Long Island, Australia offers 6 beaches perfect for sunbathing, surfing, swimming, and more. Long Island is known for its stunning beaches and proximity to the Great Barrier Reef. The best time to travel to Long Island, Australia, is from May to September, with average air temperatures around 23°C (73°F) and water temperatures near 24°C (75°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!