A man on a boat holding a large mahi mahi fish, with the ocean and blue sky in the background. Text overlay reads "Hennessy Sportfishing, Marathon Florida Keys, www.hennessysportfishing.com."
A man on a boat holding a large mahi mahi fish, with the ocean and blue sky in the background. Text overlay reads "Hennessy Sportfishing, Marathon Florida Keys, www.hennessysportfishing.com."
Two men fishing on a boat in the ocean, one of them is holding a fishing rod with a large mahi mahi or dolphin fish caught on it and water splashing around.
Two men fishing on a boat in the ocean, one of them is holding a fishing rod with a large mahi mahi or dolphin fish caught on it and water splashing around.
A man wearing a beige hat, blue sunglasses, a neon yellow hoodie, and gray gloves is smiling as he holds a large wahoo fish near the water on a boat at sunset.
Man fishing on a boat in the ocean, wearing a wide-brimmed hat, sunglasses, a blue shirt, and dark pants. A fishing rod is visible with a fish on the line, and the ocean water is deep blue with small waves.

Florida Keys 10-Hour Offshore Fishing Charter

Our 10-Hour Offshore Fishing Charter in the Florida Keys is the ultimate full-day deep sea fishing experience for serious anglers who want maximum time, maximum range, and the best possible shot at big game fish. Departing from Marathon, Florida, this private offshore charter takes you far into the Atlantic in search of the most exciting pelagic species the Florida Keys have to offer.

With a full 10 hours on the water, we have the flexibility to run long distances offshore, work multiple productive zones, and stay on the bite as conditions change throughout the day. This is the premier choice for anglers who want to fully commit to offshore fishing and experience everything the bluewater has to offer.

We commonly target Mahi Mahi, Blackfin Tuna, Wahoo, Sailfish, Kingfish, and Barracuda, along with other seasonal offshore species. Depending on conditions, we may troll offshore weed lines, fish live bait, work deep drop areas, or adjust strategies throughout the day to stay on active fish and maximize your chances at trophy catches.

This trip is designed for anglers who want the highest opportunity for success and variety, with enough time to adapt, move, and fish aggressively in productive offshore waters. Whether your goal is filling the cooler, targeting trophy fish, or simply experiencing the best offshore fishing in the Florida Keys, this charter delivers an unforgettable day on the water.

This trip is limited to five guest on the Boca and Mako. Please book the Venture or Hatteras for parties 6

Aerial view of a Boca fishing boat on green water with three men on deck, two fishing rods, and a net hanging off the side.

Boca 

26 ft, Limited to 5 Guest

$1,800

A white fishing boat on calm blue water under a partly cloudy sky with fishing rods on the boat's roof.

Mako

28 ft, Limited to 6 Guest

$1,950

A 34 Venture center console motorboat with two fishing rods mounted on the T-top, cruising through turquoise water with a person seated at the helm.

Venture

34 ft, Limited to 6 Guest, Bathroom

$2,350 *An additional fuel surcharge applies on the Venture 34 for offshore trips

A 40 foot Hatteras with two levels sailing on the ocean with four people on board, three on the upper level and one on the lower level, under a partly cloudy sky.

Hattaras

38 ft, Limited to 6 Guest, Bathroom and Cabin with AC

$2,400

Not sure what trip to select? Give us a call 305-414-1867
Not sure what trip to select? Shoot us a text 305-414-1867
Two men standing on a dock holding large fish they caught, with a boat, houses, and blue sky in the background.
A man sitting on a boat holding a large wahoo fish, with a fishing rod next to him. The man is smiling and wearing sunglasses, a blue patterned shirt, and shorts. The scene is on the open ocean with a clear sky.
A man on a boat holding up fishing catches, including multiple orange fish, against a backdrop of the open ocean and a bright blue sky.
Two men fishing from a boat on the ocean under a clear blue sky. One is reeling in a large fish
Man wearing sunglasses holding a large tuna fish on a boat in the ocean, with fishing rod and blue sky in the background.
Man wearing sunglasses holding a large tuna fish on a boat in the ocean, with fishing rod and blue sky in the background.
Two men fishing on a boat with a large tuna fish caught, seen in mid-air over the ocean under a blue sky with some clouds.
Two men fishing on a boat with a large tuna fish caught, seen in mid-air over the ocean under a blue sky with some clouds.
A man on a boat holding a large fish, wearing sunglasses, a hat, pink shorts with fish patterns, and green boots, with fishing gear in the background and open water and cloudy sky behind him.
A man on a boat holding a large fish, wearing sunglasses, a hat, pink shorts with fish patterns, and green boots, with fishing gear in the background and open water and cloudy sky behind him.

Why Choose a 10-Hour Offshore Fishing Charter?

This is the top-tier offshore experience—built for anglers who want the most time, range, and opportunity possible.

Guests choose this trip when they want:

  • Maximum offshore range and fishing time

  • The best chance at mahi mahi, tuna, wahoo, and sailfish

  • A true full-day deep sea fishing adventure in the Florida Keys

  • Flexibility to fish multiple offshore zones and techniques

Captain Kerry’s Take:
The 10-hour offshore trip gives us complete freedom to fish the day properly. We can run far offshore, adjust to conditions, and stay on productive water without watching the clock. This is the trip where we chase quality fish and put in a full day working the best water available.

What Guests Say:
Guests often describe this as the “ultimate Florida Keys fishing trip.” They love the long offshore runs, the anticipation of big fish, and the variety that comes with a full day on the water.

Many anglers say this is where they’ve had their biggest catches or most memorable fishing moments. The extended time allows us to stay flexible, find active fish, and fully capitalize on changing offshore conditions throughout the day.