NJ Offshore Fishing ReportWeek of Sep 28 · out of Manasquan Inlet

Tuesday is a clean GO inside — 3-5 knot WSW winds and 2-2.5ft ESE seas at 7 seconds mean any departure time works, and Wednesday holds the same. Take advantage of it, because the best surface signals on this chart are inshore off the Long Island south shore, not at the canyons.

The headline is the Inner Shelf CHL Color Break. This color change has held its position for three days — long enough for phytoplankton to draw bait and bait to draw predators. Chlorophyll steps 4.2x across it, from 0.45 mg/m³ on the cleaner south side to 1.88 mg/m³ on the greener north side, spread over about 15nm, so treat it as a zone rather than a hard line. There's no temperature step across it to speak of — the inshore water sits around 66-67°F on average — so this is purely a bait edge. Work it as one: sight-feeding bonito and false albacore will be on the cleaner southern side looking for bunker and peanut bait spilling out of the greener water, while bluefish will push right into the green side in schools. Run the transition east-west with small metals and epoxy jigs ready for surface breaks, and watch for birds. If the surface is quiet, the three wrecks within 10-12nm of the spot sit in the right 60-200ft range for black sea bass — 138ft at the spot itself.

Farther east, Oregon puts you two miles north of the Oregon wreck on a secondary color change that has held for two days. The green/blue ratio is 3.3x (0.91 to 2.98 mg/m³, green side north over about 16nm) — greener overall than the break to the west, which means more bait but less visibility. A strong thermal front from the front analysis hugs the beach just west of here, and the coolest inshore water on the chart (down near 60°F) sits in a pocket along the shore to the north — cool, bait-rich water that suits early-run striped bass and bluefish working bunker schools. Fish the greener side for bluefish, look for striped bass on any bunker pods near the front, and drop on the Oregon itself for black sea bass in 108ft. Bonito are a realistic bonus on the cleaner side.

Moon-wise, Tuesday is three days past the full, and the moon is still 90% lit — fish have been feeding overnight, so the strongest daytime action should come in the first two hours after sunrise and again in the mid-afternoon, roughly 2-4 PM. The tidal currents will still be running harder than average, so bait will be moving well around the inlets on the run out.

Tuesday is a CAUTION midshore — winds are light, but an east swell crossing a NNW wind-wave sets up an uncomfortable cross-sea with seas dropping from 3.7ft to about 2.6ft, calmest from noon to 6 PM. Wednesday is the clear GO with WNW winds under 9 knots and 2.7-2.9ft east seas at 8 seconds; if you're going anywhere in this zone, that's the day.

The midshore grounds within a normal run of Manasquan — 30-60nm out over the mid-shelf — show no surface breaks worth running to. Chlorophyll is a fairly uniform 0.19-1.02 mg/m³ and the surface temperature warms gently from about 66 to 71°F toward the shelf edge with no tight edges in between. Weak surface current runs generally southwest along the shelf. That's a day to hit your favorite wrecks and hard bottom for black sea bass, which are in season and stacked in the 60-200ft range.

The one flagged spot is the Mid-Shelf SST Gradient, but understand what it is: a broad warming trend, not a line to troll. The temperature rises 1.8°F toward the east, but that change is spread over about 12nm, so you won't find a hard edge to pull baits along. The water here is cool, about 64.5°F at the surface and essentially the same temperature down to 100ft — thoroughly mixed with no thermocline to hold bait at depth. That kind of cool, well-mixed fall water is exactly what the east-end bluefin fishery is built on as the season turns toward October, and it's also prime false albacore, bonito and bluefish water. Surface current is a modest 0.3 knots to the southwest with slight divergence across the gradient, so don't expect a debris line; find the fish with your eyes and your sounder, working slowly over the gradual warming toward the southeast where the 3.6°F broad regime change sits, and troll small spreader bars or run-and-gun with jigs on surface activity. Wrecks 5 and 9.5nm away are your fallback, though at 216ft the spot itself is a bit deep for comfortable sea bass fishing.

At 102nm from Manasquan this is a long haul for a soft signal — it makes more sense for boats already on the east end, and only on Wednesday's weather.

Tuesday is a CAUTION offshore and, practically, a no for a Manasquan boat. Steep 5-6ft chop doesn't ease until after 11 AM, the only viable window is 11 AM to 9 PM, and a confused east-swell-over-WNW-wind-wave cross-sea hangs on all day. At 114nm from the inlet you can't make that window work. Wednesday is the standout — 6-8 knot NW winds, 2.8-3.5ft east seas at 7-8 seconds, any departure time — and Thursday holds a good window until early evening. Plan the offshore trip for Wednesday, or leave Tuesday evening to be on the grounds for the overnight bite once the seas have laid down.

The spot to run to is the Slope Current Convergence, where surface current piles together at 1.1 knots flowing toward the SSW — about 14 miles from the Hudson Canyon over deep slope water. Convergences like this are where floating weed, debris and bait get corralled, and this one sits in the cleanest water on the chart: offshore chlorophyll runs just 0.11-0.21 mg/m³, genuine blue water with the visibility sight-feeding tuna need. The surface here is around 69°F, with the offshore zone topping out near 71.6°F — warm enough for bluefin (the fall canyon run is building) and squarely in the range for bigeye and swordfish, but the surface never quite reaches yellowfin or mahi temperatures, so don't count on them.

The subsurface structure is the real reason to fish here. The warm surface layer holds to about 77ft at 69°F, then the temperature falls fastest between 61 and 155ft, dropping to 60.8°F — 66.7°F at 100ft, 59°F at 200ft, 56°F at 300ft. That steep layer is a barrier where squid and butterfish stack, and it's shallower than the offshore average, a hint of upwelling along the slope. Bigeye hunt just above that barrier: troll the convergence at dawn and dusk with spreader bars and squid-color plugs, and set a chunk drift with butterfish through the evening with baits staged at 60, 100 and 150ft. For swordfish, night drifts with rigged squid at the thermocline depth (100-150ft) are the play, and a daytime deep-drop into the 1000fm+ bottom is a legitimate option while you wait for dark. Keep an eye on the moderate thermal front that runs along the slope west of the convergence — where the SSW current carries surface water across it you may find a rip line with bait.

On the moon: three to four days past full, the fish have been eating at night under a bright moon, so the overnight sword and bigeye bite is the strength of this trip, tapering into a first-light trolling window. Expect a slower midday; save your effort for the mid-afternoon window around 2-4 PM and the evening.