Mitchell Plateau, Australia offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Mitchell Plateau, Western Australia, Australia, is known for the Mitchell Falls and the ancient Gwion Gwion rock art. The best time to travel to Mitchell Plateau, Australia, is during the dry season from May to September, when the average air temperature is around 28°C (82°F) and water temperature is approximately 25°C (77°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!