Grand Cayman, Cayman Islands
    Victoria House- Treasure Island Resort (Grand Cayman)

    Lone Star Reef

    Best months: Dec–Mar

    Protected Area

    Victoria House- Treasure Island Resort (Grand Cayman)

    Why dive here

    With 327+ marine species recorded in the area - including barracuda, bull sharks, oceanic whitetip sharks, orcas and sea turtles - Lone Star Reef offers some of Grand Cayman's richest reef diving. Water ranges 27-31°C, warmest August, September, October.

    Best timeDec–Mar
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBarracuda, Bull Sharks, Oceanic Whitetip Sharks, Orcas and Sea Turtles · 327+ species recorded
    Water27-31°C · warmest August, September, October
    CharacterReef dive
    StandoutExceptional marine biodiversity

    Lone Star Reef is one of those spots we always try to hit when we're in Grand Cayman, especially if it's been a rainy week. At 17m max depth, it's a relaxed, easy dive, perfect for a long bottom time. What we love here are the ledges. They're draped in colourful sponges and a good mix of hard and soft corals, but it's what’s underneath that really grabs us. Peer into those shadows and you’ll often find glassy blennies, or the odd red clingfish tucked away. The real draw, though, is that freshwater exit on the south side. On a day when there's been some rain, you can feel the distinct thermocline pushing out. It’s a strange, cool rush against your skin, a reminder of the island’s geology, and it sometimes draws in interesting little critters. Keep an eye out on the surrounding sand patches for mottled flounders camouflaged flat against the bottom. This site really shines for macro enthusiasts and anyone looking for a chill dive with a unique geological twist.

    Today06:1918:0711h 48m daylightGolden hour 17:38

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    Conditions

    Ocean conditions, forecast and tides for Lone Star Reef

    Lone Star Reef Ocean Conditions

    Monthly averages for Lone Star Reef, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (19.38, -81.32) (5km away)

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    October Averages

    Sea Temperature

    30°C

    87°F · Range: 29.1–31.8°C

    Current Speed

    4.47 cm/s

    Direction: NW (296.6°)

    Chlorophyll-a

    0.045 mg/m³

    Very clear (oligotrophic)

    Salinity

    36.14 PSU

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

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