Dapdap, Australia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Dapdap, Northern Australia, Australia, is known for its proximity to Kakadu National Park. The best time to travel to Dapdap, Australia, is during the spring months of September to November, when the average air temperature is around 20-25°C (68-77°F) and the water temperature is approximately 18-22°C (64-72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!