Ajax Reef
Protected Area
Biscayne National Park
Why dive here
With 87+ marine species recorded in the area - including bull sharks, dolphins, hammerhead sharks, seahorses and sea turtles - Ajax Reef offers some of Florida Keys's richest reef diving. Water ranges 19-32°C, warmest July, August, September.
Ajax Reef, out in the Islamorada sanctuary, often gets overshadowed by its flashier neighbours, but we think that’s a mistake. It’s not just another Florida Keys reef; it’s a living, breathing example of resilience. Drop down here and you’ll find a sprawling coral labyrinth. We love the way the light plays through the deeper channels, illuminating huge heads of rose coral and artichoke coral. Keep an eye out for the yellow stingrays often tucked into sandy patches. What makes Ajax special for us are the schools of fish – not just a few stragglers, but proper groups of ocean triggerfish and schoolmasters moving in unison. We’ve spent whole dives just watching them drift past. The harlequin bass and black margates are also a constant presence, darting between the fire coral. It’s a great spot for macro too; we’ve often found banded pipefish hiding in the gorgonians. If you’re a diver who prefers a quieter, more intimate reef experience over dramatic walls, Ajax is your kind of place. Go on a weekday morning to really have it to yourself.
Nearest Dive Centres to Ajax Reef
Dive shops near Ajax Reef
Silent World
Austin's Dive Center
Scuba Quest Outlet
Silent World Dive Center
Divers Paradise
Grove Scuba
Reviews for Ajax Reef
Conditions
Ocean conditions, forecast and tides for Ajax Reef
Ajax Reef Ocean Conditions
Monthly averages for Ajax Reef, sourced from NOAA NDBC + Copernicus Marine (EU) - nearest station: 8725520 - Fort Myers, FL (28km away)
October Averages
Sea Temperature
27°C
81°F · Range: 20.9–31.1°C
Air Temperature
26°C
79°F
Current Speed
0 cm/s
Direction: S (180°)
Salinity
35.98 PSU
Wind Speed
2.7 m/s
5.2 knots
Atmospheric Pressure
1014.5 hPa
Based on 5 years of monitoring data · Data sources: NOAA NDBC + Copernicus Marine (EU)
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