Great Mackerel Beach, Australia offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Great Mackerel Beach is known for its proximity to Ku-ring-gai Chase National Park and the scenic Pittwater area. The best time to visit Great Mackerel Beach, Australia, is from December to February, with average air temperatures around 25°C (77°F) and water temperatures around 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!