Santiago de Cao, Peru offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Santiago de Cao is known for the archaeological site of El Brujo, which includes the Lady of Cao Museum. The best time to travel to Santiago de Cao, Peru, is from December to March, with average air temperatures around 77°F (25°C) and water temperatures near 73°F (23°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!