Delaware Bay flounder limits stack up as weakfish push back in

What's biting

What's next

With no live buoy or gauge readings feeding this update, the near-term read leans on what the shops and boats are actually seeing rather than a temperature trend line — but the pattern across multiple Delaware Bay reports points the same direction: flounder holding deep and biting well, and a second-tier bite of croaker, spot and weakfish filling in around it. Expect that to hold through the next few days barring a weather blowout, since the EP Tower bite Higbee's described this week sounded broad-based across boat types rather than a one-day fluke.

Watch weakfish closest. Per The Fisherman's NJ/DE Surf report, they were suspiciously absent all spring and summer and only just showed up along the bay coastline — that kind of late arrival often builds through early September before tailing off, so anglers working bloodworms and jigs around jetty tips and rocky points have a window worth chasing now rather than waiting.

Offshore, Eric Burnley notes boats running out are already bringing back tilefish and tuna, and Hook 'em and Cook 'em's report from the Old Grounds and Fenwick Shoal (Spanish mackerel and small bluefish on trolled spoons) suggests that action should keep building — Hook 'em and Cook 'em specifically flags September as a period when Old Grounds species 'seem to improve in size and quantity,' which lines up with the seasonal push most Delaware Bay species see as water starts to cool.

On tides, the Last Quarter moon sets up moderate swings rather than the extremes of a new or full moon — a reasonable window for structure fishing at Port Mahon's reef sites without dealing with the strongest currents of the month. Anyone targeting croaker or spot around Woodland Beach pier should plan around whichever tide stage puts moving water over structure, since that's the pattern described in this week's bait-and-tackle reports.

No striped bass bite of note showed up in this week's Delaware Bay-specific reports beyond scattered small fish at pier structure, so surf and pier anglers targeting linesiders should treat that as a slow lane for now and lean on the flounder and weakfish bite instead.

Context

Delaware Bay's early-September stretch is typically a transition period — summer flounder and croaker/spot action from the warm months are still going while the first hints of the fall push (weakfish, bigger bluefish, cooling-water species) start to layer in, and this week's reports read as on-schedule for that pattern rather than early or late. The EP Tower flounder bite Higbee's described, with limits and pool fish up to 25 inches, is a strong showing for this time of year, and Hook 'em and Cook 'em's note that Old Grounds species 'improve in size and quantity' through September suggests the offshore/reef bite is expected to build rather than fade from here.

The one regulatory note worth flagging: Delaware's recreational striped bass summer slot limit was revised to 20-24 inches for compliance with the ASMFC plan, per Delaware Surf Fishing's coverage of the DNREC announcement — anglers keeping stripers from bay piers or the surf should check current state regulations before harvesting, since slot limits like this are subject to further revision.

Beyond that, there isn't a strong same-source, prior-period comparison available in this week's feed to say definitively whether the weakfish return is running ahead of or behind a typical year — The Fisherman's NJ/DE Surf report frames it as a fish that had been "suspiciously missing all spring and summer," which is itself the more notable data point than any specific timing comparison.