New Hampshire Hatch Chart
Which insects hatch on New Hampshire rivers each month, when they peak, and the flies to match.
- 12Hatches
- 2Hatching in November
- 5Watersheds
Hatching in November
-
Blue-Winged OliveMayfly
Sparkle Dun #18–22
-
Autumn CaddisCaddis
October Caddis #14
New Hampshire hatch calendar
Every hatch on the 5 watershed hatch charts of New Hampshire's rivers, month by month.
| Hatch | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Flies | Water temp |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Little Black Stonefly Stonefly Capnia sp. | In season | Peak | In season | Elk Hair Caddis #18 | 38–50°F | |||||||||
| Blue-Winged Olive Mayfly Baetis tricaudatus | In season | Peak | Peak | In season | Sparkle Dun #18–22 | 44–58°F | ||||||||
| Quill Gordon Mayfly Epeorus pleuralis | In season | Peak | Quill Gordon #12–14 | 48–56°F | ||||||||||
| Grannom Caddis Caddis Brachycentrus numerosus | In season | Peak | Elk Hair Caddis #14–16 | 48–58°F | ||||||||||
| Hendrickson Mayfly Ephemerella subvaria | Peak | In season | Comparadun #12–14 | 48–58°F | ||||||||||
| March Brown Mayfly Stenonema vicarium | In season | Peak | In season | March Brown #10–12 | 52–62°F | |||||||||
| Green Drake Mayfly Ephemera guttulata | Peak | Peak | Green Drake Wulff #8–10 | 55–65°F | ||||||||||
| Light Cahill Mayfly Stenacron interpunctatum | In season | Peak | In season | Light Cahill #14 | 58–70°F | |||||||||
| Sulphur Mayfly Ephemerella dorothea | In season | Peak | In season | Parachute Sulphur #16–18 | 55–68°F | |||||||||
| Trico Mayfly Tricorythodes sp. | In season | Peak | In season | Trico Spinner #22–26 | 60–72°F | |||||||||
| Isonychia Mayfly Isonychia bicolor | In season | Peak | In season | Slate Drake #10–12 | 58–68°F | |||||||||
| Autumn Caddis Caddis Neophylax sp. | In season | Peak | In season | October Caddis #14 | 48–58°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 New Hampshire
New Hampshire hatch FAQ
What are the main hatches in New Hampshire?
Little Black Stonefly, Blue-Winged Olive, Quill Gordon, Grannom Caddis, and Hendrickson are on the most watershed hatch charts across New Hampshire's rivers.
When is the best hatch fishing in New Hampshire?
May, when 6 of the 12 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 5 watersheds New Hampshire'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.
