Northeast
Big Flat Brook
Live Conditions
Big Flat Brook — Near Flatbrookville, NJ (gauge unverified)
7-Day Flow
↓ Falling
24-Hr Pressure
29.58 inHg · → High/stable
Voluntary Catch-and-Release Advisory
Water temperature is at or above 65°F. At these temperatures trout are physiologically stressed and have a higher post-release mortality rate. Consider waiting for cooler conditions — early morning or evening — or choosing a tailwater with regulated temperatures.
Local Weather
Tough conditions — fish deep
Today
🌤️Partly cloudy
64° / 32°
Tomorrow
☁️Overcast
68° / 39°
Tue
☁️Overcast
69° / 47°
Wed
☁️Overcast
69° / 48°
Cold front incoming — go deep with nymphs, surface activity likely slow.
Weather by Open-Meteo · No API key · Updated every 30 min
What should I fish today?
⚡ AIAI-powered recommendation using today's live flow, temperature, and hatch data.
2
Time of Day
Using: 21.2 CFS · 70°F · Midges and BWOs. Brown trout spawning continues — RESPECT REDDS.
What should I pack?
Rod, flies, tippet, and safety gear specific to today's Big Flat Brook conditions.
🪰 Hatch Calendar
Big Flat Brook · November · Late Fall
🟡 Approaching — within 5°F of trigger range
Select month
Midges and BWOs. Brown trout spawning continues — RESPECT REDDS.
🟢 Active · 🟡 Approaching · ⚪ Seasonal only
River Map
About Big Flat Brook
Big Flat Brook in Sussex County is arguably New Jersey's finest wild trout stream, tumbling through Stokes State Forest in a freestone gradient that holds self-sustaining populations of brown and brook trout alongside stocked fish. The upper reaches are tighter and more classic brook trout water, while the lower sections open up for longer drifts and bigger browns. Its proximity to the Delaware Water Gap and limited access roads keep pressure manageable.
Regulations
Trophy Trout sections in place — check NJDEP for special area boundaries, size limits (typically 15" minimum), and seasonal restrictions. Wild trout in upper reaches are sensitive; handle with care. Standard NJ trout season applies outside trophy sections. NOTE: USGS gauge 01440000 is unverified — flow data may be stale or unavailable; check with local outfitters as backup.
Learn More
Guides to help you fish Big Flat Brook with more confidence.
New Jersey Fishing Regulations for Fly Anglers
NJ freshwater fishing license, the separate Trout Stamp required statewide, the second Saturday in April opener, the Ken Lockwood Gorge fly-only…
Trout Species of New Jersey
NJ's wild brown trout fishery — the Ken Lockwood Gorge on the South Branch Raritan, the limestone-influenced Musconetcong, the Black/Lamington gorge…
How Barometric Pressure Affects Fishing (And How to Use It)
That gorgeous bluebird day after a cold front? Worst fishing of the year. Here's the data behind why pressure changes matter more than the weather…