South Mackay, Australia offers 2 beaches perfect for sunbathing, surfing, swimming, and more. South Mackay, Queensland, Australia, is known for its proximity to the Great Barrier Reef and Eungella National Park. The best time to travel to South Mackay, Australia, is from May to September, with average air temperatures around 20-25°C (68-77°F) and water temperatures around 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!