South Bruny, Australia offers 14 beaches perfect for sunbathing, surfing, swimming, and more. South Bruny, Tasmania, Australia, is known for the South Bruny National Park and the Cape Bruny Lighthouse. The best time to travel to South Bruny, Australia, is during the summer months of December to February, when the average air temperature is around 20°C (68°F) and the water temperature is approximately 17°C (63°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!