Cairns, Australia offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Cairns is known for the Great Barrier Reef and Daintree Rainforest. The best time to travel to Cairns, Australia, is from June to October, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 23°C (73°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!