Cayo Rosario, Cuba offers 1 beach perfect for sunbathing, surfing, swimming, and more. Cayo Rosario, Isle of Youth, Cuba, is known for its vibrant coral reefs and diverse marine life, making it a popular destination for snorkeling and diving enthusiasts. The best time to travel to Cayo Rosario, Cuba, is from December to April, with average air temperatures around 75-85°F (24-29°C) and water temperatures around 77-82°F (25-28°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!