Puerto de Casma, Peru offers 1 beach perfect for sunbathing, surfing, swimming, and more. Puerto de Casma is known for its beautiful beaches and rich archaeological sites. The best time to travel to Puerto de Casma, Peru, is from December to March, when the average air temperature is around 25-30°C (77-86°F) and the water temperature is approximately 22-24°C (72-75°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!