Hindmarsh Island, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Hindmarsh Island is known for the Hindmarsh Island Bridge and the Coorong National Park. The best time to visit Hindmarsh Island, Australia, is from December to February, with average air temperatures around 20-25°C (68-77°F) and water temperatures around 18-20°C (64-68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!