Delaware Bay flounder bite runs hot into the Full Moon

What's biting

What's next

With no fresh buoy or gauge telemetry to lean on for this stretch of Delaware Bay, the read for the next 2-3 days comes mostly from what shops and captains are seeing on the water rather than instrument data — treat timing windows as directional rather than exact.

Flounder should stay the headline fish through the Full Moon period. Higbee's Bait and Tackle is already calling the bite "hot," and with the moon pushing bigger tide swings, drifting structure like the EP Tower and the areas near the lighthouse on the moving water looks like the highest-percentage play this weekend. Big Dave's Tackle echoes the pattern bay-wide, with flounder, croaker, and spot spread from the beaches out to the shipping channel — worth covering water rather than anchoring on one spot if the bite is slow to start.

Striped bass activity in the tidal creeks and rivers, per Smith's Bait Shop, should hold up on sandworms and shrimp as water temperatures ease off their late-summer highs; that pattern typically firms up further as nights cool into early September. Croaker fishing has been a mixed bag — strong at spots like Bowers Beach and Woodland Beach per Smith's, but Eric Burnley flags that keeper-size (9-inch) fish have been scarce elsewhere on the bay, suggesting a size mismatch rather than a lack of numbers.

Looking toward the changeover into fall, Eric Burnley expects things to keep trending the same direction into September, and it's worth planning around the regulatory calendar: the New Jersey side of Delaware Bay closes flounder season September 25, while the Delaware side's four-fish, 17.5-inch limit runs through the end of the year — so anglers working both shores should double check which regs apply to their launch point. Tog and sheepshead around bridge and jetty structure, per Big Dave's Tackle, should keep improving as water cools, a pattern that typically strengthens through September in this region. Always confirm current DNREC regulations before harvesting, since slot limits and seasons are subject to in-season revision.

Context

Late August into the Full Moon is a typical transition window for Delaware Bay — summer species like flounder, croaker, and spot are still active, striped bass start showing more consistently in the tidal creeks and rivers, and tog/sheepshead action around structure begins building toward its fall peak. What's coming out of the shop reports this week reads as on-schedule for the calendar: Eric Burnley's note that catches should only improve heading into September is a normal seasonal expectation for this fishery, not an early or late signal.

One regulatory wrinkle worth flagging for context: Delaware Surf Fishing notes that DNREC revised the recreational striped bass summer slot size limit to a 20-24 inch slot in line with ASMFC compliance requirements — a reminder that Delaware Bay striper regs have been actively adjusted in recent seasons, so anglers should verify current slot limits before keeping fish rather than assuming last year's rules still apply. Delaware Surf Fishing also notes ongoing closures at the Cape Henlopen Fishing Pier, with roughly 200 feet of the pier's end now off-limits — a access consideration for surf and pier anglers working that stretch of coast.

No buoy or gauge history is available in this feed to compare current water temperature or flow against prior years, so a direct numeric comparison isn't possible from this data — the seasonal read above is based on angler-intel testimony only.