floridakeys.noaa.gov · Official
Sanctuary and reef-protection context.
Dive Spot Guide•
Alligator Deep
Deeper outer Alligator reef profile with channel and blue-water edge.
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Visited by boat and planned more conservatively than nearby shallow Alligator routes, this site works best when visibility is good and the team is ready for deeper depth and stronger open-water feel.
About Alligator Deep
Alligator Deep is the deeper outer side of the Alligator Reef system, where a secondary reef line, sand channel, and deeper blue-water edge create a more advanced profile than the easier shallow sections nearby. The dive appeals to divers who want bigger reef relief, deeper water, and a better chance of passing predators without turning the site into a full wall dive.
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Research Estimate At Alligator Deep
Conservative baseline from public research. No community dives logged yet.
VisibilityVisibility: 18m
AccessChallenging entry effort
CoralMixed health
Aquatic LifeGreat variety
FacilitiesLimited facilities
Crowd / PopularityFew visitors
CurrentModerate current
SurgeLight surge
Where Is Alligator Deep?
This spotNearby spotsExplore nearby spots on the map
Community sourced coordinates.
Alligator Deep Planning Details
Depth range, seasonality, and planning context.
Reported Depth
12m - 30m
Depth Note
Depths can reach around 90 ft (30 m) on the farther edges.
Best Season
Usually best in clear Upper Keys weather windows when offshore boat access and visibility are strongest.
Typical Conditions
Expect a deeper, more open reef profile than the shallow Alligator sites, with blue water, sand channels, and more noticeable current on the outside edge.
Safety & Access At Alligator Deep
Hazards, restrictions, and access requirements.
Key Hazards
Dangerous wildlife
Safety Notes
Large sharks may be encountered on the deeper side; plan conservatively and maintain awareness at depth.
Access Restrictions
Alligator Deep is an offshore boat-access reef site rather than a self-guided shore entry.
Legal Notes
Protected wildlife and sanctuary rules apply in the reef system, and divers should avoid disturbing coral, wildlife, or any protected reef structure.
Local Intel For Alligator Deep
Community notes to help plan your visit.
Scuba Diving
Deeper reef edges reach about 30 m.
Freediving
Freedive use is possible from a support boat but the deeper outer-reef character makes scuba the more common format.
Snorkeling
This is not the most natural snorkel choice compared with shallower nearby Alligator sections.
Wildlife at Alligator Deep
Species commonly reported at this site, with direct links into their wildlife guides.
Recent Logged Visits At Alligator Deep
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Alligator Deep
Average conditions based on logged dives & visits.
Conditions
Avg. Visibility18m
Activity
No dive activity logged yet.
