Cayo Guillermo, Cuba offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Cayo Guillermo is known for its stunning beaches, including Playa Pilar, and its connection to Ernest Hemingway, who was inspired by the area. The best time to travel to Cayo Guillermo, Cuba, is from December to April, with average air temperatures around 25-28°C (77-82°F) and water temperatures about 26°C (79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!