Flounder Dominates Delaware Bay as Summer Species Flood the Back Bays

What's biting

What's next

The flounder bite shows no signs of letting up as we head into the heart of summer. Back-bay action is running strong along the Wildwoods-area ICW, with Pier 47 Marina (The Fisherman — Southern NJ) reporting fish in as little as 6 feet of water taking live minnows and 6-inch Gulp Mullets on the drift. A few blues and rays are mixed in along those same stretches — par for the course this time of year. For quality fish, the offshore reef pattern is also paying off: Fin-Atics (The Fisherman — Southern NJ) notes an 8-pound flatty recently came back from the Ocean City Reef Site, with the crew favoring 6-inch Gulps tipped with mackerel or bluefish strips to sort doormat-class fish from the shorts.

With back-bay water temps now stabilized, the croaker and spot bite should continue to strengthen through the month. Eric Burnley (The Fisherman — DE/MD/Chesapeake) is calling for the summer pattern — consistent fishing from the inland bays on out to the inshore lumps — to hold into July, with croaker and spot responding well to bloodworms and Fishbites off bay jetties. Sheepshead should remain active around hard structure on sand fleas and green crab, check regulations for local size and possession limits before targeting them.

Weekend timing will matter. The waning gibbous moon produces moderate tidal flow — plan the most active drifts around the last two hours of the incoming tide and the first of the outgoing, when bait is pinned against bay channel edges and structure. Early morning and evening windows will be the most comfortable given the summer heat, and flounder and weakfish historically feed most aggressively during those lower-light periods.

Weakfish (locally called trout) are an under-the-radar opportunity right now. Smith's Bait Shop (The Fisherman — DE/MD/Chesapeake) notes trout taking clams and yellow bucktails tipped with Fishbites or yellow soft plastics at bay jetties. Grumpys Tackle (NJ) also reports a couple of weakfish trickling into South Jersey bay-side catches this week. Numbers aren't strong yet, but dawn and dusk tidal movements near current seams and jetty structure are worth a dedicated effort.

Context

Early July is historically one of the most species-diverse and productive windows in Delaware Bay. The volatile spring-to-summer transition — marked this year by inconsistent weather, temperature swings, and frequent blow-out days — has given way to the stabilized summer pattern that defines the bay fishery from the Fourth of July through August.

This year's progression appears largely on schedule, though the transition was slower than anglers hoped. Multiple northern New Jersey sources (The Fisherman — Northern NJ) described June as an 'up and down' fishing month, and Miss Barnegat Light (The Fisherman — Central NJ) noted that periodic upwelling events and southerly winds briefly interrupted the fluke bite before conditions settled. For the Delaware Bay corridor specifically, Eric Burnley (The Fisherman — DE/MD/Chesapeake) reports that June delivered more croaker, spot, sheepshead, and flounder than the entire prior season — a signal that the summer class arrived on roughly normal timing even if the run-up was turbulent.

For flounder, July is typically when back-bay fishing reaches its seasonal peak in Delaware Bay, as water temps lock in and fish commit to aggressive feeding along bait-rich edges. The offshore reef bite for larger doormat-class fish generally intensifies through midsummer as fish migrate to deeper, cooler structure — a pattern that Fin-Atics and Waterfront Marine (both via The Fisherman — Southern NJ) suggest is already underway.

Weakfish are historically a Delaware Bay staple through summer, though the species has posted inconsistent appearances in recent years due to broader stock pressures. Current reports suggest a modest early-July presence at bay jetties, consistent with their typical arrival window — but no strong run has materialized yet. Croaker, spot, kingfish, and sheepshead are right on schedule and typically peak in Delaware Bay through July and August, making this the right time to target that mixed bottom-species bite on the bay side.