Lighthouse Reef is an atoll dive destination defined by dramatic vertical walls, drop-offs, and the cavern topography of the Great Blue Hole. Most sites are boat-access only, spread across the atoll's outer edge and inner cayes. Walls begin shallow before plunging into deep water, suiting everyone from beginners at sites like Julie's Jungle and Chris's Chimney to advanced divers descending into the Great Blue Hole. Drift conditions feature at several outer-wall sites. French Angelfish, Atlantic Tarpon, Nurse Shark, and Groupers are observed consistently across the reef, with Caribbean Reef Shark adding occasional encounters at depth.
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Monthly water temperature across Lighthouse Reef's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water stays warm throughout the year, rising slightly from the cooler months of January through March toward a peak in late summer and early autumn. The clearest conditions and greatest diver activity fall between March and May, making the spring shoulder period particularly rewarding. Exposed outer walls can carry down currents, so conditions vary between the sheltered inner-caye sites and the open atoll edge.
80 operators
7 more sites to explore
Water temperature around Lighthouse Reef ranges from about 27°C in January to 30°C in August, based on satellite sea-temperature data for its dive sites.
With water around 27–30°C, a rash guard or 3mm shorty works in Lighthouse Reef year-round.
Fin maps 19 sites in Lighthouse Reef (18 scuba diving sites and 2 snorkelling spots, with some suited to both).
Across Lighthouse Reef's dive sites, March, April, May and June are most often reported as the best months to visit.
Observations across Lighthouse Reef sites record French Angelfish, Rock Beauty, and Atlantic Tarpon as very commonly encountered species. Nurse Shark and Spotted Moray are also frequently sighted, alongside Groupers, Oceanic Triggerfish, and Great Barracuda. Divers willing to explore more carefully may also come across Caribbean Reef Octopus, Spotted Scorpionfish, and the Fairy Basslet tucked into reef crevices.
A good proportion of sites here are rated for beginners, including Julie's Jungle, Chris's Chimney, and Long Caye Ridge. These sites feature calm conditions, manageable depths, and no significant current. The Great Blue Hole and outer-wall sites such as West Point are rated intermediate to advanced due to depth and the presence of down currents, so less experienced divers have plenty of options while skilled divers can push deeper.
The Great Blue Hole sub-area centres on a single site with a distinctive cavern and blue-hole topography, suited to advanced divers. The broader atoll offers a mix of shallow coral formations at inner-caye sites and steep vertical walls along the outer edge, where drift conditions and drop-offs are more common. Sites around Long Caye span beginner-friendly reef tops through to deeper wall dives, giving the atoll as a whole a wide range of experiences.
Almost all sites at Lighthouse Reef are reached by boat, reflecting the atoll's remote offshore position. Long Caye Ridge is the one exception, listed with both boat and shore entry options. Operators including Itza Resort, Huracan Diving Lodge, and Long Caye Dive Service run trips across the atoll, and choosing a lodge-based operator is the most practical way to dive the full range of sites.
