Catskills, New York
Beaverkill-Willowemoc Fishing Report: July 17, 2026
The Beaverkill-Willowemoc remains a warm-water caution report, with low flows, the Beaver Kill already near 67 F in the morning, and recent official readings showing both freestones warming hard by afternoon.
- Status
- tough
- Flow trend
- falling
- Best window
- Thermometer-first at dawn only, then move to cold tailwater before the freestones warm further
- Best methods
- resting warm freestone trout, thermometer-first trout fishing, cold tailwater
Quick Summary
The Beaverkill-Willowemoc is still a conservation-first trout report. USGS showed the Beaver Kill at Cooks Falls at 125 cfs and 66.6 F during the morning check, while the Willowemoc near Livingston Manor was 28.4 cfs and 61.2 F. Those dawn numbers look better than yesterday, but the last 24 hours still reached 75.0 F on the Beaver Kill and 72.3 F on the Willowemoc, so the safe window is short. If you fish the Catskills today, make the thermometer the first tool out of the pack, keep any freestone trout effort to verified cold water at dawn, and move to cold tailwater before the sun builds.
Conditions Snapshot
| Field | Value |
|---|---|
| Status | Tough and temperature-limited for trout; morning temperatures are close enough to the stress line that afternoon fishing is not responsible |
| Flow | 125 cfs at Cooks Falls on the Beaver Kill; 28.4 cfs near Livingston Manor on the Willowemoc |
| Gauge Height | 1.23 feet at Cooks Falls; 1.87 feet near Livingston Manor |
| Water Temp | 66.6 F on the Beaver Kill and 61.2 F on the Willowemoc during the morning USGS check; both gauges exceeded 70 F in the last 24 hours |
| Clarity | Not reported by official gauges; low summer freestone flow and temperature are the controlling details |
| Trend | Low and slightly falling on both gauges over the last 24 hours |
| Best Window | Thermometer-first at dawn only, then move to cold tailwater before the freestones warm further |
| Best Method | Do not press warm trout water. Fish cold release water instead, or choose non-trout warmwater options |
| Wadeability | Good from a footing standpoint, but temperature controls whether trout fishing is responsible |
Weather
For Roscoe and Livingston Manor, the National Weather Service forecast calls for patchy smoke early, then mostly sunny skies and a high near 79 F. Wind should be light from the northwest at 1 to 6 mph. Tonight is forecast partly cloudy with a low around 58 F, and Saturday brings a better shower and thunderstorm chance. The cooler morning helps, but the freestones have shown they can climb above 70 F by afternoon, so air temperature alone should not set the fishing plan.
River Notes
The gauges are low, clear-looking from a flow standpoint, and easy enough to wade, but that is not the main issue. The Beaver Kill started the morning just below the 68 F caution line and warmed to 75 F yesterday. The Willowemoc was cooler this morning but also exceeded 70 F over the last 24 hours. Recent Catskills reporting has continued to point anglers away from warm freestones and toward colder tailwaters during this summer pattern. The summer Horton Brook thermal closure on the Beaverkill remains in effect from Iron Bridge at Horton downstream to the first Route 17 overpass, where angling is prohibited July 1 through August 31.
Hatch Activity
The summer Catskills box still includes sulphurs, olives, Isonychias, light Cahills, tan caddis, yellow sallies, terrestrials, and rusty spinners, but today those flies belong on cold water. Do not chase rises in freestone water that is near or above 68 F. If a shaded reach is safely cold at dawn, keep the session short and stop as soon as the temperature starts climbing.
| Hatch | Size | Notes |
|---|---|---|
| Blue Winged Olive | 18-22 | Relevant on cold tailwater or verified cool shaded water, not warming Beaverkill pools |
| Sulphur | 16-20 | Better matched on cold release water today than on warm freestone reaches |
| Light Cahill | 14-16 | Carry for colder alternatives and evening water only if temperatures remain safe |
| Isonychia | 10-12 | A useful searching bug on cold riffle edges and tailwaters |
| Tan Caddis | 16-18 | Pupa and soft hackles can work where water temperatures stay safe |
| Yellow Sally | 14-16 | Worth having for cold broken water |
| Ants and Beetles | 14-20 | Good summer bank patterns, but only where trout water is cold enough |
| Rusty Spinner | 14-20 | Skip the freestone spinner game unless water is safely below 68 F |
Recommended Flies
| Category | Fly | Size | Notes |
|---|---|---|---|
| Dry | BWO Comparadun or CDC Dun | 18-22 | Use on cold tailwater or verified safe water only |
| Dry | Sulphur Comparadun or Sparkle Dun | 16-20 | Better fit for cold release water today |
| Dry | Light Cahill or Parachute Adams | 14-16 | Visible searching dry for colder alternatives |
| Dry | Isonychia Parachute | 10-12 | Prospecting fly where temperatures are safe |
| Dry | Yellow Sally | 14-16 | Cold riffle option when stoneflies are active |
| Dry | Ant or Beetle | 14-20 | Summer bank option for cold water |
| Dry | Rusty Spinner | 14-20 | Only for evening water verified below the trout-stress line |
| Nymph | Pheasant Tail or Frenchie | 14-18 | For cold-water alternatives or verified safe freestone water |
| Nymph | Isonychia Nymph | 10-12 | Use on cold riffle edges and seams |
| Wet | Soft Hackle Pheasant Tail or Partridge and Yellow | 14-18 | Useful where trout water is cold enough to fish responsibly |
| Nymph | Tan Caddis Pupa | 16-18 | Dropper option for colder water |
Tactics
Do not assume the river is safe because the first reading looks barely acceptable. Check the exact water you plan to fish before casting, then keep checking as the sun gets higher. If the water is 68 F or warmer, do not target trout. If a shaded reach is safely colder at dawn, fish lightly, land fish quickly, keep them wet, and leave before the temperature rises. For a normal trout outing, drive to cold release water rather than trying to make a low, warming freestone hold up through a smoky July day.
Gauge Links
| Gauge | Flow | Temp | Link |
|---|---|---|---|
| BEAVER KILL AT COOKS FALLS NY | 125 cfs | 66.6 F | USGS 01420500 |
| WILLOWEMOC CREEK NR LIVINGSTON MANOR NY | 28.4 cfs | 61.2 F | USGS 01419500 |
Sources
Official sources checked: USGS stations 01420500 and 01419500, plus the National Weather Service forecast for the Roscoe and Livingston Manor, 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, access, method, regulation, and safety context.