Fishing Conditions: FAIR

Report Rating: FAIR
Crowd Rating: Crowded
Crowded

Fly Fishing Report Date:

Wednesday, Apr 24, 2019

Weather & Water Conditions

Weather Water
Temp: 52-55 Temp: 36-39
Sky: Overcast Flow: 415
Wind: None Clarity: Stained
Precip: None Runoff: No 

Colorado Stream Update: Clarity remains tough

Current Conditions at San Juan:

The story of the San Juan as of late is the continuing release of water from the side spillway instead of the main release. This has water clarity less than two feet and making fishing, well different. The Juan is still producing fish but subsurface mainly. Larger, attractor patterns like leeches and eggs have been finding strikes. Depth is crucial when nymphing the Juan.

The tail waters are fishing well with midge and micro mayfly patterns. Float fishing trips have been doing well. Guides have been reporting good insect hatches.  The fishing is fair.  Overcast skies and 52-55 degree weather. The water temperature was between 36-39 degrees and Stained.

Angling University: Up your game.
The Flyfisher Guide Service
The Colorado Trout Fisher Guide Service
Colorado Fly Fishing Trips with
Colorado Trout Fisher
Denver and Boulder Fly Fishing Guides
Colorado Trout Fisher logo

BOOK A TRIP

Trip Includes:
  • Flies and fishing tackle
  • Rods/reels
  • Waders
  • Lunch
  • Transportation
$225 for 1 or 2 people
$295 for 3 people
Angling University: Anyone can learn to fish.
The Flyfisher Guide Service: Get out and fish.

Likely Catch

Species: Rainbow
Weight: 2 lbs 0 oz
Length: 17 inches
Girth: 9 inches
Rainbow Trout Female Rainbow Trout Female
Rainbow Trout Male Rainbow Trout Male

Current Insect Hatches at San Juan

Insect Type: Midge

Insect: Black Midge

Color: Black

Size: 22

Time: PM

Black Midge Larva Illustration
Black Midge Emerger Illustration
Black Midge Adult Illustration

Recommended Flies for San Juan

Fly: Wd 40
Color: Green
Size: 20
Time: All Day
Wd 40 Wd 40
Fly: Disco Midge
Color: Red
Size: 22
Time: All Day
Disco Midge Disco Midge
Fly: Bunney Leech
Color: Brown
Size: 16
Time: All Day
Bunney Leech Bunney Leech

Colorado Hatch Conditions for Late May

Caddisflies
Insects: Little Sister Sedge
Color: Green to Greenish Brown
Dates: May 15 – Aug 30
Emergence: Afternoon & Evening
Size: 14-16
Spinner Fall: NA
Little Sister Sedge Larva illustration
Little Sister Sedge Emerger illustration
Little Sister Sedge Adult illustration
Illustrations © The Flyfisher Group 
Insects: Little Tan Short Horn Sedge
Color: Dark Brown to Yellow
Dates: Mar 1 – Aug 30
Emergence: Sporadic
Size: 14-16
Spinner Fall: NA
Little Tan Short Horn Sedge Larva illustration
Little Tan Short Horn Sedge Emerger illustration
Little Tan Short Horn Sedge Adult illustration
Illustrations © The Flyfisher Group 
Insects: Spotted Sedge
Color: Brownish Yellow
Dates: May 15 – Sep 30
Emergence: Sporadic
Size: 10-12
Spinner Fall: NA
Spotted Sedge Larva illustration
Spotted Sedge Emerger illustration
Spotted Sedge Adult illustration
Illustrations © The Flyfisher Group 

Mayflies
Insects: Blue Winged Olive
Color: Light Olive Brown to Brown Olive
Dates: Mar 1 – Nov 15
Emergence: Clouds & warmest part of day
Size: 16-18
Spinner Fall: Evening
Blue Winged Olive Nymph illustration
Blue Winged Olive Emerger illustration
Blue Winged Olive Adult illustration
Illustrations © The Flyfisher Group 
Insects: Western Black Quill
Color: Purplish Black to Grayish Brown
Dates: Apr 1 – Jun 30
Emergence: Mid Morning
Size: 14-12
Spinner Fall: Evening
Western Black Quill Nymph illustration
Western Black Quill Emerger illustration
Western Black Quill Adult illustration
Illustrations © The Flyfisher Group 

Midges
Insects: Black Midge
Color: Blackish to Black
Dates: Apr 1 – Nov 15
Emergence: All Day
Size: 18-20
Spinner Fall: 2-3 Hours
Black Midge Larva illustration
Black Midge Emerger illustration
Black Midge Adult illustration
Illustrations © The Flyfisher Group 
Insects: Chocolate Brown Midge
Color: Brown to Chocolate
Dates: Feb 15 – Dec 15
Emergence: All Day
Size: 20-22
Spinner Fall: 2-3 Hours
Chocolate Brown Midge Larva illustration
Chocolate Brown Midge Emerger illustration
Chocolate Brown Midge Adult illustration
Illustrations © The Flyfisher Group 
Insects: Micro Black Midge
Color: Blackish to Black
Dates: Mar 1 – Nov 15
Emergence: Morning
Size: 22-26
Spinner Fall: 2-3 Hours
Micro Black Midge Larva illustration
Micro Black Midge Emerger illustration
Micro Black Midge Adult illustration
Illustrations © The Flyfisher Group 
Insects: Snow Midge
Color: Gray to Charcoal
Dates: Jan 1 – Dec 31
Emergence: Warmest part of day
Size: 24-28
Spinner Fall: 2-3 Hours
Snow Midge Larva illustration
Snow Midge Emerger illustration
Snow Midge Adult illustration
Illustrations © The Flyfisher Group 

