Upper Delaware, New York
West Branch Delaware Fishing Report: August 17, 2026
The West Branch is cold and fishable at Hale Eddy, with 689 cfs, 50.2 F water, a 549 cfs Cannonsville release, and a useful sulphur-and-olive dry-fly window before afternoon thunderstorms become the main safety issue.
- Status
- good
- Flow trend
- stable
- Best window
- Midday through afternoon on the cold upper West Branch, with storms as the cutoff
- Best methods
- dry flies, nymphs, wet flies
Quick Summary
The West Branch remains the best New York trout option in this morning's set. USGS showed 689 cfs, 3.12 feet, and 50.2 F at Hale Eddy at the 9 AM refresh, with a 549 cfs Cannonsville release reported in the current Upper Delaware local report. Wading is limited rather than easy; fish edges, bars, and familiar access points, and avoid unnecessary crossings. The newer local read adds one practical method note: dry-fly fishing is the cleaner play on the upper West Branch where algae is an issue, while nymphing is better left to the lower West. Cloud cover and rain should help the sulphur-and-olive window, but lightning or a hard shower should end the session.
Conditions Snapshot
| Field | Value |
|---|---|
| Status | Good. Cold tailwater temperatures and steady, moderate flow keep the West Branch fishable, with storm timing the main limitation |
| Flow | 689 cfs at Hale Eddy during the 9 AM refresh; Cannonsville release reported at 549 cfs |
| Gauge Height | 3.12 feet at Hale Eddy |
| Water Temp | 50.2 F at Hale Eddy |
| Clarity | Not reported by official gauges; current local context did not point to blown-out West Branch water |
| Trend | Nearly steady at Hale Eddy; local source described only a slight West Branch bump |
| Best Window | Midday into afternoon on the colder upper West Branch; stop for thunder or fast-changing runoff |
| Best Method | Dry flies and emergers on the upper West Branch; nymph lower West seams if the surface is quiet |
| Wadeability | Limited. Stay on softer edges and known bars, and do not push crossings |
Weather
For Hancock and Hale Eddy, the National Weather Service forecast calls for areas of morning fog, a high near 82 F, light west wind, and a chance of showers and thunderstorms from early afternoon through late afternoon. Fog is possible again tonight. The cloud cover is useful for small mayflies, but storms are a real safety constraint; leave the water when thunder is nearby or if side channels begin to color.
River Notes
Hale Eddy changed very little from the 8 AM pass, holding at 689 cfs, 3.12 feet, and 50.2 F at the 9 AM refresh. That keeps the upper West Branch in a good summer tailwater range: enough water for cover and drift boat traffic, cold enough for trout, but not low enough to make wading simple everywhere.
The current Upper Delaware local report added useful same-day detail after the first pass: Cannonsville release was listed at 549 cfs, some sections fished well in yesterday's rain, the West Branch bump was minor, and the stronger Beaverkill rise was the more noticeable change in the system. For the West Branch specifically, treat the upper river as primarily a dry-fly game if algae makes nymphing messy, and save subsurface work for cleaner lower West seams. Expect the upper West to stay colder than the freestones and the mainstem. Fish should be most willing where the current is broken, the light stays soft, and bugs are actually on the water.
Hatch Activity
Official gauges do not report hatches. Current Upper Delaware context supports late-summer sulphurs, small Blue Winged Olives, Isonychias, Light Cahills or summer stenos, Tricos in their usual lower-river areas, and ants during humid weather. The midday sulphur hatch is becoming spottier, but it remains the best daytime dry-fly target on the colder West Branch, with olives mixed in during clouds or rain.
| Hatch | Size | Notes |
|---|---|---|
| Sulphur | 18-20 | Still worth centering the box around on the colder upper West Branch, though the hatch is tapering |
| Blue Winged Olive | 18-24 | Clouds, light rain, and soft water can make olives more important today |
| Isonychia | 10-14 | Useful as a nymph, wet fly, or searching dry in broken bankside current |
| Light Cahill or Summer Steno | 14-16 | Carry for mixed afternoon and evening mayfly activity |
| Trico | 20-24 | Possible in the usual lower West, East Branch, and upper mainstem morning spots |
| Flying Ant and Beetle | 16-20 | Good humid-weather bank options when fish are not fixed on mayflies |
Recommended Flies
| Category | Fly | Size | Notes |
|---|---|---|---|
| Dry | Sulphur Sparkle Dun, CDC Emerger, or Comparadun | 18-20 | First choice when upper-river fish work steadily to sulphurs |
| Dry | BWO Comparadun or CDC Olive | 18-24 | Use in cloudy or rainy windows with small, subtle riseforms |
| Dry | Isonychia Parachute or Light Cahill | 10-16 | Search faster edges when fish are not locked on tiny mayflies |
| Dry | Trico Spinner, Flying Ant, or Beetle | 16-24 | Cover flat-water spinner and terrestrial opportunities |
| Wet | Soft Hackle Pheasant Tail, Soft Hackle Sulphur, or Isonychia Wet | 12-18 | Swing through riffles and broken seams before and during sparse hatches |
| Nymph | Pheasant Tail, Frenchie, or Perdigon | 14-20 | Use a compact rig in clean seams when fish are not feeding on top |
| Nymph | Isonychia Nymph | 10-12 | Let the drift lift or swing near the bank where naturals migrate |
Tactics
Start by watching before casting. If fish are up on the upper West, lengthen the leader, choose one small dry or a dry-and-emerger pair, and make accurate first presentations from downstream or across-and-down angles. If algae is fouling nymph rigs, stay with dries, emergers, or a lightly swung wet fly rather than repeatedly cleaning heavy subsurface gear. Use nymphs mainly in cleaner lower West seams when the surface is quiet. Keep an exit plan for storms; graphite rods, open banks, and thunder do not mix.
Gauge Links
| Gauge | Flow | Temp | Link |
|---|---|---|---|
| WEST BRANCH DELAWARE RIVER AT HALE EDDY NY | 689 cfs | 50.2 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.