Coffin Bay, Australia offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Coffin Bay is known for Coffin Bay National Park and its renowned Coffin Bay oysters. The best time to visit Coffin Bay, Australia, is from December to February, with average air temperatures around 20-25°C (68-77°F) and water temperatures about 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!