Humacao, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Humacao is known for Palmas del Mar, a large resort community featuring golf courses, beaches, and a marina. The best time to travel to Humacao, 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!