The Jardines del Rey off the north coast
The Jardines del Rey, or Gardens of the King, is a chain of cays lying off the provinces of Ciego de Avila and Camaguey. Cayo Coco is the best known and largest, reached from the mainland by a long causeway that runs across a shallow bay. Its beaches are wide and pale, and the surrounding flats are so shallow and calm that the water reads almost mint green in the sun.
Adjoining Cayo Guillermo is smaller and, for many visitors, even more striking. Playa Pilar, at its western tip, is repeatedly named among the finest beaches in the country for its low dunes and translucent water. Both cays are lined with resorts yet keep long stretches that feel open and uncrowded, especially early and late in the day.
Cayo Santa Maria and the Villa Clara cays
West of the Jardines del Rey, the Villa Clara cays extend off the north coast and are reached by one of the longest sea causeways in the region. Cayo Santa Maria is the anchor of this group, with broad beaches of fine white sand and the same shallow, sheltered shallows that make the northern cays so photogenic. Because they developed more recently, these cays tend to feel newer and are a popular alternative for travellers who want cay scenery without the longest domestic transfers.
The cays are low-lying and largely given over to nature and resorts rather than towns, so the appeal is squarely the sand, the water and the birdlife of the surrounding mangroves and lagoons rather than village life.
Cayo Largo del Sur on the southern side
Cayo Largo del Sur sits apart from the northern cays, lying off Cuba's south coast in the Canarreos archipelago and usually reached by air. It is celebrated above all for two beaches: Playa Paraiso and Playa Sirena, both known for exceptionally soft, bright sand and calm, shallow water that stays warm and clear. The cay has a relaxed, beach-first atmosphere and comparatively little beyond its shorelines and resorts, which is precisely the point for people who come here.
Across all of Cuba's cays, the same practical advice applies. The sand and shallows look their best under the settled skies and lighter winds of the dry winter months from November to April. During the June to November hurricane season, conditions on these exposed low islands can change quickly, so it is worth building weather flexibility into any cay-focused trip.