Henry's Lake
HENRY'S LAKE
ReportSEP 9 — 16, 2026
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Flow
—CFS
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Water Temp
—
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Weather
41–71°F
Sunny
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Reported By
Bruce Staples
On the water
Cooling nights are pushing fish into the shallows to forage around submerged weed beds. Sunny skies and afternoon wind gusts up to 21 mph make early-morning boat sessions the priority.
From the ShopBruce Staples · September 9, 2026
The lake is cooling off thanks to fewer daylight hours and colder nights. That means fish are beginning to move into shallow water to forage on life forms around submerged weed beds.
Early in the day to mid-morning still offers the best fishing times before bright mid-day sunlight reduces overhead cover and warms water closest to the surface. Fish streamer and leech patterns with slow retrieves or under an indicator, as well as nymph patterns underneath an indicator near submerged weed beds.
Boat fishing remains dangerous when winds pick up.
What's Working — Hot Flies
Hatch Chart
| Insect | Size | Activity | Prime Time |
|---|---|---|---|
| Leeches | #10–14 | High — primary forage near weed beds | Early morning to mid-morning |
| Chironomids (Midges) | #10–14 | Moderate — consistent stillwater staple | Early morning |
| Damselfly Nymphs | #12 | Moderate — weed bed edges | Morning |
| General Nymphs / Scuds | #12–14 | Moderate — subsurface near vegetation | Morning to mid-morning |
Best Time Window
- FIRST LIGHT TO MID-MORNING: Prime window — fish are active in the shallows near weed beds; work leech and streamer patterns with a slow retrieve or under an indicator
- MID-MORNING (WINDING DOWN): Bright sunlight reduces overhead cover and warms the surface; transition to nymph patterns under an indicator and prepare to wrap up
- AVOID MIDDAY AND WINDY AFTERNOONS: Reduced fish activity and dangerous boat conditions; today's forecast shows gusts up to 21 mph
Guide's Tip
From the benchGet on the water at first light and plan to be off or repositioned to sheltered water by late morning — both for the best fishing and for safety as afternoon winds build. Keep retrieves painfully slow; the fish are foraging, not chasing. Watch your wind forecast closely before launching, as conditions can deteriorate quickly on the lake.
Main Species
Yellowstone Cutthroat Trout
Brook Trout
Rainbow Trout
