Utah ·
Weber River Fly Fishing Report - September 20, 2026
WEBER RIVER
ReportSEP 20 — 27, 2026
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Flow
88CFS
WEBER RIVER NEAR OAKLEY, UT
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Water Temp
—
Updated 2026-09-20
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Weather
39–71°F
Mostly Clear
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Clarity
Clear
Check post-storm
Flow has ticked up to 87.6 CFS (gauge height 5.44 ft near Oakley) from last week's lows, but the water remains gin-clear, keeping fish tight to undercut banks, deeper structure, and shaded edges. Expect a bluebird day with a high of 67°F and light winds — ideal conditions for precise presentations.
What's Working — Hot Flies
Juju Baetis Tungsten #22
22
Tungsten Rainbow Warrior - Extra Heavy #14
14
Tungsten Rainbow Warrior - Pearl #22
22
Parachute - Blue Wing Olive #22
22
Tungsten Split Case Nymph - PMD #20
20
Tailwater Sowbug - Rainbow #10
10
Bionic Hopper - Tan #12
12
Bionic Ant 2.0 - Black #16
16
Corn-fed Caddis (CDC) Tan #20
20
Egan's Frenchie #12
12
Black Zebra Midge(TBH) #20
20
Egan's Silver Bullet - Baetis #14
14
Hatch Chart
| Insect | Size | Activity | Prime Time |
|---|---|---|---|
| Midge | 20-24 | Heavy | 9 AM - 12 PM |
| Blue-Winged Olive (Baetis) | 20-22 | Moderate | 11 AM - 2 PM |
| PMD (Pale Morning Dun) | 18-20 | Light | 10 AM - 1 PM |
| Caddis | 16-18 | Moderate | 5 PM - 7 PM |
| Terrestrial (Grasshopper/Ant) | 12-16 | Moderate | 1 PM - 5 PM |
Best Time Window
- 7 AM - 10 AM: Pre-sun nymphing with midges and baetis patterns in deeper runs and undercut banks before fish become wary in clear water.
- 1 PM - 5 PM: Terrestrial prime time — walk grassy banks and pound hoppers and ant patterns tight to the edges in the warmest part of the day.
- 5 PM - 7 PM: Evening caddis and dry fly window — fish CDC caddis and BWO parachutes in tailouts and slower flats as light drops and surface activity picks up.
Guide's Tip
From the benchWith flows at 87.6 CFS and water running clear, fish are spooky — stay low, approach from downstream, and keep your leader long (12–14 ft) with 5X or 6X tippet. Focus your morning nymphing on the deeper seams and undercut banks using a tight-line or Euro setup to maintain direct contact and detect subtle takes. As afternoon heats up toward 67°F, walk the grassy banks and slap a hopper or ant pattern within 6 inches of the bank — September terrestrial action on the Weber can be explosive. Transition to a dry fly or CDC caddis in the evening as light fades and fish move into the tailouts.
Main Species
Brown Trout
Rainbow Trout
Bonneville Cutthroat Trout
