Armstrong Beach, Australia offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Armstrong Beach is known for its proximity to the Great Barrier Reef and the Cape Hillsborough National Park. The best time to visit Armstrong Beach, Australia, is from May to September, with average air temperatures around 20-25°C (68-77°F) and water temperatures approximately 22-25°C (72-77°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!