Los Pargos, Costa Rica offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Los Pargos, Guanacaste, Costa Rica, is known for Playa Negra, a popular surfing destination with its renowned black sand beach. The best time to travel to Los Pargos, Costa Rica, is from December to April, with average air temperatures around 85°F (29°C) and water temperatures near 82°F (28°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!