DivePlnr
    Deans Blue Hole dive site
    cenote
    Long Island, Bahamas

    Deans Blue Hole

    Best months: Sep–Jan

    Why dive here

    With 362+ marine species recorded in the area - including barracuda, blacktip reef sharks, dolphins, dwarf minke whales and humpback whales - Deans Blue Hole offers some of Long Island's richest cenote diving. Water ranges 26-30°C, warmest August, September, October.

    Best timeSep–Jan
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBarracuda, Blacktip Reef Sharks, Dolphins, Dwarf Minke Whales and Humpback Whales · 362+ species recorded
    Water26-30°C · warmest August, September, October
    CharacterCenote dive
    StandoutExceptional marine biodiversity

    Dropping into Dean's Blue Hole is a unique experience, a sheer wall descent into an enormous limestone cavern. You'll find yourself surrounded by schooling tarpon and snapper as you sink, with the occasional reef shark patrolling the edges. It’s a compelling spot for advanced divers looking for something a bit different, a truly vertical dive where the bottom is out of sight. The real draw here is the incredible depth and geological formation, not necessarily a vibrant coral reef.

    Safety Notes

    Overhead environment - never enter without proper cave/cavern training, redundant equipment, and a guideline.

    Today05:5517:4011h 44m daylightGolden hour 17:10

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    Conditions

    Ocean conditions, forecast and tides for Deans Blue Hole

    Deans Blue Hole Ocean Conditions

    Monthly averages for Deans Blue Hole, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (23.66, -74.95) (14km away)

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    October Averages

    Sea Temperature

    30°C

    85°F · Range: 28–30.8°C

    Current Speed

    8.94 cm/s

    Direction: NW (333.4°)

    Chlorophyll-a

    0.053 mg/m³

    Very clear (oligotrophic)

    Salinity

    36.55 PSU

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)

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