San Antonio, Peru offers 120 beaches perfect for sunbathing, surfing, swimming, and more. San Antonio, San Antonio is known for the Alamo and the River Walk. Lima, Lima is known for the historic center and the Larco Museum. Peru, Peru is known for Machu Picchu and the Sacred Valley. The best time to travel to San Antonio, Peru, is from May to September, with average air temperatures around 68°F (20°C) and water temperatures near 64°F (18°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!