Denis Island and Bird Island are the northernmost islands in the Seychelles, and the only two coral cays of the granitic bank of the archipelago. On these sanctuaries islands, where tens of thousands of marine birds comes to nest each year, nature reigns. Fringed by coral reefs, Bird and Denis are true snorkeling paradises, where hawksbill sea turtles, blacktip reef sharks, rays and tropical fish are all very common.
Bird and Denis Island are coral cays surrounded by white sand beaches. From the closed lagoons, on the eastern side of the islands, to the shallow seagrass and coral areas, on their western side, Bird and Denis offer a wide variety of marine environments.
Their waters are home to outstanding marine life: hawksbill sea turtles resting under the surface, inoffensive juvenile blacktip reef sharks sneaking out the rocks, spotted eagle rays darting above the seagrass, sea anemones hosting couples of skunk clownfish, and a wide variety of other species (angelfish, triggerfish, butterflyfish…).
Bird Island and Denis Island, like the other islands of the granitic bank of Seychelles, enjoy a tropical climate and pleasant temperatures all year-round. Unlike other groups of islands in Seychelles (Aldabra or the Farquhar islands), they are not in the path of cyclones.
Snorkeling is possible all year round, with average water temperatures of 82°F/28°C. From October to March, rains are more frequent (with a peak in January), the temperatures are highest (+/-86°F/30°C) and there is most humidity.
From April to September there is a cooler and dryer period, but it is also windier (+/-75°F/24°C). As the wind has a certain amount of importance in snorkeling, you should remember that the prevailing wind is north-westerly from October to March and south-easterly from April to September.
The inter-seasons (March to May and September to November) are the best periods for snorkeling.
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Frequently sighted around Bird and Denis Islands
Commonly seen on all spots
Regular sightings in Denis Island, even in the shallow areas
At Denis Island; rare elsewhere in the Seychelles
On all spots
Reef and lagoon with turtles, rays and sharks
Level: Resort nearby
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