Ohio Hatch Chart
Which insects hatch on Ohio rivers each month, when they peak, and the flies to match.
- 21Hatches
- 3Hatching in November
- 4Watersheds
Hatching in November
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Blue-Winged OliveMayfly
CDC Emerger #18–22, Parachute Adams #18–22
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Autumn SedgeCaddis
October Caddis #14
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Fall BWOOther
Sparkle Dun #18–20
Ohio hatch calendar
Every hatch on the 4 watershed hatch charts of Ohio's rivers, month by month.
| Hatch | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Flies | Water temp |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Winter Midge Midge Chironomidae | Peak | Peak | In season | In season | Zebra Midge #20–26 | 34–50°F | ||||||||
| Little Black Caddis Caddis Chimarra sp. | In season | Peak | In season | Soft Hackle #18 | 46–56°F | |||||||||
| Blue-Winged Olive Mayfly Baetis tricaudatus | In season | In season | Peak | Peak | In season | In season | CDC Emerger #18–22, Parachute Adams #18–22 | 44–58°F | ||||||
| Early Black Stonefly Stonefly Allocapnia sp. | Peak | In season | Black Elk Hair #16–18 | 36–50°F | ||||||||||
| Quill Gordon Mayfly Epeorus pleuralis | Peak | In season | Quill Gordon #12–14 | 48–56°F | ||||||||||
| American March Brown Other Maccaffertium vicarium | Peak | In season | March Brown #10–12 | 52–62°F | ||||||||||
| Hendrickson Mayfly Ephemerella subvaria | In season | Peak | Comparadun #12–14 | 48–58°F | ||||||||||
| Yellow Sally Stonefly Isoperla sp. | In season | Peak | In season | Yellow Sally #14–16 | 52–64°F | |||||||||
| Brown Drake Mayfly Ephemera simulans | In season | Peak | Brown Drake #10–12 | 55–65°F | ||||||||||
| Grannom Caddis Brachycentrus numerosus | Peak | In season | Elk Hair Caddis #14–16 | 48–58°F | ||||||||||
| Green Sedge Caddis Rhyacophila sp. | In season | Peak | In season | Green Caddis #12–14 | 55–66°F | |||||||||
| Light Cahill Mayfly Stenacron interpunctatum | Peak | In season | Light Cahill #14 | 58–70°F | ||||||||||
| Hex / Giant Mayfly Mayfly Hexagenia limbata | Peak | In season | Hex Paradrake #4–6 | 62–72°F | ||||||||||
| Michigan Caddis Caddis Hydropsyche sp. | In season | Peak | In season | Sparkle Pupa #14 | 58–70°F | |||||||||
| Sulphur Mayfly Ephemerella dorothea | Peak | In season | Parachute Sulphur #16–18 | 55–68°F | ||||||||||
| Terrestrials Other Ants · Beetles | In season | Peak | In season | Fur Ant #14–18 | 62–78°F | |||||||||
| Trico Mayfly Tricorythodes sp. | In season | Peak | In season | Trico Poly Wing #22–26, Trico Spinner #22–26 | 60–72°F | |||||||||
| Flying Ant Terrestrial Camponotus sp. | Peak | In season | Fur Ant #16–18 | 64–76°F | ||||||||||
| Isonychia Mayfly Isonychia bicolor | In season | Peak | In season | Slate Drake #10–12 | 58–68°F | |||||||||
| Autumn Sedge Caddis Neophylax sp. | In season | Peak | In season | October Caddis #14 | 48–58°F | |||||||||
| Fall BWO Other Baetis sp. | In season | Peak | In season | Sparkle Dun #18–20 | 44–56°F |
- In season
- Peak
- This month
A month is marked when any of the watershed charts lists the hatch, and as a peak when most of them peak then. Smaller streams often see lighter or later hatches.
River hatch charts in Ohio
Ohio hatch FAQ
What are the main hatches in Ohio?
Blue-Winged Olive, Trico, Winter Midge, Little Black Caddis, and Early Black Stonefly are on the most watershed hatch charts across Ohio's rivers.
When is the best hatch fishing in Ohio?
May–Jun, when 8 of the 21 hatches on the chart are on the water. Check local reports: weather moves every hatch.
Where does this hatch chart come from?
From the hatch charts of the 4 watersheds Ohio's rivers run through. A month is marked when any of them lists the hatch, and as a peak when most of them peak then.
