Delaware River Report: August 31, 2025

The release from Cannonsville is 854 cfs. The release was most likely bumped up again to meet the 1,750 cfs flow target at Montague, NJ. There are still places to comfortably wade at this level but use caution. The cool nights have helped the water temps throughout the system and a lot of water has opened back up. The freestones could use some rain though. Olives, Isonychias, and Cahills are still hatching the afternoons and evenings. Some river sections are seeing the hebes and some Tricos.

Today will be 74 degrees and mostly sunny. Winds will be 5 – 10 mph from the North.

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, NY783 cfs49°
West Branch at Hale Eddy, NY895 cfs49°
East Branch at Harvard, NY163 cfs52°
East Branch at Fishs Eddy, NY241 cfsN/A
East Branch at Hancock, NY60°
Mainstem at Lordville, NY1,110 cfs57°
Beaverkill at Cooks Falls, NY70 cfs58°
West Branch at 191 Bridge51°
West Branch at Walton (Cannonsville inflow)66 cfs59°
Cannonsville Reservoir Release854 cfs
Cannonsville Reservoir Capacity73%
Pepacton Reservoir Capacity82.9%
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