Mahi-mahi fishing from Islamorada runs from the reef line out to the Gulf Stream, which lies about 10 to 20 miles offshore. The documented detail for mahi at this port is thin: no season window, mahi ground or method is confirmed for Islamorada itself. This page sets out what can be said and what cannot. The Islamorada port page has the marina and inlet details. For the wider coast, see the mahi-mahi fishing in the Atlantic Southeast and the Atlantic Southeast offshore fishing guide.
When mahi are around Islamorada
No mahi season is confirmed for Islamorada. Across the Keys and South Florida, mahi are the first arrivals of the year and their window is the longest in the region, because the Gulf Stream runs closest to the beach here. Those are regional facts. Confirm the local window with a captain before you book.
Where boats run
Boats cross Hawk Channel to the reef line a few miles out and run on to the Gulf Stream. The Florida Reefs average about 5 miles from the line of keys, and their outer edge shoals abruptly without breakers to mark it in smooth weather. In clear weather the lights and daybeacons make the reef line easy to follow, and in thick weather the soundings are the better guide. Tidal currents run strong through the openings between the keys, and at times a strong current sets through Channel Five. When wind blows against that set, the water there can stand up steeper. Easterly trades are persistent, and southerly or strong northeasterly winds can send more sea into the gaps off Islamorada. Check conditions yourself before you run a cut.
Grounds and structure
No named mahi ground is confirmed for Islamorada. The named structure close by includes Alligator Reef, which begins about 3.5 miles out of Robbie’s Marina, and the shallow Alligator Lighthouse and Cheeca Rocks reef, with listed depths from about 6 to 100 feet. The San Pedro Underwater Archaeological Preserve, a Spanish galleon site, lies within a mile of Robbie’s Marina. The Islamorada Hump is a deep-water spot whose distance and depth are not confirmed. None of these is tied to mahi here, so the Gulf Stream and the weed lines beyond the reef are the mahi water.
How mahi are fished out of Islamorada
No local method for mahi is confirmed. The general approach applies: troll rigged ballyhoo and skirted lures along the edge of the weed and floating debris, run and gun between patches when the weed is scattered, and keep one hooked fish in the water to hold the school.
Who fishes it
Bud n’ Mary’s Islamorada Fishing Marina lists mahi-mahi among its targets, and its website is budnmarys.com. That line is written for the Keys as a whole, so confirm the season and grounds with the captain. No Islamorada mahi tournament is confirmed on this page.
Frequently asked questions
How far offshore is the Gulf stream from Islamorada?
About 10 to 20 miles. Most mahi trips are a long run from the reef line, so plan fuel and time for it.
When is mahi season here?
No local window is confirmed. Regionally, the Keys see mahi earliest and for the longest stretch, so confirm the current window with a captain.
Is the reef line hard to find?
On flat days the reef edge is hard to read by eye. Run the chart plotter against the charted lights and daybeacons, and use the soundings in thick weather.
Are there tournaments for mahi?
None is confirmed for mahi at Islamorada on this page.
