French Island National Park, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. French Island National Park, Victoria, Australia, is known for its diverse wildlife, including the largest population of koalas in Victoria, and its scenic landscapes. The best time to visit French Island National Park, Australia, is during the summer months of December to February, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 20°C (68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!