Potomac River Fly Fishing Report - September 20, 2026

Fly Fishing Report

POTOMAC RIVER

Report
SEP 20 — 27, 2026
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Flow
1380CFS
POTOMAC RIVER AT POINT OF ROCKS, MD
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Water Temp
77.2°F
Updated 2026-09-20
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Weather
61–82°F
Cloudy
💧
Clarity
Clear
Check post-storm
Water temperature is 77.2°F — warm but dropping toward fall feeding thresholds — with flow at 1,380 cfs and gauge height at 1.11 ft, down significantly from last week's 1,870 cfs, meaning the river is low, clear, and demanding precise presentations. Thunderstorms are likely through Sunday afternoon, so plan to fish early and be off the water before midday.
Hatch Chart
Insect Size Activity Prime Time
Caddis 16-20 Moderate 6 AM - 9 AM
Blue-Winged Olive (Baetis) 18-22 Moderate 9 AM - 12 PM
Terrestrials (Ants, Hoppers) 12-16 Heavy 10 AM - 2 PM
Midges 20-24 Light 7 AM - 10 AM
Sculpin / Baitfish 4-8 Moderate 5:30 AM - 8 AM
Best Time Window
  • 5:30 AM - 9:00 AM: Prime streamer and hopper window before heat and storm threat build; target rocky flats and current seams.
  • 9:00 AM - 11:30 AM: BWO and caddis surface activity under cloudy skies; fish slow tail-outs and glassy flats with dry flies.
  • 6:00 PM - Dusk: If storms clear by evening, bass will be active again along structure and bank edges — swing a Poacher or strip a Sparkle Minnow in the fading light.
Guide's Tip
From the benchWith the river running low and clear at 1,380 cfs, stealth is everything — approach wading runs from downstream, keep a low profile, and extend your leader to at least 9 feet with a 4X tippet for surface work. Focus your morning session on rocky flats and current seams between 5:30 and 10 AM before the storm threat builds; smallmouth will be actively feeding in the overcast pre-front conditions. If you're throwing streamers, work the Coffey's Sparkle Minnow or Sculpzilla on a sink-tip with a slow, bottom-hugging retrieve — pause it behind every boulder and let it breathe before the next strip. Get off the water by noon ahead of Sunday's thunderstorms and plan a follow-up session Monday morning when the river may be slightly stained and fish are fired up post-front.
Main Species
Smallmouth Bass
Largemouth Bass
Striped Bass
Report generated September 20, 2026 — Next update: September 27, 2026