Florida Keys, United States
    Alligator Reef Sanctuary Preserva Sanctuary

    Alligator Reef

    Best months: Apr–Jun

    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.

    Best timeApr–Jun
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBull Sharks, Dolphins, Hammerhead Sharks, Seahorses and Sea Turtles · 87+ species recorded
    Water19-32°C · warmest July, August, September
    CharacterReef dive
    StandoutRich in charismatic marine life

    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.

    Today06:1918:0111h 43m daylightGolden hour 17:31

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    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)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    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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