Lone Star Reef
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.
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.
Nearest Dive Centres to Lone Star Reef
Dive shops near Lone Star Reef
OCTOPUS
Divers Supply
Living the Dream Divers
Divers Down
Atlantis Dive Center
Don Foster's Dive Cayman, Ltd.
Reviews for Lone Star Reef
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)
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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