Zaostrog, Croatia offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Zaostrog is known for the Franciscan Monastery of St. Mary, which houses a rich library and a museum. The best time to travel to Zaostrog, Croatia, is from June to September, with average air temperatures around 25-30°C (77-86°F) and water temperatures around 23-26°C (73-79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!