Rushy Lagoon, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Rushy Lagoon, Tasmania, Australia, is known for its proximity to the stunning natural landscapes of the Tarkine rainforest and the Arthur River. The best time to travel to Rushy Lagoon, Australia, is during the summer months of December to February, when the average air temperature is around 20-25°C (68-77°F) and the water temperature is approximately 18-22°C (64-72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!