Delaware River Report: July 20, 2026

The release from Cannonsville is 500 cfs. We’ll be a little warmer with sunshine today. Wind will be negligible. There may some wildfire smoke / haze again as the day goes on. Sulphurs, Cahills, Isonychias, olives, and some caddis are all hatching in some numbers. The daytime sulphurs are hatching in Deposit mixed with some olives and a few Isonychias. Smaller seems to be better. Stick to the lower West if you want to nymph. The algae has been bad up top making it a dry fly only game.

Today will be 79 degrees and sunny. Wind will be 5 – 10 mph from the South.


John with a tiger yesterday. Tim Glynn photo

What’s Hatching:
Dark Blue Wing Olive – #16 – 18 – Baetis vagans
Sulphur – 16 – 20 – Ephemerella dorothea
Tan Caddis – #16 – 20 – Hydrosyche sp
Light Cahill – #14 – Epeorus vitreus, Ephemerella invaria, Stenacron spp.
Slate Drake – #12-2xl – 12 – Isonychia bicolor


Click on the gauge links below for the latest flow information.

View the current local weather conditions.

Click on any gauge for the most recent data:
West Branch at Stilesville, NY507 cfs46°
West Branch at Hale Eddy, NY586 cfs46°
East Branch at Harvard, NY195 cfs57°
East Branch at Fishs Eddy, NYN/A N/A
East Branch at Hancock, NY464 cfs66°
Mainstem at Lordville, NY1,210 cfs65°
Beaverkill at Cooks Falls, NY175 cfs64°
West Branch at 191 Bridge56°
West Branch at Walton (Cannonsville inflow)438 cfs64°
Cannonsville Reservoir Release500 cfs
Cannonsville Reservoir Capacity78.9%
Pepacton Reservoir Capacity87.1%

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