Fishing Intelligence September

Green River — Auto-updated from USGS, Open-Meteo & NWS

Water Temp
58.3 °F
Flow
1,880 CFS
Flow Trend
Stable
Air Temp
74.7 °F
Wind
7.5 mph E
Sky
Overcast (99%)
Conditions
Overcast
Rain Next 48hrs
None expected
Current Hatches
Midges (Chironomidae)
Pupae & Adults
Year round staple on the Green River tailwater below Flaming Gorge Dam
Blue Winged Olive (BWO)
Emergers & Adults
Overcast today — excellent BWO hatch conditions on the Green
Caddis (Hydropsychidae)
Adults & Egg Layers
Prolific evening caddis hatches on the Green River April through September
Trico
Spinners
Early morning Trico spinner falls on the Green July through September. Size 20-24. Can be spectacular
Mahogany Dun
Emergers & Adults
Excellent fall Mahogany Dun hatches on the Green. Size 14-16, best on cool overcast afternoons
Terrestrials (Hoppers/Ants/Beetles)
Adults
Summer terrestrial fishing on the Green can be outstanding. Fish large foam hoppers and ant patterns along grassy banks
Recommended Flies
Dry Flies
  • Parachute BWO #18-22
  • BWO Sparkle Dun #18-22
  • Vis-A-Dun #18-20
  • CDC BWO #18-20
  • Dave's Hopper #8-12
  • Chernobyl Ant #10-14
  • Fat Albert #8-10
  • Yellow Sally #14-16
  • Trico Spinner #20-24
  • Mahogany Dun #14-16
  • CDC BWO #18-20
Nymphs
  • Pheasant Tail Nymph #16-20
  • Hare's Ear Nymph #14-18
  • Zebra Midge #18-22
  • Copper John #14-18
  • Rainbow Warrior #16-20
  • RS2 #18-22
  • PMD Nymph #16-18
  • Caddis Pupa #14-16
  • Hopper Dropper Rig #8-16
Streamers
  • Woolly Bugger (olive/black) #6-10
  • Slumpbuster #6-8
  • Sparkle Minnow #6-8
  • Conehead Muddler #6-8
  • Butt Monkey #2-4 (brown spawning)
Techniques & Conditions Notes
Flow is in a great fishable range on the Green River tailwater. This is one of the premier trout fisheries in the American West. All three sections are fishable — Section A offers the most technical fishing, Section B and C offer more space and bigger fish.
Ideal water temp for Green River rainbow and brown trout. This is prime time on one of the best tailwaters in the west. Expect excellent dry fly opportunities during hatch windows. The fish can be very selective so match the hatch carefully.
Overcast skies are perfect for BWO hatches on the Green tailwater. This river is world famous for its BWO hatches — watch for rising fish throughout all sections especially in the slower flat water.
Fall on the Green River is bucket list fishing. BWO and Mahogany Dun hatches on overcast afternoons bring massive fish to the surface. Big browns become aggressive before spawn. This is arguably the best time of year on the Green.