Post-spawn bass and coho active at the Grand River mouth

What's Biting

What's Next

The 3,760 cfs reading on the Grand River (USGS gauge 04119000) is a moderate late-spring flow — enough volume to push a plume well into Lake Michigan at Grand Haven, but not a sediment-heavy flood pulse. As river levels ease naturally over the coming days, clarity at the mouth should improve, and the edge of that freshwater plume is where coho, brown trout, and smallmouth bass tend to stage.

**Coho near-shore window:** Late May through mid-June is the textbook coho corridor along southern Lake Michigan's nearshore. Last season's record harvest, documented by the WI DNR Lake Michigan Fishing Report, reflects a well-supported stocked population now maturing toward prime size in the 10–20 foot nearshore zone. Troll silver spoons and small stickbaits during low-light windows — dawn off the Grand Haven pier heads is the historically productive approach. As the lake stratifies through late May, coho will suspend along the emerging thermocline; matching that depth with your presentation is the key adjustment to make as the season progresses.

**Smallmouth bass:** With the bluegill spawn underway in the shallows per Tactical Bassin, post-spawn smallmouth are transitioning to opportunistic feeding. Rocky points and the sandy structure adjacent to the river mouth are reliable ambush spots. In southern Lake Michigan's characteristically clear water this time of year, finesse rigs — drop-shot and Ned rig — and subtle glide baits on a slow retrieve outperform power approaches on most days. A waxing crescent moon keeps nighttime influence minimal; midday bite windows may actually outperform early morning for bass through this phase.

**Steelhead:** The spring steelhead run is in its late stages for West Michigan river systems by mid-May. Water temperatures are climbing and most fish have returned to the lake. A few stragglers may still hold near deeper sections of the Grand River mouth — check Michigan regulations for current creel rules and any seasonal closures before targeting them.

**Planning ahead:** No specific weather forecast data was available for this report — check local conditions carefully before launching. Lake Michigan's May weather can shift quickly; north and northwest winds can build seas to 3–5 feet in a few hours, making pier fishing and small-boat nearshore work genuinely hazardous. Stable southwest winds and partly cloudy skies are the conditions to wait for before committing to an offshore run.

Context

Mid-May on the Grand River mouth and southern Lake Michigan falls in the classic shoulder between the spring steelhead run and the early-summer salmon nearshore season. Most years, steelhead peak through the Grand River corridor in late March and early April, with fish largely back in the lake by the second week of May as water temperatures climb past 50°F. By mid-May the lower river transitions toward a warmwater fishery — smallmouth, carp, and channel catfish dominate the lower reach — while the lake's nearshore zone becomes the focus for salmonid anglers targeting coho and, later, Chinook.

The backdrop for 2026 is genuinely favorable. The WI DNR Lake Michigan Fishing Report attributed the 2024 record coho harvest and 12-year-high Chinook numbers directly to strong alewife year classes that improved stocked fish survival. A well-fed forage base in 2024–2025 should carry through to better-conditioned fish in the current nearshore cohort. Whether that translates into exceptional Grand Haven pier production will depend on Michigan DNR stocking quantities specific to the 2025 planting cycle, but lake-system health indicators are pointing in the right direction.

The Grand River at 3,760 cfs is consistent with the moderate-to-normal range for late May. This is not an exceptional flood year, which is good news for pier-access anglers and for water clarity near the mouth. Without a direct historical comparison dataset in this report's data payload, we can't precisely characterize this flow against the long-term mean for this date — but nothing in the available signals suggests anomalous conditions at either extreme. The season appears to be unfolding on a fairly typical schedule for this stretch of the southern lake.