Puerto Grau, Peru offers 1 beach perfect for sunbathing, surfing, swimming, and more. Puerto Grau, Tacna, Peru, is known for its vibrant Mercado Central and the historic Arco Parabolico. The best time to travel to Puerto Grau, Peru, is from December to March, with average air temperatures around 80°F (27°C) and water temperatures near 77°F (25°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!