Tarwin Lower, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Tarwin Lower is known for its proximity to Wilsons Promontory National Park and the Tarwin River. The best time to travel to Tarwin Lower, 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 18-20°C (64-68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!