Delaware River Report: August 20, 2026

The release from Cannonsville is 549 cfs. Today looks like another good day to be on the water with a few rain showers and light wind. Looks like a good olive day. Some people have had some suscess blind casting Isonychias and Cahills too. There are some flying ants around so keep a few in your box just in case. The mid day sulphurs are getting a bit spotty as the hatch wanes but there still are some out there. There are some olives mixed in plus a few Isonychias and Cahills. 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 71 degrees with a few showers early becoming steadier in the afternoon Total rainfall should be .35″. Wind will be light and variable.


Dan towards sunset. Peyton Van der LInden 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, NY560 cfs48°
West Branch at Hale Eddy, NY663 cfs49°
East Branch at Harvard, NY213 cfs56°
East Branch at Fishs Eddy, NYN/A N/A
East Branch at Hancock, NY636 cfs68°
Mainstem at Lordville, NY1,420 cfs65°
Beaverkill at Cooks Falls, NY311 cfs64°
West Branch at 191 Bridge60°
West Branch at Walton (Cannonsville inflow)176 cfs67°
Cannonsville Reservoir Release549 cfs
Cannonsville Reservoir Capacity79.4%
Pepacton Reservoir Capacity90.8%

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