Season for sailfish fishing out of Marathon
Boats out of Marathon cross the reef line, run 30-45 minutes into Gulf Stream water, and fish the surface in 30-65 ft. Marathon sits in the Middle Keys, and winter is the prime window.
For how sailfish feed and move, see our sailfish fishing guide. For the coast beyond this port, our Atlantic southeast sailfish guide (see also the Atlantic Southeast offshore fishing guide) covers the wider picture.
This page covers timing, the run, the depth band, named structure, local boats, and where the rules live. It helps you decide where to look and makes no promise about fish.
Winter is prime
Winter is the prime window for sailfish in the Keys. Always Late’s season notes call the winter months "absolutely prime," and Memory Maker Sportfishing describes them the same way.
| Source | What it says |
|---|---|
| Always Late Fishing Charters | Winter months are absolutely prime in the Keys |
| Memory Maker Sportfishing | Winter months are prime time in the Keys |
Tournament timing
The Marathon Premier Sailfish Tournament is usually held in April. The "Who fishes" section below covers the local boats and the event.
The run: how far and where boats go
By offshore standards the run is short. Boats cross the reef line, continue into Gulf Stream water, and fish near the surface across a defined depth band.
Past the reef line
Always Late puts Gulf Stream water past the reef line at 30-45 minutes from the dock. That is an operator’s estimate, and your own time depends on your boat and where you launch.
Depths where fish show
Memory Maker reports fish near the surface in 30-65 ft of water. Working outward from about 30 ft and watching the sounder gives you a depth band to hold.
| Detail | Number | Source |
|---|---|---|
| Run to Gulf Stream water | 30-45 minutes | Always Late |
| Near-surface band | 30-65 ft | Memory Maker |
How it’s fished locally
Local operators run SeaVee center consoles to Gulf Stream water past the reef line, where fish show near the surface in the 30-65 ft band. In practice that means a center console, a short run, and surface fishing.
Grounds and structure near Marathon
These are the named structures on the run and around the port, listed from shallow to deep. Treat them as reference points on the chart rather than sailfish spots.
| Name | Depth | Notes |
|---|---|---|
| Long Key Reefs | 24 and 26 ft | Bridge spans and concrete |
| Seven Mile Bridge Reef | 90 ft | Bridge spans and concrete |
| Marathon Reef Site | 100 ft | Bridge rubble |
| Thunderbolt | 120 ft | 4 miles south of Marathon and Key Colony Beach |
| Marathon Hump (Marathon West Hump) | 480 ft at its shallowest | Offshore hump |
| 409 Hump (also listed as 408 Hump) | – | Named as a top Middle Keys blackfin spot |
Load these names against the Chart Contours layer to see where each one sits on the run. Chart layers are not for navigation.
Long Key Reefs
Bridge spans and concrete at 24 and 26 ft. This is the shallow end of the cross-section.
Seven Mile Bridge Reef
Bridge spans and concrete at 90 ft.
Marathon Reef Site
Bridge rubble at 100 ft.
Thunderbolt
The Thunderbolt wreck off Marathon sits in 120 ft, 4 miles south of Marathon and Key Colony Beach.
Marathon Hump (Marathon West Hump)
Its shallowest point is 480 ft. Both names refer to the same structure.
409 Hump (408 Hump)
The name appears as both 409 and 408. It is named as a top Middle Keys blackfin tuna spot.
Who fishes for sailfish out of Marathon
Two local charters list sailfish, and both run SeaVee center consoles. To compare more options, see our billfish fishing guides list.
Always Late Fishing Charters
Capt. Lucas Ponzoa runs Always Late, a 32-ft SeaVee center console that carries 6 passengers. The charter lists sailfish.
Memory Maker Sportfishing
Capt. Jon Henry runs a 29-ft SeaVee center console, a restored 2000 model. The charter lists sailfish and is the source of the 30-65 ft near-surface band.
Marathon Premier Sailfish Tournament
The local sailfish tournament is usually held in April.
FAQ about sailfish fishing out of Marathon
When is the best time for sailfish off Marathon?
Winter. Always Late and Memory Maker both call winter prime time in the Keys.
How long is the run to the Gulf Stream from Marathon?
Always Late puts Gulf Stream water past the reef line at 30-45 minutes from the dock.
What depth should I look in for sailfish near Marathon?
Memory Maker reports fish near the surface in 30-65 ft of water.
Where is the Thunderbolt and how deep is it?
The Thunderbolt sits in 120 ft, 4 miles south of Marathon and Key Colony Beach.
When is the Marathon Premier Sailfish Tournament?
It is usually held in April.
