The best time depends on the destination and route
For January to March, start with the Maldives, Central Raja Ampat or a Similan and Surin programme. For April and May, compare Tubbataha departures with the remaining Similan sailings and Maldives options. For July and August, Komodo has named summer programmes while the Maldives remains a year-round choice with wetter-season trade-offs. For October to December, Central Raja Ampat and the advertised Similan season return to the shortlist.
These are planning shortlists, not a worldwide ranking or a prediction for your week. Some windows describe an operator’s programme; others describe typical weather. Neither guarantees calm crossings, clear water, wildlife encounters or a cabin. The examples below identify which evidence supports each choice.
A practical liveaboard calendar
Swipe or scroll sideways to compare every column.
| Your decision | Start with these destinations | What the timing evidence means |
|---|---|---|
| January–March | Maldives; Central Raja Ampat; Similan and Surin | Maldives generally drier; White Manta recommends October–April for Central Raja Ampat; The Junk advertises October–May |
| April–May | Tubbataha; Maldives; late-season Similan departures | Master publishes Tubbataha March–June sailings; May approaches a monsoon transition in the Maldives and the end of the advertised Similan programme |
| June | Dated Komodo or Tubbataha departures; Maldives | Choose the exact sailing: shoulder-season availability and conditions are not interchangeable across these destinations |
| July–August | Komodo; Maldives if wetter weather is acceptable | Master lists summer Komodo sailings; Emperor describes Maldives May–November as generally wetter and windier |
| September | A dated Komodo programme; Maldives | Compare the route and ports, not a country-wide “best season” label; Maldives remains in its usual southwest-monsoon period |
| October–December | Central Raja Ampat; advertised Similan programmes; Maldives | White Manta recommends Raja Ampat from October; The Junk advertises October starts; Maldives trends drier towards year end |
Maldives: year-round diving with a monsoon trade-off
Emperor Divers describes the Maldives as a year-round diving destination. Its FAQ places generally drier northeast-monsoon conditions in November–April and the wetter, windier southwest monsoon in May–November. The overlapping November labels are a reminder that a monsoon does not switch on a fixed holiday date.
If lower rainfall is the priority, start with the drier period. If your dates fall in July or August, the Maldives is not automatically ruled out, but accept a greater weather trade-off and compare the actual atolls and crossings. A dry-season label does not make channel dives easy or guarantee visibility. Use the regional guide before choosing the cabin.
Emperor Divers: Maldives seasonal FAQCentral Raja Ampat: an October–April planning window
White Manta recommends October–April for its Central Raja Ampat diving, citing less wind and rain. Its programme uses Sorong and covers areas around Waigeo, Batanta, the Fam islands and Dampier Strait. This makes it a useful candidate for northern-winter dates when you want that central route.
Do not transfer this advice unchanged to every Indonesian region or every crossing to Misool. White Manta describes currents from mild to strong even in its recommended season. Decide whether you want Central Raja Ampat or a broader north-and-south voyage, then inspect the matching dated programme and experience requirements.
White Manta: Central Raja AmpatSimilan and Surin: work within the advertised sailing season
The Junk advertises its six-night Similan and Surin programme as available October–May. That is useful for winter planning and a reason not to assume the same route runs through July and August. The programme covers named diving areas including Koh Bon, Koh Tachai and Richelieu Rock.
October and May are edge months in this advertised window. The operator’s broad month range is not an official park-opening notice and does not prove access on every date. Match a specific sailing to the current access rules before arranging flights, especially at either end of the season.
The Junk: six-night Similan and Surin programmeTubbataha: match a short programme window, not a general Philippines season
Master Liveaboards publishes Tubbataha departures across March, April, May and June. Use that as a programme window when choosing leave dates, not as proof that every vessel sails throughout all four months or that the park has identical dates every year. Its named itinerary requires Advanced Open Water or equivalent, at least 50 logged dives and comfort in currents.
For a spring trip, compare the actual boat and departure before buying international flights. A Philippines cruise outside that window may be a Visayas route rather than Tubbataha. Similar cruise lengths do not mean the same reefs or departure port.
Master Liveaboards: Tubbataha National Park programmeKomodo: a concrete summer alternative
Master’s published Komodo schedule includes seven-night July and August 2027 sailings, alongside longer June and September departures. That provides a specific summer alternative to Similan programmes without asserting a universal Komodo operating season. The list contains different departure-port labels, including Bima and Labuan Bajo; a generic destination heading is not enough to book the right airport.
The seven-night programme requires Advanced Open Water or equivalent and at least 50 logged dives, with strong-current experience recommended. Summer availability does not qualify an inexperienced diver for Komodo. Compare the dated sailing, exact embarkation and return ports, and your experience before committing.
Master Liveaboards: Komodo seven-night programmeWildlife months are a separate filter
If a particular animal is the reason for travelling, narrow the regional shortlist further. Nautilus describes humpback whales as seasonal Socorro visitors from January–April, and highlights November–December and late April–June for whale sharks. These are the operator’s seasonal observations, not sightings guarantees or permission to approach animals. Its Socorro programme also involves a roughly 24-hour crossing each way from Cabo San Lucas.
For a fixed week, first choose a programme that runs, then decide whether the crossing, dive conditions and wildlife chances justify it. For flexible dates, prioritise the desired region or animal before selecting the boat. Leave the detailed daily sequence to the actual departure conditions rather than treating this calendar as a forecast.
Nautilus: Socorro destination and wildlife seasons