Delaware River Report: September 10, 2026

The release from Cannonsville is 475 cfs. there were a few passing rain showers overnight but not enough to bump the flows. The West Branch has a greenish tint to it that is likely the reservoir turning. The fish and bugs don’t mind it and its actually better for streamer fishing. Yesterday was mostly tiny olives #20 – 26 with some flying ants. There were a few Cahills in the afternoon and some people found Iso spinners at dark. Nymphs and wets have been putting some fish in the net too.

Today will be 79 degrees and partly cloudy by the afternoon. Wind will be 10 – 15 mph from the North.


Peter with a nice one at dark. Sean Witman 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, NY499 cfs50°
West Branch at Hale Eddy, NY653 cfs54°
East Branch at Harvard, NY238 cfs55°
East Branch at Fishs Eddy, NYN/A N/A
East Branch at Hancock, NY875 cfs63°
Mainstem at Lordville, NY1,770 cfs62°
Beaverkill at Cooks Falls, NY409 cfs62°
West Branch at 191 Bridge58°
West Branch at Walton (Cannonsville inflow)231 cfs65°
Cannonsville Reservoir Release 475 cfs
Cannonsville Reservoir Capacity77.7%
Pepacton Reservoir Capacity85.6%

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