Fall Flounder Run in Ocean Springs: Timing the Migration
Understanding the Fall Flounder Migration
Every autumn, southern flounder abandon the bays, bayous, and marshes of the Mississippi coast and migrate toward deeper Gulf waters to spawn. This predictable movement—triggered by shortening days and declining water temperatures—creates a window of concentrated fishing from mid-October through late November. Ocean Springs sits directly in the migration path as flounder funnel from the eastern arms of Biloxi Bay through the passes toward the open Gulf.
Migration Triggers and Timing
Flounder begin staging in the bayou mouths and channel edges when water temperatures drop below 70°F, usually in mid-October. The first strong cold front of fall—one that drops water temps 5+ degrees over a few days—triggers the main push. Fish move from shallow marsh habitat into the deeper channels of Fort Bayou, Davis Bayou, and the main Biloxi Bay channel, then south toward the barrier islands.
Where Flounder Stage in Ocean Springs
| Stage | Location | Timing | Best Technique |
|---|---|---|---|
| Pre-migration (staging) | Fort Bayou mouth, marsh creek mouths | Early–mid October | Live bull minnow on Carolina rig |
| Active migration | Biloxi Bay main channel, bridge pilings | Late October – early November | Jig head with finger mullet, slow drag |
| Late migration | Bay passes toward barrier islands | Mid–late November | Gigging (wading) or heavy jig near pass |
The two weeks after the first real cold front in October are the magic window. Flounder that were scattered across miles of marsh suddenly concentrate in the bayou mouths and channel drops. You can catch more flounder in those 14 days than the rest of the year combined.
Techniques for Fall Flounder
Flounder fishing in Ocean Springs during the fall run requires a slow, methodical approach. These fish lie flat on the bottom and ambush prey that passes overhead, so your bait or lure needs to move slowly within a foot of the bottom:
- Live bull minnow on a Carolina rig: 1/4–3/8 oz egg sinker, 18-inch fluorocarbon leader, 1/0 wide-gap hook threaded through the minnow's lips. Cast to channel edges and crawl it back
- Berkley Gulp! on a jig head: The 3-inch Gulp swimming mullet in white or chartreuse on a 1/4 oz jig head is deadly when hopped slowly across sand and mud bottom
- Finger mullet on a fish-finder rig: Hook a live finger mullet through the back and slow-drift along channel edges
Tackle Setup
A 7-foot medium-action spinning rod with a fast tip gives you the sensitivity to feel a flounder pick up the bait. These fish don't strike hard—you'll feel a slight pressure or heaviness rather than a sharp tap. Spool a 2500-size reel with 10 lb braid and tie on a 15 lb fluorocarbon leader. When you feel the bite, lower your rod tip, reel the slack tight, and set the hook with a firm sweep. Flounder need a moment to get the bait fully in their mouth, so patience on the hookset is critical.
Gigging During the Run
Flounder gigging is legal in Mississippi and highly effective during the fall migration. Wade the shallow flats along the Fort Bayou shoreline and the bay-side beach areas at night with a bright light, looking for flounder lying on the bottom in 1–3 feet of water. Gigging catches fish that won't bite a hook because they're focused on migration rather than feeding.
Regulations
Mississippi manages flounder with specific size limits, bag limits, and seasonal closures designed to protect spawning fish. The regulations have tightened in recent years to support stock recovery. Check current rules at MDWFP before your trip—the fall closure dates shift annually. Redfish and Speckled Trout around Ocean Springs remain available throughout the fall as backup targets if the flounder season is closed during your visit.