Southeast Maluku Expedition
Forgotten Islands Phinisi Charter
The Forgotten Islands are the remote arc of southeast Maluku between Timor and the Kei Islands, and a private phinisi charter is the only practical way to explore them. Crossings run September to November, with an April–May shoulder, typically 10–12 nights between Saumlaki and Tual, from $5,500 per night all-inclusive for the full yacht.
The Last Frontier
There are no dive resorts here, no marinas, and in most anchorages no phone signal. That is precisely the point. Luxury Phinisi has arranged expedition charters across eastern Indonesia since 2018, pairing UNESCO-listed hull craftsmanship from Bira and Tana Beru with modern navigation, safety systems, and Starlink — the self-sufficiency this route demands. If you are new to the vessel type itself, start with our guide to what a phinisi is, then come back for the wildest itinerary in our portfolio.
The Region
What — and Where — Are the Forgotten Islands?
The Forgotten Islands is the diving world's name for the Kepulauan Terselatan and Barat Daya groups of southeast Maluku: a 1,000-kilometre sweep of islands strung between the Banda Sea and the Arafura Sea. The chain includes Tanimbar, the Babar group (Dai, Dawera, Daweloor), Damar and the twin Terbang islands, Romang, Leti, Moa, Lakor, and Sermata, with the volcanic outposts of Nila, Serua, and Manuk standing off to the north on some routings.
Dutch traders charted these waters centuries ago and then largely left them alone; the modern name stuck because the islands sat outside every shipping lane, flight path, and tourism circuit that followed. A handful of expedition liveaboards transit the arc each season. Beyond that, visitors are so rare that entire villages turn out when a sail appears on the horizon. Several competitors name-check this route; almost none actually run it. We do — and we plan it properly.
When to Sail
Best Time for a Forgotten Islands Liveaboard
The route is governed by the Banda Sea's two calm windows. The primary season is September to November, when seas flatten between the southeast and northwest monsoons, visibility stretches past 30 metres, and pelagic activity peaks. A shorter shoulder opens in April and May as the pattern reverses. Outside these windows, open-water crossings between island groups become uncomfortable or simply unsafe, and reputable operators do not schedule them.
| Months | Conditions | Verdict |
|---|---|---|
| September – November | Calm seas, 25–40 m visibility, hammerhead schools, whale migration through the Banda Sea | Prime season — book 9–12 months ahead |
| April – May | Transition calm, warm water, fewer boats in the region | Excellent shoulder window |
| December – March | Northwest monsoon, exposed crossings | Not offered |
| June – August | Southeast trade swell across the Arafura side | Not offered |
October is the sweet spot: settled weather, the best odds of schooling hammerheads, and blue whales and pilot whales moving through the deep channels on their seasonal passage.
The Crossing
The Route: Saumlaki to Tual
The classic crossing links Saumlaki, capital of the Tanimbar Islands, with Tual in the Kei Islands — a one-way expedition through waters that see fewer divers in a year than Komodo sees in a morning. Because the route is linear, you never backtrack; every anchorage is new.
Below the Waterline
Diving here is defined by walls. Sheer coral faces drop from the surface past 40 metres, carpeted in hard coral that has never been anchored on, dynamited, or crowded. Expect grey reef sharks patrolling the drop-offs, dogtooth tuna and Spanish mackerel in the blue, mobula rays on current points, and — in October and November — genuine chances of scalloped hammerhead schools off the deeper seamounts. Routings that arc north past Manuk add one of the ocean's strangest spectacles: aggregations of olive sea snakes that ride divers' bubble streams on an uninhabited volcano ringed by fish soup. Night dives on the Babar group reefs reveal Spanish dancers, bobtail squid, and crustacean life that has never seen a torch beam.
Above the Waterline
Surface days are half the story. Tanimbar and the southwest Maluku islands keep an ikat weaving tradition alive that predates any tourist market — textiles are made for ceremony, not for sale. Village visits are arranged through the kepala desa with respect and, often, considerable mutual curiosity. Between landfalls you get volcanic cones rising sheer from deep water, beaches without a single footprint, and — with zero light pollution across the entire arc — the Milky Way from horizon to horizon. Your chef shops the last proper market in Saumlaki, then works from the yacht's stores and the day's catch. Kayaks and paddleboards come off the deck at every anchorage, and the tender runs beach picnics, drone sessions, and sunset rides along coastlines no charter guest has photographed before.
Trip Length
How Many Nights Do You Need?
Plan on 10 to 12 nights. The arc is long, the distances between island groups are real, and overnight passages are part of the rhythm: dive and explore by day, cross by night. Ten nights covers the core Saumlaki–Tual line with two to three sites per day. Twelve nights adds the northern volcanic outliers or extra time in the Babar group. Anything under seven nights forces you to skip half the chain, and we would rather point you to a tighter route — our Banda Sea phinisi expedition delivers a similar remote character in a more compact geography.
