Louisiana · Southeast Louisiana
YELLOWFIN TUNA FISHING
IN GRAND ISLE
Grand Isle is a solid destination for yellowfin tuna fishing, with peak season in May and good catches in March, April, June. Book a charter and target yellowfin tuna with local experts.
About Yellowfin Tuna Fishing in Grand Isle
A powerful open-water predator prized for sashimi-grade flesh. Found in blue water near rips and structure.
Yellowfin Tuna are among the most powerful and prized offshore gamefish in the world. Their torpedo-shaped body is designed for sustained high-speed swimming, with a dark metallic blue back, silver-gold sides, and bright yellow finlets and fins that give them their name. Mature yellowfin develop extraordinarily long second dorsal and anal fins that sweep back like sickles. These warm-blooded fish (one of few fish that can maintain elevated body temperature) are found in deep blue water near oil rigs, floating debris, and temperature breaks. Their sashimi-grade flesh is among the finest seafood in the world.
Scientific name: Thunnus albacares
Yellowfin Tuna Seasonal Calendar — Grand Isle
Month-by-month availability for yellowfin tuna in Grand Isle, LA.
How to Catch Yellowfin Tuna in Grand Isle
Techniques & Bait
Chunking (cutting fresh baitfish into chunks and creating a chum slick) with yellowfin tuna hooks baited with fresh chunk bait is deadly when fish are located near structure or rigs. Live bait (hardtails, blue runners, goggle-eyes) drifted on the surface or at depth with a balloon or kite produces the largest fish. Trolling with cedar plugs, skirted ballyhoo, and spreader bars at 6-8 knots covers water when fish are scattered. Jigging with heavy butterfly jigs under the boat when fish are marked on the sounder is increasingly popular.
Recommended Tackle
Heavy conventional rod, 50-80 lb class reel, 65-100 lb braid, 80-130 lb fluorocarbon leader (at least 15 feet), 7/0-9/0 circle hooks. For chunking: medium-heavy spinning with 40-65 lb braid. Stand-up gear for fish over 100 lbs.
Best Deep Sea Fishing Fishing Spots in Grand Isle
Top spots where local captains target yellowfin tuna and other deep sea fishing species.
Grand Isle Offshore Platforms
The offshore oil and gas platforms south of Grand Isle in 100-300 feet of water create some of the most productive artificial reef habitat in the Gulf. Yellowfin tuna, wahoo, cobia, amberjack, and red snapper hold around the platform structures in impressive numbers. Jigging and live-baiting around the rigs produces consistent offshore catches on full-day trips.
Midnight Lump (from Grand Isle)
The Midnight Lump seamount is accessible on long-range trips from Grand Isle, approximately 70 miles offshore where the ocean floor rises dramatically. Yellowfin tuna, blue marlin, wahoo, and mahi-mahi concentrate over the lump in extraordinary numbers. It is one of the premier bluewater destinations in the entire Gulf of Mexico for trophy-class pelagic fishing.
Grand Isle Lumps
A series of natural bottom features and lumps south of Grand Isle in 150-400 feet of water create concentrated feeding zones for pelagic species. Yellowfin tuna, blackfin tuna, wahoo, and mahi-mahi patrol these underwater rises, especially when current lines and weed lines converge. The lumps are a cornerstone of Grand Isle's offshore charter fleet itinerary.
South Timbalier Block
The South Timbalier lease blocks southwest of Grand Isle feature a dense concentration of platforms and underwater infrastructure in 100-200 feet of water. Red snapper, amberjack, grouper, and cobia hold on the structure, while yellowfin tuna and wahoo cruise between platforms. The area provides both excellent bottom fishing and productive trolling routes for bluewater species.
Other Species in Grand Isle
More fish you can target while visiting Grand Isle.
Yellowfin Tuna Fishing in Grand Isle — FAQ
The peak months for Yellowfin Tuna fishing in Grand Isle are May. During these months, Yellowfin Tuna are most active and abundant in the Grand Isle area.
Yellowfin Tuna fishing charters in Grand Isle are typically deep sea fishing trips. Prices vary by trip duration and group size. Most charters include all gear, bait, licenses, and fish cleaning.
Chunking (cutting fresh baitfish into chunks and creating a chum slick) with yellowfin tuna hooks baited with fresh chunk bait is deadly when fish are located near structure or rigs. Live bait (hardtails, blue runners, goggle-eyes) drifted on the surface or at depth with a balloon or kite produces the largest fish. Trolling with cedar plugs, skirted ballyhoo, and spreader bars at 6-8 knots covers water when fish are scattered. Jigging with heavy butterfly jigs under the boat when fish are marked on the sounder is increasingly popular.
No — when you book a charter in Grand Isle, your captain provides all required Louisiana fishing licenses as part of the trip.
Yellowfin Tuna regulations in Louisiana include minimum size limits and bag limits that vary by season. Your captain will know the current regulations and ensure compliance.
While targeting Yellowfin Tuna in Grand Isle, you may also catch Redfish, Speckled Trout, Sheepshead, Black Drum, Vermilion Snapper. Many charter trips target multiple species for the best action.
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