Florida · Keys
BLUE MARLIN FISHING
IN KEY WEST
Key West 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 Key West
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 — Key West
Month-by-month availability for blue marlin in Key West, FL.
How to Catch Blue Marlin in Key West
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 Key West
Top spots where local captains target blue marlin and other deep sea fishing species.
The Hump (West Hump)
The Hump is a legendary deepwater seamount about 14 miles west of Key West where the bottom rises from 1,100 feet to around 480 feet. This underwater mountain concentrates blackfin tuna, yellowfin tuna, wahoo, and mahi-mahi in massive numbers. It is also one of the top swordfish deep-dropping spots in the entire Florida Keys.
The Wall (Gulf Stream Edge)
The edge of the continental shelf runs just 10-15 miles south of Key West where blue Gulf Stream water meets the reef line. Sailfish, blue marlin, wahoo, and mahi-mahi patrol this edge, making Key West one of the closest ports to bluewater fishing in the entire United States. Winter sailfishing along The Wall is a Key West tradition.
Marquesas Keys
The Marquesas Keys are an uninhabited atoll roughly 24 miles west of Key West surrounded by pristine flats and deeper offshore waters. The surrounding depths hold permit, tarpon, and barracuda on the flats, while deeper edges produce mutton snapper, grouper, and pelagics. The remote location means less fishing pressure and bigger fish.
Riley's Hump
Riley's Hump is a deepwater reef formation in the Tortugas Ecological Reserve roughly 30 miles west of the Dry Tortugas. It is a critical spawning aggregation site for mutton snapper and attracts large pelagics including yellowfin tuna and wahoo along its deep edges. The area's protected status ensures a healthy ecosystem that benefits surrounding fisheries.
Other Species in Key West
More fish you can target while visiting Key West.
Blue Marlin Fishing in Key West — FAQ
Blue Marlin fishing in Key West is productive during July, August.
Blue Marlin fishing charters in Key West 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 Key West, 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 Key West, you may also catch Blackfin Tuna, Mahi Mahi, Tarpon, Sailfish, Mangrove Snapper. Many charter trips target multiple species for the best action.
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