Siesta Park, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Siesta Park, Western Australia, Australia, is known for its proximity to the beautiful Geographe Bay and the popular Busselton Jetty. The best time to travel to Siesta Park, Australia, is during the summer months of December to February, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 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!