Alligator Reef
Protected Area
Alligator Reef Sanctuary Preserva Sanctuary
Why dive here
With 87+ marine species recorded in the area - including bull sharks, dolphins, hammerhead sharks, seahorses and sea turtles - Alligator Reef offers some of Florida Keys's richest reef diving. Water ranges 19-32°C, warmest July, August, September.
Alligator Reef, just off Islamorada, is one of our favourites in the Upper Keys. It’s got that classic spur-and-groove formation, really defined, making for some interesting swim-throughs and overhangs. We often find ourselves just drifting along the deeper sections, watching schools of snapper and grunt huddle under the ledges, or spotting hogfish digging in the sand. Keep an eye out for the smaller stuff too, the Notchtongue Gobies are always a treat if you take the time to look closely at the coral heads. The visibility here is usually pretty solid, often 20 metres plus, especially on an incoming tide. We like hitting it early in the morning before the day boats crowd the mooring balls, that's when you sometimes get lucky with a passing silky shark on the deeper edges. It’s a good spot for intermediate divers; the currents can pick up, but nothing too wild. Just keep an eye on your dive guide and enjoy the drift.
Nearest Dive Centres to Alligator Reef
Dive shops near Alligator Reef
Key Dives
Deep Sea Scuba
Islamorada Dive Center
Florida Sea Base
Florida Keys Dive Center
Conch Republic Divers
Reviews for Alligator Reef
Conditions
Ocean conditions, forecast and tides for Alligator Reef
Alligator Reef Ocean Conditions
Monthly averages for Alligator 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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