Bremer Island, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Bremer Island, Northern Territory, Australia, is known for Banubanu Beach Retreat. The best time to travel to Bremer Island, Australia, is from May to October, with average air temperatures around 25-30°C (77-86°F) and water temperatures 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!