Cossack, Australia offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Cossack is known for its well-preserved 19th-century buildings and the Cossack Heritage Trail. The best time to travel to Cossack, Australia, is from May to September, with average air temperatures ranging from 15°C to 30°C and water temperatures around 22°C. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!