Johanna, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Johanna is known for the Great Ocean Road and Johanna Beach, popular for surfing and scenic views. The best time to travel to Johanna, 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!