Flounder around Pine Island, Bokeelia and St. James City lie flat on sand and mud bottom near grass edges and channel drop-offs, ambushing bait rather than chasing it. FWC sets a 14 inch minimum size, a 5 fish daily bag, and a fall closed season running October 15 through November 30, so the window to keep one narrows right as the fall bite typically picks up.
FWC’s regulations for flounder, which cover Gulf flounder, Southern flounder, summer flounder and fringed flounder together, list a minimum size of 14 inches total length and a daily bag limit of 5 per person. The season is closed annually from October 15 through November 30 in both state and federal waters off Florida. These figures apply statewide, with separate rules inside Biscayne National Park that don’t reach Pine Island Sound.
That closed window matters here specifically because fall is when a lot of anglers around Pine Island start noticing more flounder showing up on sand potholes and channel edges as water cools. Whatever you catch during those six weeks, you’re catching to let go.
Bokeelia sits on the north end of Pine Island, facing Charlotte Harbor and Pine Island Sound, and flounder there hold on sandy patches next to grass flats and along the edges of the deeper channels running out toward the Sound. A flatfish buried in sand is nearly invisible, so working structure edges methodically produces more than blind casting open flats.
St. James City, on the south end, faces San Carlos Bay and the passes leading out to the Gulf, and the same pattern holds: sand next to grass, drop-offs where a flat meets a channel, and the mouths of canals where current sweeps bait past a flounder lying in ambush.
Docks and bridge pilings around Matlacha, between the mainland and Pine Island, hold flounder too, particularly where current scours a sand pocket next to the structure.
Flounder feed on the bottom and ambush prey rather than pursue it, so a moving tide that pushes bait across sand and grass edges is more productive than slack water. Many anglers here find the bite strongest as water starts cooling into fall, right up against the October 15 closure, and again once the season reopens December 1 through the coldest months.
A jig head tipped with a mud minnow, finger mullet or shrimp, worked slowly right along the bottom, is the standard approach. Flounder hit and often sit on the bait for a moment before committing, so resist setting the hook on the first tap and instead let the fish load up before you drive it home.
A Carolina rig with a live or cut baitfish on the bottom works the same water without needing constant retrieval, which is useful when you’re covering a wide sand flat and want the bait sitting still for a passing fish to find.
A 7 foot medium-light spinning rod, 10 to 15 pound braid, and a short fluorocarbon leader covers flounder fishing here without any need to go heavier. These aren’t fish that make long runs, so the tackle demand is closer to what you’d bring for trout or small snapper than what you’d bring for snook.
Retrieving too fast is the most common one. A flounder is an ambush predator lying flat on the bottom, and a bait moving quickly across the top of it often gets ignored entirely. Slow the retrieve down until the bait is nearly crawling.
The other mistake is not accounting for the closed season before planning a trip specifically to keep fish. Checking the calendar before you go saves a wasted trip if harvest is what you’re after, even though catch and release stays legal through the closure.
Every angler needs a Florida saltwater fishing license to target flounder here, closed season or not, since catch and release still requires one. See our Southwest Florida fishing license guide for what residents and visitors need, and the regulations page for the current figures across every species on this site. Our shore and pier fishing guide covers public access points around Pine Island Sound, and the season and regulation calendar keeps this closure alongside every other SWFL season in one place.