Delaware River Report: August 8, 2025

The release from Cannonsville is 500 cfs. We had a very brief but heavy rain shower yesterday afternoon but the river flows didn’t budge and the rain was absorbed in to the ground. Today looks like a repeat of yesterday. We’ll have sun and light wind. The Upper West Branch was mostly small olives yesterday with a few sulphurs. There is algae so if you want to nymph stay on the lower West. We’ve also had some hatchng towards dark on the lower West. Mainly olives with some Isonychias and a few Cahills mixed in.

The Beaverkill, Lower East Branch, and Mainstem water temps are still peaking in the mid to high 70’s. It’s time to give these rivers a break until they cool back down.

Today will be 81 degrees and partly cloudy. Wind will be 5 – 10 mph from the South.

It’s that time of year. August 15 – 16. Let’s clean up the river!

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, NY462 cfs46°
West Branch at Hale Eddy, NY547 cfs48°
East Branch at Harvard, NY180 cfs57°
East Branch at Fishs Eddy, NY317 cfsN/A °
Mainstem at Lordville, NY1,010 cfs65°
Beaverkill at Cooks Falls, NY152 cfs67°
West Branch at 191 Bridge57°
West Branch at Walton (Cannonsville inflow)89 cfs70°
Cannonsville Reservoir Release500 cfs
Cannonsville Reservoir Capacity83.6%
Pepacton Reservoir Capacity89.1%
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