Potrero, Costa Rica offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Potrero, Guanacaste, Costa Rica, is known for its proximity to the beautiful Playa Potrero and the nearby Las Catalinas development. The best time to travel to Potrero, 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!