Kaafu Atoll (Malé)

Kaafu Atoll wraps the Maldives capital region in the central Indian Ocean, with Malé island at the northern edge of the atoll, Hulhumalé reclaimed island and Velana International Airport across the lagoon, and a chain of resort islands including Kurumba, Bandos, and Baros stretching south through the atoll lagoon. The Maldives is the lowest-lying nation on Earth — average elevation about 1.5 metres above mean sea level, with the highest natural point at 2.4 metres — and the country has been the most prominent voice in the UNFCCC Small Island Developing States bloc on sea-level rise since the 1989 Malé Declaration. The tide here is a small mixed semidiurnal signal modulated by the atoll geometry: mean range at the Malé reference gauge is about 0.7 metres, climbing past 1.1 metres on the largest spring tides and dropping near 0.3 on neaps. Two highs and two lows of unequal size each day, with the asymmetry varying through the lunar month and the equatorial position keeping the seasonal cycle weak. The atoll lagoon hydrodynamics are distinctive — the ring of reef and the natural channels (kandus) between the islands concentrate tidal exchange, with currents through the deeper kandus exceeding two knots on the change of tide. The defining seasonal force is the monsoon. The iruvai north-east monsoon from December through April brings calmer weather on the western side of the atolls and the dive season; the hulhangu south-west monsoon from May through November drives swell, rain, and the surf season at the Pasta Point and Sultans breaks at the southern tip of North Malé Atoll. Resort dhonis crossing between islands, the working tuna fleet out of the Malé fish market at Dhaalu, the airport seaplane operations, and the snorkellers and divers reading the reef-shelf access at low water all read the table for different windows. The Maldives Meteorological Service and the National Bureau of Statistics publish the authoritative tide tables.