Grantville, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Grantville, Victoria, Australia, is known for the Grantville Nature Conservation Reserve and its proximity to the scenic Bass Coast. The best time to travel to Grantville, 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 18-21°C (64-70°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!