Salmon and Smallmouth Converge as Mid-May Peaks on Chicago's Lakefront

What's Biting

What's Next

Over the next two to three days, the waxing crescent moon keeps overnight sky glow modest, which generally favors early-morning bite windows in the low-light conditions that coho salmon and brown trout prefer. Plan launches for first light if targeting coho — dawn trolling passes with spoons and cut plugs in the 15- to 40-foot range along the Chicago lakefront have historically been productive while fish remain in the nearshore zone.

Mid-May is the inflection point for coho on southern Lake Michigan. Fish that moved inshore during April may begin pushing toward tributary mouths or transitioning to deeper water as surface temps rise. The WI DNR Lake Michigan Fishing Report's 2024 data showed exceptional survival rates tied to strong alewife forage, suggesting this season's class of Lake Michigan coho is well-conditioned — worth targeting aggressively while the window holds.

Smallmouth bass are the more reliable focus heading into the weekend. Prespawn activity on Chicago's rocky breakwalls, harbor structure, and nearshore shoals typically peaks when water temps clear the upper 50s°F. Tactical Bassin recommends covering water efficiently during the prespawn phase — fish school together and can be located with swimbaits and glide baits before switching to finesse presentations once a school is pinned down. Rocky points and jetties from 5 to 15 feet are traditional staging grounds and worth working methodically.

No current buoy readings were available for the Chicago nearshore zone at the time of this report, which is the key variable heading into the weekend. Water temperature dictates whether the smallmouth spawn has already begun, whether coho are still accessible near the surface, or whether brown trout might be staging near tributary mouths. Before launching, check IL/IN Sea Grant's nearshore buoy network for the most current readings to calibrate depth selection and target priority. If temps are sitting in the mid-to-upper 50s, we expect this to be one of the stronger fishing windows of the early season.

Context

For Chicago-area anglers, mid-May typically falls at the heart of the seasonal transition window — between the tail of the spring salmon run and the opening of the smallmouth spawn. In most years, nearshore water temps have climbed out of the low 50s°F by now, though spring-to-spring variability can shift that timeline by two to three weeks in either direction.

The broader Lake Michigan salmon fishery enters 2026 on unusually strong footing. The WI DNR Lake Michigan Fishing Report documented record coho harvests in 2024 (over 210,000 fish) and the highest Chinook numbers since 2012 (over 160,000), attributing both to improved alewife year classes that drove higher survival among stocked Pacific salmon. Alewife dynamics tend to carry forward across multiple salmon year classes, so the 2026 season may benefit from some of that carryover abundance. No source in this week's intel pull provides current-season creel or catch data specific to the Illinois portion of the lake, so that historical baseline is the best signal available.

For smallmouth bass, mid-May is historically one of the most consistent windows on Lake Michigan's southern basin. The prespawn transition reliably draws fish onto shallow rocky structure, and unlike the post-spawn period when fish scatter and can be difficult to pattern, prespawn smallmouth are predictably aggressive and concentrated. No comparative signal is available from current sources to indicate whether this spring is running early, late, or on schedule relative to prior years. The best calibration remains local harbor reports and the IL/IN Sea Grant buoy network — if this spring has tracked warmer than average, the spawn may already be underway; if it has run cold, the most aggressive prespawn feeding window could still be ahead.