Barrios Unidos, Panama offers 1 beach perfect for sunbathing, surfing, swimming, and more. Barrios Unidos, Cocle Province, Panama, is known for its proximity to the famous El Valle de Anton, a picturesque town located in the crater of an extinct volcano. The best time to travel to Barrios Unidos, Panama, is during the dry season from December to April, with average air temperatures around 80°F (27°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!