Coronet Bay, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Coronet Bay, Victoria, Australia, is known for its proximity to Phillip Island and the scenic views of Western Port Bay. The best time to travel to Coronet Bay, Australia, is during the summer months of December to February, when the average air temperature is around 20-25°C (68-77°F) and the water temperature is approximately 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!