Wyomi, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Wyomi, South Australia, Australia, is known for its proximity to the scenic Coorong National Park. The best time to travel to Wyomi, 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 21°C (70°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!