Wonthaggi, Australia offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Wonthaggi is known for its historic State Coal Mine, which offers underground tours and insights into the region's mining heritage. The best time to travel to Wonthaggi, 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!