Quinns Rocks, Australia offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Quinns Rocks is known for its beautiful beaches and the nearby Yanchep National Park. The best time to travel to Quinns Rocks, Australia, is from November to March, with average air temperatures around 25-30°C (77-86°F) and water temperatures around 20-23°C (68-73°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!