Lagunas, Peru offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Lagunas, Lambayeque, Peru, is known for the Pacaya-Samiria National Reserve. The best time to travel to Lagunas, 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!