Upper Delaware, New York
West Branch Delaware Fishing Report: August 31, 2026
The West Branch is cold, steady, and fishable at Hale Eddy, with 576 cfs, 50.4 F water, a 500 cfs Cannonsville release, and showers and thunderstorms now likely through the afternoon.
- Status
- good
- Flow trend
- falling
- Best window
- Cloud cover before storms, shower breaks, and safe evening soft light
- Best methods
- dry flies, wet flies, nymphs
Quick Summary
The West Branch remains the best trout choice in this New York report set. USGS still showed 576 cfs, 2.90 feet, and 50.4 F at Hale Eddy during the 9 AM refresh, and current Upper Delaware source context reported a 500 cfs Cannonsville release. Cloud cover, light wind, and showers should help olives, ants, Isonychias, Cahills, hebes, and a few late sulphurs, but the National Weather Service now has showers and thunderstorms likely this afternoon, so build the day around safe access and easy exits. Wade conservatively at Hale Eddy and avoid forcing heavy nymph rigs in the upper river if algae keeps fouling the flies.
Conditions Snapshot
| Field | Value |
|---|---|
| Status | Good. Cold tailwater temperatures, moderate flow, and current hatch activity make the West Branch the strongest trout option today |
| Flow | 576 cfs at Hale Eddy during the 9 AM refresh |
| Gauge Height | 2.90 feet at Hale Eddy |
| Water Temp | 50.4 F at Hale Eddy |
| Clarity | Not reported by official gauges; current local context keeps the West Branch in fishable shape |
| Trend | Slightly falling compared with yesterday morning |
| Best Window | Cloud cover before storms, shower breaks, and evening soft light only if lightning is clear of the valley |
| Best Method | Dry flies and emergers for olives, ants, Isonychias, Cahills, hebes, and late sulphurs; wet flies or light nymphs where the bottom stays clean |
| Wadeability | Limited. Use known gravel, softer edges, and conservative crossings; boats still cover more water efficiently |
Weather
For Hancock and Hale Eddy, the National Weather Service 9 AM update calls for a high near 76 F, very light south wind, and showers and thunderstorms through the afternoon, with precipitation chances rising sharply after early afternoon. The hourly forecast shows patchy fog at 9 AM, scattered showers late in the morning, then showers and thunderstorms by midafternoon; tonight also keeps showers and thunderstorms likely. The weather setup favors small mayflies and low-light dry-fly work, but leave the river when thunder is close and watch for a bump in flow if the drainage gets heavier rain than forecast.
River Notes
Hale Eddy is a touch lower than yesterday morning and still in a comfortable tailwater range. The water temperature is well below trout-stress territory, and the 500 cfs release gives fish cover along banks, riffle edges, slicks, and foam seams without making the river unfishable. This is a good day to slow down and watch before stepping in: clouds and damp weather can make the best fish show themselves.
Current local context points to an olive-friendly day, with enough late-summer variety that anglers should not get locked into one hatch. The upper West Branch algae note still matters. If a nymph rig comes back dirty every few casts, switch to dries, emergers, wets, or a cleaner lower-river lane instead of adding more weight.
Hatch Activity
Official gauges do not report hatches. Current Upper Delaware source context supports Blue Winged Olives, flying ants, sporadic late Sulphurs near Deposit, Isonychias, Light Cahills or Summer Stenos, hebes, and tan caddis.
| Hatch | Size | Notes |
|---|---|---|
| Blue Winged Olive | 16-24 | Best under clouds, damp air, shaded slicks, and softer seams; carry both larger olives and small technical patterns |
| Flying Ant | 18-24 | Late-summer search pattern along banks, foam lines, and quiet tailouts; not always heavy, but important when trout key on them |
| Sulphur | 16-20 | Late, sporadic, and most relevant around Deposit or evening tailwater fish |
| Isonychia or Slate Drake | 10-14 | Blind-cast dries, wets, or swimming nymphs along broken banks and riffle edges |
| Light Cahill, Summer Steno, or Hebe | 14-18 | Useful for mixed evening rise forms and searching faster edges |
| Tan Caddis | 16-20 | Fish pupa, soft hackles, or sparse dries around riffles and shaded seams |
Recommended Flies
| Category | Fly | Size | Notes |
|---|---|---|---|
| Dry | BWO Comparadun, CDC Olive, or olive emerger | 16-24 | Use on shaded slicks, foam seams, and small olive feeders |
| Dry | Flying Ant, foam ant, or small beetle | 18-24 | Fish banks and tailouts before changing flies repeatedly |
| Dry | Sulphur Sparkle Dun or emerger | 16-20 | Keep ready for scattered late sulphur feeders rather than making it the whole plan |
| Dry | Isonychia Parachute, Slate Drake, Light Cahill, Summer Steno, or hebe imitation | 10-18 | Cover broken banks and mixed larger mayfly activity |
| Wet | Soft Hackle Pheasant Tail, Isonychia Wet, or partridge soft hackle | 12-18 | Swing riffle tails and bank seams when rises are scattered |
| Nymph | Pheasant Tail, Frenchie, caddis pupa, or Isonychia Nymph | 12-20 | Use where the bottom stays clean; check often for algae, especially up top |
| Streamer | Small olive or black sculpin, Woolly Bugger, or sparse baitfish pattern | 4-8 | Worth a short shower-window test, especially from a boat, but do not ignore visible risers |
Tactics
Start by watching banks, foam seams, and slicks for olives or ants. Fish a long leader with a single dry or a dry-and-emerger setup when trout are showing. If the rise is broken, an Isonychia dry or a swung wet fly can cover water without dredging algae. Keep an eye on the sky, and get off the water during thunderstorms.
Gauge Links
| Gauge | Flow | Temp | Link |
|---|---|---|---|
| WEST BRANCH DELAWARE RIVER AT HALE EDDY NY | 576 cfs | 50.4 F | USGS 01426500 |
Sources
Official sources checked: USGS station 01426500 and the National Weather Service forecast for the Hancock and Hale Eddy, NY area. This report is an original Custom FlyBox summary based on current official gauge and weather data, with local public conditions reports reviewed separately for hatch, method, clarity, and safety context.