Choosing the "best" beach island in Spain depends on your preference for scenery versus climate, but as of 2026, Mallorca and Gran Canaria are the top-rated contenders. Mallorca is widely considered the overall winner for sheer variety, home to the award-winning Platja de Muro, known for its turquoise Mediterranean waters, shallow entry, and white sand that rivals the Caribbean. The island also offers "Calas" (hidden rocky coves) like Cala Llombards that provide a more intimate, dramatic swimming experience. For those seeking a more exotic, Saharan feel, Gran Canaria is the choice, specifically for the Maspalomas Dunes, where massive golden sand hills meet the Atlantic Ocean. If you prioritize rugged, volcanic beauty and year-round warmth, Fuerteventura in the Canary Islands offers some of the best windsurfing and wide-open sandy stretches like Corralejo. For a chic, party-meets-paradise vibe, Formentera (accessible only by boat from Ibiza) boasts Ses Illetes, which consistently ranks among the clearest and most beautiful beaches in Europe.