– Best diving April to October; water 27-29°C, visibility 15-35 m.
– Liveaboards from about USD 2,600 per person per week; dive resorts roughly USD 150-300 per night.
– Reach Berau (BEJ) via Balikpapan, then road to Tanjung Batu and speedboat to the islands.
Discover the Derawan archipelago, a constellation of islands and atolls in Indonesia’s East Kalimantan, where the ocean’s embrace reveals an underwater world of unparalleled beauty. From the expansive lagoon of Maratua to the tranquil waters of Sangalaki, each island offers a unique dive experience in an ecological haven.
Maratua: Big Fish Country and the Channel
Maratua Island, a large atoll with a central lagoon, is renowned for its exhilarating dive sites, including the famed Big Fish Country. This channel serves as a natural funnel, connecting the inner lagoon to the Celebes Sea. Here, experienced divers encounter a “tornado” of around 1,000 barracuda, along with schools of snapper, tuna, and the occasional hammerhead shark, all navigating the strong currents.
Beyond the barracuda spectacle, Maratua’s Turtle Traffic site promises frequent encounters with green and hawksbill turtles. Divers are advised that the currents at Big Fish Country can be significant, making it an ideal challenge for those with advanced skills seeking the thrill of large marine life in its natural habitat. See our full guide to Derawan dive sites and routes for site-by-site detail.
Sangalaki and the Reef Manta Parade
Sangalaki Island is a sanctuary for reef manta rays, particularly at dive sites like Manta Run and Manta Parade. These gentle giants, identified as Mobula alfredi, gracefully glide through shallow to mid-depth waters, drawn in by the island’s feeding currents and cleaning stations. During the Southeast Monsoon from April to October, divers can witness groups of 5–20 mantas, sometimes more, as plankton blooms attract them in greater numbers.
Recognised for its vibrant coral gardens and abundant marine life, Sangalaki also sees a peak in green turtle nesting during the warmer months, when females come ashore on the island’s quiet beaches. The shallow profile of the manta sites means long, unhurried encounters in good light, which is why we favour Sangalaki for travellers more interested in photography and patient observation than deep, current-swept walls. Read the definitive Derawan diving guide for what to expect across the archipelago.
Kakaban’s Stingless Jellyfish Lake
Unique among the world’s few dozen marine lakes, Kakaban’s enclosed brackish lake is home to a mesmerising population of stingless jellyfish. Dominated by Cassiopea and a golden jellyfish morph, these creatures have evolved without predators, allowing snorkellers to swim among them without harm, provided they follow local guidelines like forgoing fins and wearing life jackets.
Accessed via a boardwalk from the island’s shore, the lake offers a depth of approximately 10–17 metres. This natural wonder is one of only a handful of such lakes globally, offering a rare opportunity to observe jellyfish in their serene, predator-free environment.
Aboard a Derawan Liveaboard
For those seeking the ultimate diving experience, a Derawan liveaboard offers unparalleled access to the archipelago’s remote dive sites. With packages starting around USD 2,600 per person for a week-long voyage, these luxury vessels provide comfort, convenience, and the freedom to explore multiple islands, including Maratua, Sangalaki, and Kakaban, without the constraints of land-based itineraries.
Liveaboard guests enjoy seamless transitions between dive sites, with itineraries often including encounters with whale sharks at Talisayan’s bagan platforms during the April to October window. These voyages are crafted for those who appreciate the finer details of travel, with every aspect meticulously planned to enhance the diving adventure. Compare boats and cabins on our liveaboard fleet page, or browse curated voyage packages.
A Curated Land-Based Stay on Maratua
For travellers preferring to anchor their journey, Maratua offers an range of mid- to high-end dive resorts, with nightly rates typically ranging from USD 150 to 300. These retreats provide full board and diving packages, ensuring that guests can immerse themselves in the island’s natural beauty while enjoying the comforts of premium accommodation.
Whether set in a beachfront villa or a quiet overwater bungalow, guests can expect a considered blend of comfort and authenticity, with full-board dining and shore-based diving built around the day’s conditions. With easy access to Maratua’s 20-plus named dive sites and the calm marine life of its inner lagoon, a land-based stay suits travellers who prefer to settle into one island and dive at an unhurried pace, returning each evening to the same familiar room. See indicative Derawan trip pricing and cost breakdowns.
When to Travel: Seasons, Water and Visibility
The Derawan Islands shine brightest from April to October, when the dry season graces the region with clear skies and calm seas. During this peak period, water temperatures hover between 27 and 29°C, offering divers optimal conditions to explore the archipelago’s depths.
Visibility typically ranges from 15 to 35 metres, depending on currents, plankton levels, and rainfall. This clarity allows for unparalleled views of the underwater landscape, making it the preferred time for divers to experience the full spectrum of marine biodiversity that the Derawan Islands have to offer. Common timing questions are answered on our Derawan travel FAQ.
Getting There: Balikpapan, Berau and the Speedboat
The journey to the Derawan Islands begins at Kalimarau Airport (BEJ) in Tanjung Redeb, Berau Regency, reached via a domestic flight from Balikpapan’s Sultan Aji Muhammad Sulaiman Airport (BPN). From Berau, a 2–3 hour road transfer takes travellers to Tanjung Batu harbour.
From Tanjung Batu, a speedboat ride of 30–45 minutes will deliver you to Derawan Island, while Maratua is a slightly longer journey of 1.5–2 hours. For those seeking an alternative path, some liveaboards offer routes via Tarakan (TRK), incorporating overnight sailings or extended boat transfers into the itinerary.
How We Curate Your Voyage
At Kalimantan Luxury, each voyage to the Derawan Islands is crafted with precision and care. We collaborate with hand-checked operators, ensuring that every aspect of your trip meets our exacting standards. Our commitment to honest, independent advice means that your preferences and interests guide every recommendation.
Your planning begins with a private WhatsApp conversation, where we listen to your diving experience, your preferred pace and the dates you have in mind, then shape a bespoke itinerary across Maratua, Sangalaki, Kakaban and Derawan. Because we are independent, our advice on operators, transfers and timing is honest rather than commission-led, and every recommendation is one we would happily make to a close friend planning their first trip to East Kalimantan. Start a private WhatsApp planning conversation or request a tailored Derawan quote.