Santa Maria del Mar, Peru offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Santa Maria del Mar, Lima, Peru, is known for its beautiful beaches and vibrant summer nightlife. The best time to visit Santa Maria del Mar, Peru, is from December to March, with average air temperatures around 75°F (24°C) and water temperatures near 70°F (21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!