Dunsborough, Australia offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Dunsborough is known for its stunning beaches and proximity to the Margaret River wine region. The best time to travel to Dunsborough, Australia, is from November to April, with average air temperatures ranging from 20-30°C (68-86°F) and water temperatures around 20-22°C (68-72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!