Watermans Bay, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Watermans Bay is known for its picturesque beaches and the nearby Marmion Marine Park. The best time to travel to Watermans Bay, Australia, is from November to March, with average air temperatures around 25°C (77°F) and water temperatures around 22°C (72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!