Mbengu, Indonesia offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Mbengu, East Nusa Tenggara, Indonesia, is known for its stunning natural landscapes and traditional Sumba culture. The best time to travel to Mbengu, Indonesia, is from May to September, with average air temperatures around 27°C (81°F) and water temperatures near 28°C (82°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!