Saint-Martin · Saint-Martin Coast
YELLOWFIN TUNA FISHING
IN GRAND CASE
Grand Case is an outstanding destination for yellowfin tuna fishing, with peak season in January, February, March and good catches in July, August, September. Book a charter and target yellowfin tuna with local experts.
About Yellowfin Tuna Fishing in Grand Case
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 Case
Month-by-month availability for yellowfin tuna in Grand Case, MF.
How to Catch Yellowfin Tuna in Grand Case
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 Case
Top spots where local captains target yellowfin tuna and other deep sea fishing species.
Northeast Drop-Off
The shelf edge northeast of Grand Case drops into deep Atlantic water where blue marlin, wahoo, and mahi-mahi concentrate along the depth transition. The drop-off is accessible within a 30-minute run from Grand Case and produces bluewater action from April through November.
St. Barths Channel
The deep channel between Saint-Martin and St. Barths funnels Atlantic currents through a productive zone for wahoo, yellowfin tuna, and sailfish. Temperature breaks and current edges in the channel mark the most productive trolling lanes for offshore charters.
North Atlantic FADs
Fish Aggregating Devices deployed in deep Atlantic water north of Saint-Martin attract mahi-mahi, wahoo, and blackfin tuna to floating structure. The FADs provide reliable offshore action for Grand Case charter boats during the summer pelagic season.
Tintamarre Canyon
A submarine canyon northeast of Tintamarre Island creates upwelling that aggregates baitfish and attracts blue marlin, wahoo, and large yellowfin tuna. The canyon's proximity to Grand Case makes it a favored destination for experienced offshore charter captains.
Other Species in Grand Case
More fish you can target while visiting Grand Case.
Yellowfin Tuna Fishing in Grand Case — FAQ
The peak months for Yellowfin Tuna fishing in Grand Case are January, February, March, April, May, June. During these months, Yellowfin Tuna are most active and abundant in the Grand Case area.
Yellowfin Tuna fishing charters in Grand Case 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 Case, your captain provides all required Saint-Martin fishing licenses as part of the trip.
Yellowfin Tuna regulations in Saint-Martin 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 Case, you may also catch Mahi Mahi, Caribbean Red Snapper, Blue Marlin, Amberjack, Wahoo. Many charter trips target multiple species for the best action.
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