Cottesloe, Australia offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Cottesloe is known for Cottesloe Beach, a popular destination for swimming, surfing, and the annual Sculpture by the Sea exhibition. The best time to travel to Cottesloe, Australia, is from November to March, 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!