Diving in Gaafu Dhaalu Atoll

Gaafu Dhaalu is the wild far-south half of Huvadhoo, one of the world's largest natural atolls, and its diving is built on current. The channels carry the show. When the tide pours through a kandu, divers hook in behind the reef and watch walls of grey reef sharks cruise past, while reef mantas and grey sharks queue at cleaning stations the same flow feeds. The signature dives sit close together in the Meradhoo cluster: Meradhoo Kandu is the wide marquee channel where pelagics, whitetips and trevally schools work the current and spinner dolphins pass through into the lagoon. Short Cut is the narrow channel next door, a table-coral wall with leopard sharks resting on the sand, a far-south speciality. Meradhoo Thila is the calmer coral pinnacle alongside, the slow dive to pair with the drifts. Around these, the western rim holds quieter channels like Hootu Kandu and pinnacles such as Vaadhoo Thila, and the southeast offers the accessible drift by the airport island. The setting is exceptional: around 130 kilometres of outer reef, the longest in the country, around the deepest atoll lagoon in the Maldives, with the big animals the real draw.

This is a long way south and a current-driven trip, so plan around access and conditions. Reach the atoll on a 55 to 90 minute domestic flight to Kaadedhdhoo, then a resort speedboat, or join a deep-south liveaboard at Kooddoo. The diving runs through resort dive bases and liveaboards rather than town dive shops, so the trip is built around your island or your boat; a handful of operators work the area, and far-south coverage and seasonal schedules are worth confirming at booking. Time the trip for the northeast dry monsoon, roughly January to March, for the calmest surface, the best visibility and the most reliable current; some liveaboards run the far south only in this window. Water is warm all year, so a 3mm suit is enough. Pick sites to your level: the channels are advanced drifts that reward reef-hook technique and confident SMB use, while the coral pinnacles and the accessible channel by the airport island are gentler. There is no atoll-wide reserve, permit or quota, but national rules protect mantas and whale sharks and ban shark fishing. One bit of local knowledge: the channels need a moving tide to fire, so the crew will pick the drop to the current rather than the clock.

The southwestern half of Huvadhoo, one of the world's largest natural atolls, built on around 130km of outer reef (the longest in the Maldives) cut by current channels (kandus), submerged pinnacles (thilas and giris), outer walls and an exceptionally deep central lagoon.