Mackay, Australia offers 6 beaches perfect for sunbathing, surfing, swimming, and more. Mackay is known for the Great Barrier Reef, Eungella National Park, and the Mackay Regional Botanic Gardens. The best time to travel to Mackay, Australia, is from May to September, when the average air temperature is around 20-25°C (68-77°F) and the water temperature is approximately 22-24°C (72-75°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!