Delaware River Fly Fishing Report - September 20, 2026

Fly Fishing Report

DELAWARE RIVER

Report
SEP 20 — 27, 2026
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Flow
1480CFS
DELAWARE RIVER AT CALLICOON NY
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Water Temp
65.3°F
Updated 2026-09-20
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Weather
49–69°F
Rain Showers
💧
Clarity
Clear
Check post-storm
Flow is running at 1,480 cfs with a gauge height of 3.48 ft at Callicoon — slightly off last week's levels and in solid shape right now, but expect a significant rise through Sunday as 1–1.5 inches of rain moves in overnight; water temp is a comfortable 65.3°F, so fish are active and feeding aggressively before conditions change.
Best Time Window
  • 7 AM - 10 AM: Prime nymphing window in the main channel runs before rain intensifies — fish are active and flows are still in great shape at 1,480 cfs.
  • 10 AM - 1 PM: BWO hatch window under heavy overcast skies; watch the slow tailouts and flat water for rising fish and be ready with a #22 dry.
  • 4 PM - Dark: Pre-storm streamer and Isonychia evening — swing big patterns along the banks and deep bends as barometric pressure drops and browns go on the feed.
Guide's Tip
From the benchGet on the water first thing this morning — you have a narrow window before the rain intensifies Sunday afternoon and pushes flows up significantly. Focus your nymphing in the 3–5 foot runs along the main channel seams, keeping your indicator set at 1.5x the depth and mending aggressively to maintain a dead-drift. As the sky darkens and barometric pressure drops through midday, switch to streamers along the deep outside bends and undercut banks — big browns will move shallow and feed aggressively ahead of the incoming system. If you see any surface activity during the overcast midday hours, don't hesitate to drop a BWO dry; the cloud cover will extend the hatch window well past its normal peak.
Main Species
Brown Trout
Rainbow Trout
American Shad
Report generated September 20, 2026 — Next update: September 27, 2026