Kwinana Beach, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Kwinana Beach is known for its scenic coastline and recreational activities in Western Australia. The best time to visit Kwinana Beach, Australia, is from December to February, with average air temperatures around 25°C (77°F) and water temperatures near 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!