Tumby Bay, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Tammalang is known for being the gateway to the beautiful Tarutao National Marine Park. The best time to visit Tumby Bay, Australia, is from 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!