Flounder lead the summer charge as Delaware Bay back bays heat up

What's biting

What's next

The summer transition is now fully underway on the Delaware Bay, and flounder are positioned to carry the inshore load through at least the next several weeks. The outgoing tide window remains the key timing lever, per reports from Waterfront Marine and Fin-Atics, which both note fish concentrating in 10 to 14 feet of water as water drains out of the shallows. With the First Quarter moon in effect this week, tidal ranges tend to be moderate, which can produce cleaner water conditions in the back bays and slightly less current to fight on the drop.

Regulatory calendar note: The Fisherman (Northeast) confirms that sea bass bag limits drop from 10 fish to one fish on June 21, essentially replacing the spring limit with a bycatch allowance through late September. Any angler who has been mixing sea bass and fluke trips should prioritize structure fishing for sea bass before the weekend cutoff.

Summer species are filling in the bait picture across the bay. The Fisherman — NJ/DE Surf reports that hot and humid conditions have pushed surf temps into the 65 to 67 degree range, and that spot, croaker, and kingfish are beginning to appear in the suds. These smaller forage fish trickling into the bay system typically signal that summer flounder will find reliable live bait options nearby, supporting continued keeper flounder catches through July.

Black drum, which Riptide Bait and Tackle has been tracking at fish to 25 pounds, are worth a targeted session around bridge pilings and rocky structure on clam or peeler crab fished after dark. Sheepshead numbers have also increased along rocky structure, per The Fisherman — NJ/DE Surf, with green crabs and sand fleas the standard presentation. Night shark activity is picking up along beach zones as bay temps climb.

For the weekend, prioritize morning outgoing tides in the back bays for flounder on live killies or spearing rigs. Bridge anglers working soft plastics at night should still find the occasional striper in the mix per Riptide Bait and Tackle. Check local marine forecast before launching, as hot summer afternoons on the bay can develop afternoon thunderstorms with little warning.

Context

Late June on the Delaware Bay (NJ side) is one of the most reliable transition windows of the fishing year. The spring striper migration that commands attention from April through early June typically tapers sharply by mid-June as larger fish push north or move offshore, and the fishery pivots to summer flounder as the dominant inshore target. The current reports from Waterfront Marine, Riptide Bait and Tackle, Fin-Atics, and Ray Scott's Dock via The Fisherman — Southern NJ align squarely with that historical pattern, with the flounder bite firing on schedule and boaters reporting genuine keeper numbers.

The summer species arrivals noted by The Fisherman (Northeast) and The Fisherman — NJ/DE Surf, including spot, croaker, kingfish, and even a striped burrfish, are slightly ahead of what typical years produce by the third week of June, suggesting bay water temperatures may be running warmer than average for this point in the season. On years when summer species push in early, flounder fishing tends to strengthen quickly as baitfish concentrations build and fish follow the food.

Weakfish, historically the signature Delaware Bay species, remain scarce. Waterfront Marine noted a rare sighting to 16 inches this week, a modest but positive data point from a species that has been slow to recover from population declines over recent decades. Any incidental catch should be released carefully.

Black drum in the 25-pound class, per Riptide Bait and Tackle, align well with typical late May through June peak timing for this species on the NJ bay side before fish move back toward deeper structure as summer progresses. Overall, 2026 reads as a typical to slightly warm-running season with flounder and summer species arriving on or slightly ahead of historical schedule.