The Aldabra Group lies deep in the outer Seychelles, far from the main island chain, and is reached almost exclusively by specialist liveaboard. The sites span a wide range of topography: shallow reef passes, walls, drop-offs, and strong-current drift dives through atoll channels reaching fifty metres. Visibility is highly variable across sites, from modest in the shallower passes to very high in the deeper channels. Species recorded include whale sharks, blacktip reef sharks, green sea turtles, Napoleon wrasse, and hairy frogfish. Assumption Island provides a gentler entry point with sheltered reef and seagrass snorkelling, while the main atoll channels demand solid buoyancy and current experience.
3 areas
2UNESCO-listed atoll in the remote outer Seychelles, with tidal drift dives, whale sharks, and reef sharks, liveaboard access only.
2Outer-Seychelles island with shallow reef and seagrass snorkelling alongside a forty-metre wall dive, within the remote Aldabra Group.
2Remote uninhabited atoll in the outer Seychelles with reef walls, deep drift dives, and whale sharks, boat access only.
Monthly water temperature across Aldabra Group's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Water temperatures drop noticeably from July to September compared with the warmer months of November through May. The best diving conditions align with the October-to-May period, when the water is warmer and conditions in the passes are more predictable.
1 operator
Seychelles
Water temperature around Aldabra Group ranges from about 25°C in July to 28°C in January, based on satellite sea-temperature data for its dive sites.
In the warm season (about 28°C) a rash guard or 3mm shorty is comfortable in Aldabra Group; in the coldest months (about 25°C) step up to a 3mm full suit.
Fin maps 6 sites in Aldabra Group (5 scuba diving sites and 1 snorkelling spots), organised into 3 areas.
Across Aldabra Group's dive sites, April, May, October and November are most often reported as the best months to visit.
