Alyangula, Australia offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Alyangula, Northern Territory, Australia, is known for its proximity to the pristine beaches and rich marine life of Groote Eylandt. The best time to travel to Alyangula, Australia, is from May to September when the average air temperature is around 25-30°C (77-86°F) and the water temperature is approximately 25°C (77°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!