Fluke and sea bass keep Raritan Bay boats busy as bonito push in

What's biting

What's next

Look for the fluke bite to keep splitting the difference between grind and reward through the next few days. Capt. Ron's Atlantic Highlands boat has been power drifting to find catchable current when the natural drift stalls, and that read likely applies bay-wide: shorts will outnumber keepers on slack water, but working structure and channel edges on moving tide should keep producing fish in the 4-to-5-pound class like the ones weighed in this week. Sea bass have been the more reliable producer on Capt. Ron's drops, loaded on nearly every one, and that pattern typically holds as water starts to trend cooler heading toward fall.

The bigger story for the next stretch is the warm-water push of Spanish mackerel and bonito. Grumpys Tackle in NJ flagged the arrival and pointed anglers toward epoxy jigs, and OTW Northern New Jersey's most recent report (August 20) backs that up with mackerel and bonito showing in the surf alongside a steady pick of keeper fluke on the ocean side. If that warm pulse holds through the waxing gibbous moon and into the full moon, expect the mackerel/bonito window to widen rather than close over the next several days, with moving tide near the inlet the likelier window to intercept bait pushes.

Bluefish should stay mixed into that same bait, following the pattern The Fisherman's Northern NJ desk describes aboard the Golden Eagle, where slammers showed up alongside bonito and Spanish mackerel in the same stops. Anglers working bottom structure can expect sea bass, tog, and the occasional trigger to keep rods bending alongside fluke, per the same report out of the Big Mohawk III.

Midshore bluefin remain part of the picture up the coast, though OTW Northern New Jersey describes that jig bite as hit or miss right now rather than a sure thing, so treat any tuna trip as a bonus rather than the primary target this weekend. Anyone planning around the moon should note the waxing gibbous is building toward full, which typically means stronger tidal exchange and more consistent bait movement, a better window for both bay bottom-fishing and inlet/surf action chasing mackerel and bonito as the week progresses. A stable stretch of moving tide paired with the strengthening moon phase is usually when these mixed bags turn into more consistent action rather than scattered pickups.

Context

Late August in Raritan Bay and around Sandy Hook typically means a transition period: summer staples like fluke and sea bass stay active while the first pulses of fall migrants start mixing in. The Spanish mackerel and bonito showing up now, flagged by Grumpys Tackle and confirmed in OTW Northern New Jersey's recent reports, line up with the seasonal calendar for this stretch of the Jersey Shore. Farther north, Saltwater Edge Blog (RI) describes a similar pattern working up the coast, with bonito and early Spanish mackerel appearing ahead of the false albacore run, a useful marker for what often follows this same window in New Jersey waters.

The fluke fishing described this week, best characterized by Capt. Ron's mixed results of plenty of shorts with occasional quality keepers rather than wide-open action, is fairly typical grind for this stage of the season, when pressure has been sustained since spring and the easy fish have thinned out. Sea bass loading up on nearly every drop is a stronger showing than the fluke side, and lines up with reports across Northern NJ boats like the Big Mohawk III and Skylarker of steady sea bass mixed with tog and the occasional trigger.

No direct year-over-year comparison is available in this week's sources to say definitively whether the mackerel/bonito arrival is early, late, or on-schedule relative to past seasons, so treat that as a general seasonal read rather than a confirmed trend. What is consistent across sources is the mixed-bag character of the current bite, several species stacked together rather than one dominant pattern, typical as the calendar turns toward the fall transition.