Shoalwater, Australia offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Shoalwater, Western Australia, Australia, is known for Penguin Island and the Shoalwater Islands Marine Park. The best time to travel to Shoalwater, Australia, is from December to February, with average air temperatures around 25-30°C (77-86°F) and water temperatures approximately 22-24°C (72-75°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!