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Aldabra Island, Seychelles Overview

Aldabra is the world’s second largest coral atoll. It is situated in the Aldabra Group of islands in the Indian Ocean that are part of the Outer Islands of the Seychelles. Belongs to the Aldabra Group, one of the island groups of the Outer Islands of the Seychelles, which includes the island of Assumption and the atolls of Astove and Cosmoledo.

At more than 700 miles (1,100 km) from Mahe, the principal island of the Seychelles, it is closer to the coast of Africa, and is in the most southwesterly part of the Seychelles. It is 265 miles (426 km) northwest of Madagascar and a similar distance northeast from the Comoro Islands. The reef limestones (with irregular beds called “champignon”) extend over an average width of 2 kilometres (1.2 mi) rising to a height of 8 metres (26 ft) above sea level, and forming the rim line of the shallow central lagoon are of late Quaternary period.

Aldabra Island, Seychelles Ports of Call Cruise Discounts from

Detailed Map of Aldabra Island, Seychelles

Aldabra Island, Seychelles Detailed Map Ports of Call Cruise Discounts from


The Aldabra atoll is situated in the dry zone of the southwest Indian Ocean. The north-westerly monsoon winds from November to March constitutes the rainy season when rainfall is heavy. In the remaining months, the south-easterly trade winds are recorded. It receives, on an average, 960 millimetres (38 in) rainfall per year (1,100 millimetres (43 in) is also reported).

Cyclones are rare in the Seychelles on account of its nearness to the Equator but the atoll experiences them occasionally when heavy storms have been recorded. Tides in the coastal zone rise to more than 3 metres (9.8 ft) height causing channel currents, and huge influx of water; the main channel drains 60% flow into the lagoon. The reported monthly mean maximum temperature recorded in December is 31 °C (88 °F). The minimum temperature recorded in August is 22 °C (72 °F). Access from the Indian Ocean to the lagoon is through two major channels and one smaller channel and also by many smaller reef passages.