure, though late June is typically a slower nearshore period as fish push into deeper, cooler water until fall. The Illinois-Indiana Sea Grant nearshore buoy network for southern Lake Michigan is worth bookmarking for wave height and temperature updates — conditions can shift quickly on the southern end and a favorable weather window can open or close within hours.

Context

For Lake Michigan at the Chicago latitude, late June marks the full transition into summer offshore mode. Historically, the Chinook and coho salmon fishery out of area launch points runs from June through early August, tracking the thermocline and baitfish schools into deeper mid-lake structure. This is also the period when offshore trollers dial in their downrigger depths after the more variable spring transition.

The 2024 season set a meaningful benchmark. The WI DNR Lake Michigan Fishing Report recorded over 210,000 coho harvested lake-wide — a record — and more than 160,000 Chinook, the highest Chinook total since 2012. Both milestones were directly tied to improved alewife year classes in recent years, which increased stocked fish survival through their critical first winters. The alewife cycle is the engine behind Lake Michigan's stocked salmon program: strong forage cohorts mean better juvenile survival, better body condition at maturity, and a more consistent late-summer bite for anglers on both the Illinois and Wisconsin shores.

Whether 2025 and 2026 stocking classes are tracking at similar survival rates is not confirmed in available sources for this report. What the historical arc does suggest is that the lake entered this season with an above-average salmon population baseline coming off those two strong years, a meaningful tailwind for Chicago-area charter and private-boat anglers heading into summer.

No specific prior-year reports from this exact week in June appeared in the available source feeds, so a precise early-late-on-schedule comparison for 2026 is not possible from the data at hand. The IL/IN Sea Grant notes that its three nearshore Lake Michigan buoys have become a widely used resource for the southern-lake angling and boating community — a sign of how closely anglers here track lake conditions to time their outings.