Delaware River Report: August 19, 2026

The release from Cannonsville is 549 cfs. We’ll start off with some sun today but should see some clouds move in during the afternoon. Any rain showers shouldn’t affect the flows but should be good to push the olives. The flows are at great levels and the cooler nights are helping the water temps. 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 81 degrees with patchy fog and sun in the morning. Some clouds may move in during the afternoon with a few rain showers. Wind will be 5 – 10 mph from the WSW.


Reza with a nice brown yesterday. 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, NY674 cfs49°
East Branch at Harvard, NY221 cfs56°
East Branch at Fishs Eddy, NYN/A N/A
East Branch at Hancock, NY726 cfs68°
Mainstem at Lordville, NY1,540 cfs66°
Beaverkill at Cooks Falls, NY362 cfs64°
West Branch at 191 Bridge57°
West Branch at Walton (Cannonsville inflow)194 cfs67°
Cannonsville Reservoir Release549 cfs
Cannonsville Reservoir Capacity79.6%
Pepacton Reservoir Capacity91.1%

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