Diving & Travel Guide to Sumba Island
Regional Overview
Sumba Island is one of Indonesia's last true diving frontiers, a rugged and culturally rich island south of Flores that remains almost entirely undiscovered by the international diving community. The island sits at the edge of the Indian Ocean, where deep oceanic trenches and powerful currents create conditions for spectacular wall diving and seasonal pelagic encounters. The western coast around Pero is emerging as a manta ray cleaning station, attracting divers seeking close encounters with these graceful giants in uncrowded waters. The Sumba Strait separating the island from Flores features dramatic deep walls plunging hundreds of meters, with nutrient-rich upwellings supporting vibrant coral communities and schooling fish. Around the small harbor town of Waikabubak, several WWII-era wrecks provide intriguing exploration opportunities for wreck enthusiasts. The northern coast near Mamboro offers pristine reef systems on exposed volcanic headlands, while the southern Indian Ocean coast delivers powerful surge and surge-channel diving for the most adventurous. Above water, Sumba is one of the most culturally fascinating islands in Indonesia, with its unique Marapu animist religion, iconic megalithic tombs, world-renowned ikat textiles, and the spectacular Pasola ritual horseback spear-fighting festival. For the diver who values cultural immersion alongside underwater exploration, Sumba offers an experience unlike any other destination in the archipelago. Geologically, the island is part of the Sumba Terrane, a unique continental fragment that has remained distinct from the surrounding volcanic arcs. This ancient landmass features a landscape of rolling savannahs and dramatic limestone plateaus, which extend underwater to form intricate cave systems and overhangs that are a dream for adventurous technical divers. The combination of its unique geology and its position at the edge of the deep ocean makes Sumba a biological crossroads where rare species from both the Indian and Pacific Oceans can be found.
Getting There
Sumba is served by Tambolaka Airport (TMC) in the west and Umbu Mehang Kunda Airport (WGP) in the east, with connecting flights from Bali, Kupang, and Surabaya via regional carriers. The island can also be reached by ferry from Flores (Labuan Bajo) to the northern port of Waikelo, though the journey takes several hours. Internal roads are improving but remain challenging in places, particularly on the southern coast. Given the limited infrastructure, most diving is organized through small local operators or as part of private charter boat expeditions.
Food & Drink
Sumbanese cuisine is simple, earthy, and deeply connected to the island's agricultural traditions, reflecting the rugged nature of the landscape. The diet revolves around corn, cassava, and rice, supplemented by locally raised pork, chicken, and fresh seafood from the surrounding Indian Ocean. The signature dish is a rich pork curry slow-cooked with local spices, and the island is known for its distinctive bitter coffee grown in the highland interior. In the main towns of Waingapu and Waikabubak, modest restaurants serve standard Indonesian fare alongside local specialties. The few resorts catering to surfers and cultural tourists offer a higher standard of dining with both local and western options. You will also find traditional dishes like 'Manu Pata'u', which is a ceremonial chicken dish prepared with coconut milk and local herbs. The volcanic soil in certain areas supports a variety of tropical fruits, and the local mangoes and papayas are exceptionally sweet. Dining in Sumba is often a communal experience, especially during festivals like Pasola, where large feasts are prepared for the entire community.
Diving Stats
Where to Base
Topside Adventures
Visit the megalithic tombs of Pasunga and Waikabubak
Attend the spectacular Pasola festival (February-March)
Explore traditional Sumbanese villages with towering peaked houses
Purchase world-class ikat textiles directly from master weavers
Visit the stunning Weekuri Lagoon (saltwater lake)
Surf the legendary left-hand breaks at Nihiwatu Beach