Delaware Bay flounder heats up before NJ's Sept. 25 close

What's biting

What's next

With the flounder bite still building and NJ's Delaware Bay season set to close September 25, the next two-plus weeks are the window to fish it hard before it shuts down. Big Dave's Tackle and Higbee's Bait and Tackle both describe steady, improving action rather than a fading late-summer pattern, so anglers who get out on the Old Grounds, near the EP Tower, or around the lighthouse structure in the coming days should keep finding keeper-class fish to 23 inches.

Tog and sheepshead should keep building through early September as water begins its seasonal cool-down. Boulevard Bait & Tackle and Hands Too Bait and Tackle both note fish moving onto back-bay bridges, jetty rocks and inlet structure now, a pattern that typically strengthens through fall as tog stage up on hard bottom. Green crabs and sand fleas remain the go-to baits per both shops, and anglers targeting sheepshead in the 8-to-11-pound class should stick with the same structure-tight approach.

On the surf and bayshore side, Hands Too Bait and Tackle's NJ/DE Bay Surf report flagged the start of the mullet run along with kingfish and snapper blues showing on the oceanfront — that bait arrival is worth watching closely, since a strengthening mullet push typically pulls bigger predators like bluefish and weakfish tight to the beach and inlet mouths over the following one to two weeks. Backwater bridges are already holding more croaker and spot, and bayshore structure piles are giving up weakfish in the 18-to-24-inch class on floated bloodworms — a pattern likely to hold or improve as the mullet run develops.

This week's Full Moon means bigger tidal swings than normal; plan trips around the peak moving water rather than the slack, especially for tog and sheepshead over structure where current position matters. No live buoy or gauge data was available for this report, so check a local marine forecast and tide chart before heading out, particularly for any run out to the reef sites or shipping channel.

Heading toward Labor Day weekend, expect crowded boat traffic at popular Delaware Bay structure spots and reef sites — plan an early start if targeting the EP Tower or Old Grounds keeper flounder bite while it's still open.

Context

Late August into early September is prime time on the NJ side of Delaware Bay — flounder, tog and sheepshead all typically build through this stretch as water begins to cool, and this year's reports track that normal seasonal rhythm rather than running early or late. Higbee's Bait and Tackle and Big Dave's Tackle both describe the flounder bite as strong right now, consistent with the pre-closure push anglers usually see as the NJ Delaware Bay flounder season heads toward its typical fall closing date (Eric Burnley, The Fisherman — DE/MD/Chesapeake, notes September 25 this year).

The tog and sheepshead pattern described by Boulevard Bait & Tackle and Hands Too Bait and Tackle — fish moving onto back-bay bridges, jetty rocks and inlet structure — is the standard late-summer-into-fall staging pattern for this fishery, not a departure from it. Similarly, the start of the mullet run noted in the NJ/DE Bay Surf report lines up with the usual late-August timing for that bait migration along the Jersey shore and Delaware Bay beaches.

No buoy or gauge readings were available for this cycle, so we can't compare actual water temperature or flow against a numeric baseline — this note is built entirely from what shops and captains are reporting, not sensor data. Within that limitation, nothing in the current angler intel suggests an unusually early or late season; the reports read as a fairly typical late-August Delaware Bay pattern heading into the historically productive September run.