Delaware River Report: August 23, 2025

The release from Cannonsville is 593 cfs. We’re in a stretch of warm, sunny weather for a few days. The midday hatching has been sporadic, with most of the action happening in the evening. Try blind casting Isos or Cahills in the riffles, and have your olives and spinners ready for the evening.

Today will be 82 degrees and sunny. Winds will be 10 – 15 mph from the South.

What’s Hatching:
Slate Drake – #12-2xl – 12 – Isonychia bicolor
Light Cahill – #14 – Epeorus vitreus (male), Ephemeralla rotunda, Ephemerella invaria
Pale Evening Dun – #14 – Epeorus vitreus (female)
Sulphur – #16 – 20 – Ephemerella dorothea
Dark Blue Wing Olive – #16 – 18 – Baetis spp.
Tan Caddis – #16 – 18 – Hydropsyche spp.
Tiny Blue Wing Olive – #22 – 26 – Pseudocloeon sp.


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, NY542 cfs47°
West Branch at Hale Eddy, NY653 cfs49°
East Branch at Harvard, NY172 cfs55°
East Branch at Fishs Eddy, NY273 cfsN/A
East Branch at Hancock, NY67°
Mainstem at Lordville, NY919 cfs63°
Beaverkill at Cooks Falls, NY88 cfs64°
West Branch at 191 Bridge56°
West Branch at Walton (Cannonsville inflow)110 cfs65°
Cannonsville Reservoir Release593 cfs
Cannonsville Reservoir Capacity76.1%
Pepacton Reservoir Capacity85.4%
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