Michigan Fly Fishing Hatch Chart
Interactive fly fishing hatch chart for Michigan. See which mayflies, caddisflies, stoneflies, and midges are hatching each month and get fly pattern recommendations. Based on 10 years of scientific observation data (2015–2024).
Using the Michigan hatch chart
This statewide chart compares when aquatic insect observations have been recorded in Michigan. Select a month to compare the share of annual mayfly, caddisfly, stonefly, and midge observations, then review fly patterns commonly used to imitate those insect groups.
Our Michigan hatch chart is built from 10 years of scientific observation data (2015–2024), covering the major aquatic insect orders: Ephemeroptera (mayflies), Trichoptera (caddisflies), Plecoptera (stoneflies), and Diptera (midges). Use it to plan your fishing trips around the most productive emergence windows of the season. Actual timing varies with elevation, latitude, water temperature, and seasonal weather, so confirm current activity with local reports and on-water observation.
Michigan river guides
- Au Sable River — The Au Sable is one of Michigan's best-known trout rivers, with cold spring-fed water, forested banks, and a long tradition of dry-fly and streamer fishing.
- Manistee River — The Manistee River runs through some of northern Michigan's most productive trout country. Its broad gauge network is useful for checking how flows change from Grayling through the lower river.
- Muskegon River — The Muskegon is a large, accessible Michigan river with trout water in its upper reaches and major seasonal steelhead and salmon opportunities farther downstream.
- Pere Marquette River — The Pere Marquette is a free-flowing western Michigan river valued for coldwater trout habitat and dependable seasonal steelhead and salmon runs.