Manati, United States offers 8 beaches perfect for sunbathing, surfing, swimming, and more. Manati, Puerto Rico, United States, is known for the Mar Chiquita beach and the historic Hacienda La Esperanza. The best time to travel to Manati, United States, is from December to April, with average air temperatures around 75-85°F and water temperatures near 79-82°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!