Coho run winding down, Chinook staging as May deepens on Indiana's lakeshore

What's Biting

What's Next

Over the next two to three days, mid-May conditions on Lake Michigan's Indiana shoreline typically bring the clearest separation between the spring coho run — largely concluded by early May in most years — and the leading edge of Chinook activity. Without current buoy readings available this cycle, anglers should check the IL/IN Sea Grant nearshore buoy network before heading out to confirm actual surface temperatures and wave heights before making the call to launch.

**Targeting early Chinook:** As surface temperatures push toward the low-to-mid 50s °F, look for Chinook to hold along thermal break lines where warmer surface water meets the cooler column below. Trolling spoons and body baits at variable depths — typically 15 to 35 feet down on planer boards — can locate scattered early-season fish before the main summer push materializes in earnest. The banner alewife-backed salmon classes documented by the WI DNR Lake Michigan Fishing Report for 2024 represent a meaningful vote of confidence in the lake's forage base; Indiana anglers tap that same southern basin alewife population.

**Perch and bass windows:** Yellow perch action at pier heads and in 15–25 feet of nearshore water should remain consistent through the week as light penetration improves in a typically clear post-turnover water column. Small jigs tipped with wax worms or emerald shiners are standard pier-head producers during this seasonal window. Smallmouth bass are entering their pre-spawn staging phase — focus on hard-bottom transition zones, gravel flats, and rocky shoreline structure in 4–12 feet. This is often one of the better smallmouth windows of the year along the Indiana shoreline, as fish stack on structure ahead of the spawn and feed aggressively.

**Weekend timing:** The Last Quarter moon this weekend reduces nighttime light competition, which historically favors low-light bite windows — first light and the hour before dark — for both salmon and perch. Wind and wave height remain the dominant variable for open-lake safety; monitor the IL/IN Sea Grant buoy feeds or National Weather Service marine zone forecasts before departing any Indiana port.

Context

Mid-May on Lake Michigan's Indiana shoreline sits squarely in the spring-to-summer salmon transition under typical conditions. Coho runs peak in late April and taper through the first half of May, while Chinook activity begins building toward its summer apex. Steelhead, which pushed through port river mouths from late winter through April, are largely completing their spawning runs and filtering back out to the open lake by this point in the season.

The most substantive benchmark available this cycle comes from the WI DNR Lake Michigan Fishing Report, which recorded a landmark 2024 season: more than 210,000 coho lake-wide — a new all-time record — and over 160,000 Chinook, the strongest Chinook class since 2012. The WI DNR attributed both figures to exceptional alewife survival over recent years, which directly improved post-stocking salmon survival rates. Because the Indiana shoreline draws from the same southern Lake Michigan alewife population, these lake-wide signals carry real relevance locally: the forage base is solid, and salmon-stocking returns have been running above the long-term average heading into this season.

There is no Indiana-specific comparative data in the current feeds to measure whether this May is tracking early, late, or on-schedule temperature-wise. The absence of buoy readings for this report limits any precise calibration. Historically, southern Lake Michigan surface temps in the second week of May reach the low-to-mid 50s °F — a range that correlates with reliable nearshore perch activity and the opening of productive Chinook trolling windows. If this spring has run warmer than average, a pattern seen across several recent Great Lakes seasons, expect the Chinook transition to arrive slightly ahead of its historical midpoint, with fish staging in open water at depth rather than concentrated in the near-surface layer.