Vivonne Bay, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Vivonne Bay, South Australia, Australia, is known for its stunning Vivonne Bay Beach and the nearby Seal Bay Conservation Park. The best time to visit Vivonne Bay, 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!