Umbakumba, Australia offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Umbakumba, Northern Territory, Australia, is known for its proximity to the Groote Eylandt archipelago and the unique cultural experiences offered by the Anindilyakwa people. The best time to travel to Umbakumba, Australia, is during the dry season from May to October, when the average air temperature is around 25-30°C (77-86°F) and the water temperature is approximately 25-28°C (77-82°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!