Florida · Keys
BLUE MARLIN FISHING
IN MARATHON
Marathon is a solid destination for blue marlin fishing, with good fishing in July, August. Book a charter and target blue marlin with local experts.
About Blue Marlin Fishing in Marathon
The ultimate big game fish. Spectacular fighters that can exceed 1,000 pounds.
Blue Marlin are the ultimate big game fish — the apex predator of the open ocean. These magnificent billfish can exceed 1,000 lbs and are found in warm, blue water worldwide. Their cobalt-blue back, silver-white belly, and prominent bill (upper jaw extension used for slashing through bait schools) make them unmistakable. When hooked, blue marlin are spectacularly acrobatic — greyhounding across the surface and launching themselves fully airborne, sometimes multiple times. Catching a blue marlin on rod and reel is considered one of fishing's ultimate achievements.
Scientific name: Makaira nigricans
Blue Marlin Seasonal Calendar — Marathon
Month-by-month availability for blue marlin in Marathon, FL.
How to Catch Blue Marlin in Marathon
Techniques & Bait
Trolling large skirted lures (Moldcraft, Black Bart, Marlin Magic) in a spread behind the boat at 8-10 knots is the standard technique. Live bait trolling with large skipjack tuna, bonito, or blue runners under a bridge-mounted bait and switch setup targets the largest fish. Dredges (underwater teasers with hookless bait) are used to attract marlin to the spread. Pitch baiting — pulling a teaser close to the boat to draw in a marlin, then pitching a live bait — is the most exciting technique for experienced crews.
Recommended Tackle
80-130 lb class conventional trolling gear, roller guides, 80-130 lb monofilament, heavy cable leaders, size 10/0-12/0 hooks. Stand-up gear for experienced anglers. Fighting chair for fish over 500 lbs.
Best Deep Sea Fishing Fishing Spots in Marathon
Top spots where local captains target blue marlin and other deep sea fishing species.
Marathon Hump (Middle Hump)
The Marathon Hump is a prominent deepwater seamount south of Marathon where the ocean floor rises dramatically from 1,100 feet to around 480 feet. This structure concentrates blackfin tuna, yellowfin tuna, wahoo, and mahi-mahi, and is one of the most productive deep-dropping spots for swordfish in the Middle Keys. The Hump is a bucket-list destination for serious offshore anglers.
Gulf Stream (Marathon)
The Gulf Stream flows approximately 10-15 miles south of Marathon's reef line, bringing warm bluewater current and pelagic species within range. Sailfish, mahi-mahi, wahoo, and blackfin tuna patrol the Stream edges, especially along weed lines and color changes. Marathon's central Keys location provides access to productive Gulf Stream fishing grounds.
West Hump (from Marathon)
The West Hump is another deepwater seamount accessible from Marathon, lying roughly 20 miles southwest. The bottom rises from deep water to create a fish-concentrating feature that holds swordfish, tuna, wahoo, and mahi-mahi. Marathon boats can fish both the Marathon Hump and West Hump on a single offshore trip when conditions allow.
Marathon Deep Wrecks
Several deep wrecks lie in 200-plus feet of water south of Marathon along the outer edge of the reef system. These sunken vessels hold large amberjack, almaco jack, barracuda, and grouper on the structure, while pelagics cruise overhead in the current. Deep wreck fishing is a productive alternative to humps when targeting bottom species offshore.
Other Species in Marathon
More fish you can target while visiting Marathon.
Blue Marlin Fishing in Marathon — FAQ
Blue Marlin fishing in Marathon is productive during July, August.
Blue Marlin fishing charters in Marathon are typically deep sea fishing trips. Prices vary by trip duration and group size. Most charters include all gear, bait, licenses, and fish cleaning.
Trolling large skirted lures (Moldcraft, Black Bart, Marlin Magic) in a spread behind the boat at 8-10 knots is the standard technique. Live bait trolling with large skipjack tuna, bonito, or blue runners under a bridge-mounted bait and switch setup targets the largest fish. Dredges (underwater teasers with hookless bait) are used to attract marlin to the spread. Pitch baiting — pulling a teaser close to the boat to draw in a marlin, then pitching a live bait — is the most exciting technique for experienced crews.
No — when you book a charter in Marathon, your captain provides all required Florida fishing licenses as part of the trip.
Blue Marlin regulations in Florida include minimum size limits and bag limits that vary by season. Your captain will know the current regulations and ensure compliance.
While targeting Blue Marlin in Marathon, you may also catch Blackfin Tuna, Mahi Mahi, Sailfish, Tarpon, Mangrove Snapper. Many charter trips target multiple species for the best action.
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