Key Largo, United States offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Key Largo is known for John Pennekamp Coral Reef State Park and the African Queen canal boat. The best time to travel to Key Largo is from December to April, with average air temperatures around 75°F (24°C) and water temperatures near 72°F (22°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!