Trpanj, Croatia offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Dongara, Western Australia, Australia, is known for the Irwin River, Port Denison, and the historic Priory Hotel. The best time to travel to Trpanj, Croatia, is from June to September, when the average air temperature is around 25°C (77°F) and the sea temperature is approximately 24°C (75°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!