Hat Head, Australia offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Hat Head, New South Wales, Australia, is known for Hat Head National Park and its pristine beaches. The best time to travel to Hat Head, Australia, is from December to February, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 23°C (73°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!