Encounter Bay, Australia offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Encounter Bay, South Australia, Australia, is known for the Granite Island, the Whale Watching Centre, and the Heysen Trail. The best time to travel to Encounter Bay, Australia, is from December to February, with average air temperatures around 20-25°C (68-77°F) and water temperatures 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!