Black Rock, Australia offers 6 beaches perfect for sunbathing, surfing, swimming, and more. Black Rock, Victoria, Australia, is known for the Black Rock Clock Tower and the scenic Half Moon Bay. The best time to travel to Black Rock, Australia, is during the summer months of December to February, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 21°C (70°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!