Fishing Intelligence September

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

Water Temp
53.4 °F
Flow
2,370 CFS
Flow Trend
Rising
Air Temp
71.2 °F
Wind
6.3 mph N
Sky
Partly cloudy (69%)
Conditions
Partly cloudy
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)
Pupae
Prolific evening caddis hatches on the Green River April through September
Mahogany Dun
Emergers & Adults
Excellent fall Mahogany Dun hatches on the Green. Size 14-16, best on cool overcast afternoons
Recommended Flies
Dry Flies
  • Parachute BWO #18-22
  • BWO Sparkle Dun #18-22
  • Vis-A-Dun #18-20
  • CDC BWO #18-20
  • 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 #4-6
  • Meat Whistle #4-6
  • Conehead Muddler #4-6
  • Butt Monkey #2-4 (brown spawning)
Techniques & Conditions Notes
Flow is elevated on the Green River. Target inside bends and eddies behind boulders. Use heavier split shot to get flies down. Streamer fishing along cut banks can be excellent in higher flows.
Flow has been rising over the last 6 hours — Flaming Gorge Dam releases are increasing. Fish now before clarity decreases. Streamers and large nymphs will outperform dries in rising water.
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.