At a Glance
Charter Facts: Forgotten Islands
| Season | September – November (prime) · April – May (shoulder) |
|---|---|
| Route | Saumlaki → Tual (or reverse), one-way crossing |
| Access airports | Saumlaki (SXK) and Langgur/Tual (LUV), both via Ambon (AMQ) |
| Minimum nights | 10 recommended · 7 absolute minimum |
| From-price | $5,500 per night, full boat, all-inclusive |
| Best for | Experienced divers, expedition travellers, repeat Indonesia guests |
| Charter style | Private full-boat only — no scheduled departures |
Day by Day
Sample 11-Night Itinerary
| Days | Area | Highlights |
|---|---|---|
| 1 | Saumlaki, Tanimbar | Board, safety briefing, check dive, ikat village visit |
| 2–3 | Tanimbar north coast | Wall dives, sheltered bays, night dive |
| 4–5 | Babar group (Dai, Dawera) | Untouched reefs, village landfall, critter night dives |
| 6–7 | Damar & Terbang islands | Signature walls, pelagic points, volcanic scenery |
| 8 | Romang / Sermata line | Current points, dogtooth tuna, mobula |
| 9–10 | Northern seamounts (Nila–Serua–Manuk arc, conditions permitting) | Hammerhead chances, sea snake aggregations at Manuk |
| 11 | Kei approach → Tual | Final dives, Pasir Panjang beach, farewell dinner, trip ends at Tual pier |
Every itinerary is a framework, not a contract with the weather. Your captain sequences anchorages around sea state and current windows — a flexibility only a private charter allows.
The Vessels
The Right Phinisi for This Crossing
Not every yacht in Indonesia can run this route, and we are selective about which of ours we propose. A Forgotten Islands crossing requires genuine range and redundancy: long-haul fuel capacity, watermakers, a full dive setup with compressor and nitrox, twin tenders, and Starlink for weather routing and guest connectivity where no signal exists. These are the standards we build to — heritage ironwood and teak hulls from the Konjo shipwrights of South Sulawesi, the boat-building tradition UNESCO inscribed in 2017, fitted out with modern navigation and safety systems.
Expedition-capable vessels in our luxury phinisi fleet start in the Premium tier — 25–35 metres, six to twelve guests, from $5,500 to $12,000 per night — while Ultra-class yachts of 35–50 metres for eight to fourteen guests run $12,000 to $20,000 per night. All rates are full-boat and all-inclusive: crew, dive team, chef, meals, fuel for the stated route, and equipment. One-way crossings carry no repositioning surcharge when scheduled within the season's natural flow. Full tier-by-tier detail is on our charter rates page.
Route Pairings
Combining the Forgotten Islands with Other Routes
Because the crossing is one-way, it pairs beautifully with adjacent regions in the same season:
- Banda Sea link: extend north from Tual through the Banda Islands' nutmeg history and sea-snake volcanoes — the natural continuation, covered on our Banda Sea expedition page.
- Alor start: begin further west with the muck diving and tribal highlands of the Alor & Pantar charter route, then ride the calm window east.
- Onward to West Papua: October–November crossings position the yacht for the season opening in Raja Ampat — our Raja Ampat 7-day itinerary shows what awaits — or for the whale sharks of Triton Bay.
Multi-region voyages of 14 to 21 nights are our specialty; see long-range phinisi voyages for how we structure them, or browse all twelve charter destinations to plan the season around your dates. Divers comparing routes across the archipelago should also read our Indonesia dive liveaboard hub.
Logistics
Getting There: Airports & Logistics
Both ends of the route are served by domestic flights through Ambon (AMQ), which connects daily with Jakarta and Makassar. For the eastbound crossing, fly Ambon to Saumlaki's Mathilda Batlayeri Airport (SXK); at the far end, depart from Karel Sadsuitubun Airport (LUV) at Langgur, serving Tual and the Kei Islands. We recommend arriving a day early — Saumlaki has simple, clean guesthouses — and our team confirms every flight leg against the boarding schedule before you travel. Transfers between airport and pier are included at both ends.
Pack light and soft-sided: regional aircraft enforce 20 kg hold limits, and everything you truly need — dive gear, toiletries, laundry service — is already on board. Bring reef-safe sunscreen, a long-sleeve rash guard, and cash in small rupiah notes for village handicrafts; there are no ATMs between Saumlaki and Tual.
Questions
Forgotten Islands Charter FAQ
How much does a Forgotten Islands phinisi charter cost?
Do I need advanced diving experience?
Is there internet on board in such a remote area?
Can the route run in reverse, from Tual to Saumlaki?
Begin The Expedition
Ready to see the islands the rest of the world forgot?
Tell us your dates and group size via our enquiry form or message us directly on WhatsApp at +62 811 382 3875 — we will respond with a route proposal, yacht options, and a firm quote within 24 hours.
Enquire on WhatsApp