Delaware River Report: September 25, 2025

The release from Cannonsville is 350 cfs. It looks like we have a lot of rain coming in so keep an eye on the radar and use the gauge links below for the latest flow information. The weather reports have been changing a lot but the latest have us between one and two inches of rain. Yesterday’s rain bumped the river flows slightly. There were some olives yesterday but most people were nymphing or throwing streamers.

Today will be 70 degrees with clouds and periods of rain. Total rainfall could be between 1 and 2 inches.



Eustace with a walleye on a streamer. Mike Daccurzio photo

What’s Hatching:
Slate Drake – #12 – 14 – Isonychia bicolor
Light Cahill – #14 – Epeorus vitreus (male), Ephemeralla rotunda, Ephemerella invaria
Heptagenia hebe – #18 – 20 – Olive Sulphur
Dark Blue Wing Olive – #16 – 18 – Baetis spp.
Tan Caddis – #16 – 18 – Hydropsyche spp.
Tiny Blue Wing Olive – #22 – 26 – Pseudocloeon sp.
Flying Ant – #16 – 22


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, NY378 cfs55°
West Branch at Hale Eddy, NY394 cfs57°
East Branch at Harvard, NY153 cfs55°
East Branch at Fishs Eddy, NY230 cfsN/A
East Branch at Hancock, NY65°
Mainstem at Lordville, NY671 cfs62°
Beaverkill at Cooks Falls, NY77 cfs64°
West Branch at 191 Bridge60°
West Branch at Walton (Cannonsville inflow)73 cfs65°
Cannonsville Reservoir Release350 cfs
Cannonsville Reservoir Capacity58.6%
Pepacton Reservoir Capacity73.7%
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