Stoneflies
Insects: Salmon Fly
Color: Black to Reddish Brown
Dates: May 15 – Jul 15
Emergence: 50-60° Water Late Morning on
Size: 4-8
Spinner Fall: NA
Salmon Fly Nymph illustration
Salmon Fly Adult illustration
Illustrations © The Flyfisher Group 
Insects: Small Western
Color: Brownish
Dates: May 15 – Jul 15
Emergence: 46-56° Water Temps
Size: 14-18
Spinner Fall: NA
Small Western Nymph illustration
Small Western Adult illustration
Illustrations © The Flyfisher Group 
Insects: Winter Black
Color: Black Brown to Reddish Olive, Mottled Brown
Dates: Apr 1 – Aug 15
Emergence: Cold Mountain Streams and Small Ponds
Size: 18-22
Spinner Fall: NA
Winter Black Nymph illustration
Winter Black Adult illustration
Illustrations © The Flyfisher Group 

Terrestrials
Insects: Beetle
Color: Brownish to Black
Dates: May 1 – Nov 30
Emergence: All Day
Size: 10-18
Spinner Fall: NA
Beetle illustration
Illustrations © The Flyfisher Group 
Insects: Black Ant
Color: Black
Dates: May 1 – Nov 15
Emergence: All Day
Size: 20-24
Spinner Fall: NA
Black Ant illustration
Illustrations © The Flyfisher Group 
Insects: Grasshopper
Color: Green to Brownish Tan
Dates: May 15 – Nov 15
Emergence: All Day
Size: 2-14
Spinner Fall: NA
Grasshopper illustration
Grasshopper illustration
Illustrations © The Flyfisher Group 
Insects: Red Ant
Color: Red to Orangish
Dates: May 1 – Oct 15
Emergence: All Day
Size: 18-22
Spinner Fall: NA
Red Ant illustration
Illustrations © The Flyfisher Group 


Current Conditions

Rain
Currently: Light Rain
Temperature:  42 F
Temp Max:  46 F
Temp Min:  38 F
Humidity: 75%
Wind: 16 NE mph
Pressure: 1004
Rain Tuesday 9:00PM — 35 ℉
Expect light rain with temperatures ranging between 35 and 44 ℉.
Wind: 33 WSW mph; Humidity: 68%;  Rain: 2.25 for next 3 hours.
Rain Wednesday 6:00AM — 40 ℉
Expect light rain with temperatures ranging between 40 and 42 ℉.
Wind: 29 SW mph; Humidity: 72%;  Rain: 1.374 for next 3 hours.
Rain Wednesday 9:00AM — 45 ℉
Expect light rain with temperatures ranging between 45 and 45 ℉.
Wind: 33 SW mph; Humidity: 60%;  Rain: 0.375 for next 3 hours.
Rain Wednesday 12:00PM — 49 ℉
Expect light rain with temperatures ranging between 49 and 49 ℉.
Wind: 26 SSW mph; Humidity: 48%;  Rain: 0.563 for next 3 hours.
Rain Wednesday 3:00PM — 55 ℉
Expect light rain with temperatures ranging between 55 and 55 ℉.
Wind: 37 SSW mph; Humidity: 39%;  Rain: 0.25 for next 3 hours.
Clouds Wednesday 6:00PM — 56 ℉
Expect overcast clouds with temperatures ranging between 56 and 56 ℉.
Wind: 26 SSW mph; Humidity: 35%; 
Rain Wednesday 9:00PM — 50 ℉
Expect light rain with temperatures ranging between 50 and 50 ℉.
Wind: 30 ENE mph; Humidity: 57%;  Rain: 0.312 for next 3 hours.
Clouds Thursday 6:00AM — 43 ℉
Expect scattered clouds with temperatures ranging between 43 and 43 ℉.
Wind: 27 E mph; Humidity: 63%; 
Clear Thursday 9:00AM — 54 ℉
Expect clear sky with temperatures ranging between 54 and 54 ℉.
Wind: 55 S mph; Humidity: 41%; 
Rain Thursday 12:00PM — 51 ℉
Expect light rain with temperatures ranging between 51 and 51 ℉.
Wind: 51 SSW mph; Humidity: 43%;  Rain: 0.312 for next 3 hours.
Rain Thursday 3:00PM — 56 ℉
Expect light rain with temperatures ranging between 56 and 56 ℉.
Wind: 54 SW mph; Humidity: 27%;  Rain: 0.125 for next 3 hours.
Clouds Thursday 6:00PM — 55 ℉
Expect broken clouds with temperatures ranging between 55 and 55 ℉.
Wind: 45 WSW mph; Humidity: 29%; 
Clouds Thursday 9:00PM — 48 ℉
Expect broken clouds with temperatures ranging between 48 and 48 ℉.
Wind: 18 WNW mph; Humidity: 47%; 
Clear Friday 6:00AM — 38 ℉
Expect clear sky with temperatures ranging between 38 and 38 ℉.
Wind: 16 NNE mph; Humidity: 62%;