Delaware River Report: May 31, 2025

We have a steady rain falling that started overnight. The river flows are bumping and some of the feeders are putting some color in to the main rivers. Click on the river gauge links below and watch the radar for the latest information. So this looks like a nymph and streamer day. If the afternoon showers are sparse enough after the main rain ends there may be some hatches if the rivers stay in good shape. But count on streamers and nymphs. If the flows or conditions change dramatically we’ll do an updated post.

Today will be 56 degrees with steady rain this morning and showers in the afternoon. Total rainfall should be .66″. Wind will be 10 – 20 mph from the North.

Beth with a nice one yesterday. Steve Shen photo
Jack had a good afternoon. Mike Daccurzio photo
Chris with a dry fly fish. Tim Glynn photo
Billy found some yesterday. Chris Brown photo
Paul with one yesterday. Sean Witman photo

What’s Hatching:
March Brown – #10-2xl – Maccaffertium vicarium
Gray Fox – #12-2xl – Maccaffertium vicarium
Light Cahill – #14 – Epeorus vitreus (male), Ephemeralla rotunda, Ephemerella invaria
Pale Evening Dun – #14 – Epeorus vitreus (female)
Sulphur – #16 – Ephemerella dorothea
Dark Blue Wing Olive – #16 – 18 – Baetis spp.
Green Drake – #8-2xl – Ephemera guttalata
Brown Drake – #10-2xl – Ephemera simulans
Dark Grannom – #16 – Dark Brachycentrus
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, NY542 cfs43°
West Branch at Hale Eddy, NY838 cfs46°
East Branch at Harvard, NY292 cfs54°
East Branch at Fishs Eddy, NY918 cfsN/A °
Mainstem at Lordville, NY2,170 cfs59°
Beaverkill at Cooks Falls, NY527 cfs58°
West Branch at 191 Bridge53°
West Branch at Walton (Cannonsville inflow)516 cfs59°
Cannonsville Reservoir Release 600 cfs
Cannonsville Reservoir Capacity99.9%
Pepacton Reservoir Capacity99.6%
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