Updated: Thursday, September 3, 2026 · Next update: Thursday, September 10, 2026
This Indian River Lagoon fishing report covers early September, when the lagoon comes out of its summer doldrums. Redfish schools on the flats around the spoil islands are the lead target, the mullet run pushes through Sebastian and Fort Pierce inlets, and the first slightly cooler mornings have trout feeding harder at dawn. This is my home water, and the first week of September is when I start fishing it seriously again. Plan around wind and light on the flats and the outgoing tide at the inlets.
What’s Hitting
Redfish schools of 20 to 60 fish work the flats around the spoil islands and the Fort Pierce and Vero grass beds on the higher water. Trout sit on the deeper grass and the edges of the channels at first light, with some big fish among them.
Snook and tarpon feed on the mullet at Sebastian Inlet, Fort Pierce Inlet and along the spoil islands on the inside. Black drum and sheepshead hang on the bridge pilings, and jacks chase bait up and down the whole lagoon.
Where to Find Them
The spoil islands from Sebastian down through Fort Pierce and the flats around Round Island and the Vero power plant hold redfish. Look for trout on the deeper grass off Vero Beach and in the Fort Pierce area.
Sebastian Inlet on the outgoing is the snook-and-tarpon show, and the Fort Pierce Inlet jetties offer the same. The Wabasso, Vero and Fort Pierce causeways are the black drum and sheepshead spots; pilings grow barnacles and hold crabs, exactly what those two species are built to eat.
Tides & Conditions
Lagoon water temperatures sit in the upper 80s with fair clarity, and a few cooler mornings put the fish in a better mood. The lagoon tide is minimal away from the inlets, so wind and light matter more than tide on the flats. Fish the calm mornings and the leeward shorelines.
Outgoing tides at the inlets are prime for the mullet run. It is also tropical season, so watch the forecast.
Tackle & Tactics
Lagoon and inlet setups:
- Flats reds: a gold spoon, a weedless soft plastic or a small topwater early.
- Trout: a soft plastic on a light jig head, or a topwater at dawn.
- Inlet snook: a live mullet on a 5/0 circle hook and 40-pound fluorocarbon; upsize for tarpon.
- Bridges: a live shrimp on a jig head fished tight to the pilings for drum and sheepshead.
Local Intel This Week
The Sebastian Inlet State Park ramp puts you on the inlet and the north-end spoil islands. The Wabasso Causeway ramp and the MacWilliam Park ramp in Vero Beach cover the middle lagoon flats and causeways, and the Stan Blum ramp in Fort Pierce is the launch for Fort Pierce Inlet. Round Island Riverside Park and Donald MacDonald Park offer additional lagoon access, including a jumping-off point for the Round Island flats.
Expect fish to concentrate on the flats around the spoil islands and at the inlets on the mullet. Atlantic coast snook harvest carries a permit requirement, and redfish rules vary by management zone. Check current FWC and federal regulations and seasons before keeping fish.
This Week’s Tip
Lagoon redfish in September spook easily in the clear, warm water. Approach from downwind with the trolling motor off, and make long casts ahead of the school. If the school flushes, wait it out; they usually settle back down within 15 minutes.
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