Upper Delaware, New York
West Branch Delaware Fishing Report: July 18, 2026
The West Branch remains the strongest trout option in this New York set, with cold, steady release water, active sulphurs and olives, and afternoon rain or thunder as the main timing risk.
- Status
- good
- Flow trend
- stable
- Best window
- Midday sulphurs on the cold upper West Branch, then the evening window if storms stay away
- Best methods
- dry flies, wet flies, nymphs
Quick Summary
The West Branch is still the best trout option in this morning's New York report set. USGS showed 547 cfs and 46.6 F at Hale Eddy, with Stilesville at 507 cfs and 45.7 F during the morning check, so the upper tailwater has cold, fishable water. Current Delaware reporting lists a 500 cfs Cannonsville release, sulphurs, olives, Isonychias, light Cahills, and tan caddis, with upper-river algae still making dry flies and wets cleaner than nymph rigs in Deposit-area water. Watch the radar this afternoon because the National Weather Service has high rain chances and possible thunder in the forecast.
Conditions Snapshot
| Field | Value |
|---|---|
| Status | Good on the cold West Branch tailwater; storms and upper-river algae are the main constraints |
| Flow | 547 cfs at Hale Eddy; 507 cfs at Stilesville |
| Gauge Height | 2.84 feet at Hale Eddy; 8.08 feet at Stilesville |
| Water Temp | 46.6 F at Hale Eddy; 45.7 F at Stilesville during the morning USGS check |
| Clarity | Not reported by official gauges; local Delaware reporting notes algae on the upper West Branch |
| Trend | Stable release-driven flow profile through the upper West Branch morning gauges |
| Best Window | Midday sulphurs on the cold upper West Branch, then the evening window if storms stay away |
| Best Method | Dry flies and wets on the upper river; nymph lower West Branch lanes if algae is less troublesome |
| Wadeability | Limited. Flows are fishable, but use care around heavier seams and avoid broad crossings |
Weather
For Hancock and Hale Eddy, the National Weather Service forecast calls for a high near 82 F with areas of smoke and showers likely, including a high precipitation chance late morning into afternoon. Wind should build from the southwest at 2 to 7 mph, which is manageable, but thunderstorms are the safety watch. Tonight is forecast near 59 F with patchy smoke and lingering showers. Fish early enough to stay ahead of lightning risk, and leave open water when thunder is close.
River Notes
The current tailwater setup is favorable for July: cold water at Stilesville and Hale Eddy, a steady release, and enough flow to keep the main lanes moving without making the river a boat-only proposition. The practical adjustment is algae. If nymph rigs come back fouled in the upper river, switch to visible dry-fly targets, swing soft hackles through clean seams, or move downriver where subsurface work is less frustrating. The cold upper West Branch gives trout anglers a responsible option while nearby freestones warm, but carry a thermometer if you leave the release influence and stop targeting trout before water approaches 68 F.
Hatch Activity
Current Delaware reporting supports a summer tailwater box: sulphurs remain the main upper-river mayfly, with olives, Isonychias, light Cahills, tan caddis, and evening spinners also in play. Cloud cover and rain may improve olive and emerger activity, but thunderstorms can end the window quickly.
| Hatch | Size | Notes |
|---|---|---|
| Sulphur | 16-20 | Main upper West Branch hatch; carry duns, emergers, cripples, and soft hackles |
| Blue Winged Olive | 16-24 | Olives can mix with sulphurs, especially with smoke, cloud cover, or rain nearby |
| Light Cahill | 14-16 | Useful pale dry for softer evening water and broken seams |
| Isonychia | 10-12 | Fish nymphs and wets near riffle edges; keep a larger dry ready |
| Tan Caddis | 16-20 | Pupa and soft hackles can fill the gaps between mayfly pushes |
| Rusty Spinner | 14-20 | Worth carrying for calm last light if storms clear out |
| Ants and Beetles | 14-20 | Bank-side summer backup when the hatch is uneven |
Recommended Flies
| Category | Fly | Size | Notes |
|---|---|---|---|
| Dry | Sulphur Sparkle Dun, Comparadun, or CDC Emerger | 16-20 | Primary match for upper-river sulphur fish |
| Dry | BWO Comparadun or CDC Dun | 18-24 | Use for smaller olive fish in slicks and shaded lanes |
| Dry | Light Cahill or White Wulff | 14-16 | Visible pale mayfly and broken-water searching option |
| Dry | Isonychia Parachute or Comparadun | 10-12 | Larger profile for riffles and heavier seams |
| Dry | Rusty Spinner | 14-20 | Keep ready if the evening calms after rain |
| Dry | Ant or Beetle | 14-20 | Summer bank option between hatch windows |
| Nymph | Pheasant Tail, Frenchie, or Split-Back Mayfly | 14-18 | Better on cleaner lower-river lanes if upper algae fouls rigs |
| Nymph | Isonychia Nymph | 10-12 | Work riffle edges and finish with a controlled swing |
| Wet | Soft Hackle Sulphur or Soft Hackle Pheasant Tail | 14-18 | Good emerger choice when fish flash under naturals |
| Nymph | Tan Caddis Pupa | 16-18 | Useful dropper below a larger dry or between mayfly pushes |
Tactics
Start by looking for heads on the cold upper river before committing to a nymph rig. If sulphurs or olives are on the water, fish a single dry or a dry with a small emerger dropper and keep the drift clean through the soft lanes. If you need to fish subsurface, choose lower West Branch water or cleaner seams where algae is not the whole story. Keep rain gear handy, watch radar, and get off the river immediately if thunder develops.
Gauge Links
| Gauge | Flow | Temp | Link |
|---|---|---|---|
| WEST BRANCH DELAWARE RIVER AT HALE EDDY NY | 547 cfs | 46.6 F | USGS 01426500 |
| WEST BRANCH DELAWARE RIVER AT STILESVILLE NY | 507 cfs | 45.7 F | USGS 01425000 |
Sources
Official sources checked: USGS stations 01426500 and 01425000, plus 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, release, method, clarity, and safety context.