Prince Regent River, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Indianapolis is known for the Indianapolis Motor Speedway and the Indianapolis 500. The best time to travel to Prince Regent River, Australia, is during the dry season from May to September, when the average air temperature is around 25-30°C (77-86°F) and water temperature is approximately 22-25°C (72-77°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!