Cooktown, Australia offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Cooktown is known for the James Cook Museum and the nearby Great Barrier Reef. The best time to travel to Cooktown, Australia, is from May to September, with average air temperatures around 25°C (77°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!