Stripers Show in Chesapeake Creeks as Flounder Season Winds Down

What's biting

What's next

Expect the pattern already showing at Port Mahon and along the Chesapeake-area tidal creeks to build through the Labor Day weekend and into September. Smith's Bait Shop, reporting for The Fisherman — DE/MD/Chesapeake, says striped bass fishing 'will only improve in September' as water starts to cool — a trend worth planning around if you're working sandworms or shrimp on the drop along tidal rivers and creek mouths on the outgoing tide.

Flounder anglers have a hard deadline to watch: the New Jersey side of Delaware Bay closes its flounder season September 25, though Delaware's own four-fish limit at 17.5 inches continues through the end of the year per this week's report. For Chesapeake-side anglers who typically follow Maryland's own flounder regulations, that closing-date detail is a reminder to check current state rules before harvesting, since regional deadlines vary bay-to-bay and can shift year to year.

The Old Grounds continues producing flounder, sea bass, and croaker, and Hook 'em and Cook 'em notes September 'can be a very good time to fish there as all three species seem to improve in size and quantity' — worth watching if the current undersized croaker run (per Eric Burnley, with keepers over the 9-inch minimum hard to come by) is a signal that better-sized fish are still working their way in from open water.

Offshore, canyon trips are still turning up tuna and tilefish, a bite that typically holds through early fall before boats start shifting priorities toward the inshore migration. If the Fenwick Shoal action holds — small bluefish and Spanish mackerel on trolled Drone or Clark spoons, per this week's Hook 'em and Cook 'em report — that's a sign baitfish are still moving through the lower bay approaches, which is usually a precursor to a stronger striper push as those bait schools get pressed toward the creeks and rivers.

Plan around the standard late-August-into-September window: cooler mornings, the tail end of summer species like croaker and spot, and the first real signs of the fall transition building underneath the surface. Anglers working the tidal creek mouths on moving water, particularly the last two hours of an outgoing tide, are in the best position to catch the striper bite as it strengthens over the next several weeks.

Context

Late August into September is the classic transition window on Chesapeake Bay and the broader Delaware-Maryland coast: summer species like croaker, spot, and flounder are still around but starting to thin out or run smaller, while striped bass activity typically builds as water temperatures ease down from summer highs. The pattern described in this week's The Fisherman — DE/MD/Chesapeake report — 20- to 24-inch stripers already showing in tidal creeks and rivers, flounder holding at spots like the Old Grounds and Port Mahon, and croaker running plentiful but undersized — is broadly consistent with a typical late-summer bay pattern rather than an early or late season.

The regulatory detail worth flagging for context: New Jersey's side of Delaware Bay closes flounder season September 25, while Delaware's four-fish, 17.5-inch limit continues through year-end — a reminder that flounder rules vary meaningfully across adjoining jurisdictions in this region, and Maryland/Chesapeake anglers should check their own state's current flounder regulations rather than assume any neighboring state's dates apply.

We don't have a direct year-over-year comparison in this week's feeds — none of the available reports characterize this season as notably ahead of or behind a typical year — so it's honest to call this an on-schedule late-summer pattern based on the available intel rather than claim a specific anomaly. Hook 'em and Cook 'em's note that September traditionally brings improved size and quantity for the Old Grounds' flounder, sea bass, and croaker mix lines up with the general seasonal expectation for the region.