Mariano Damaso Beraun, Peru offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Mariano Damaso Beraun, Huanuco, Peru, is known for its proximity to the Tingo Maria National Park and the famous Cueva de las Lechuzas. The best time to travel to Mariano Damaso Beraun, Peru, is from May to September, with average air temperatures around 25°C (77°F) and water temperatures near 24°C (75°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!