Best Similan Islands Liveaboards 2026: Top Boats
Granite boulders at Donald Duck Bay, Similan Islands, Phang Nga.
For comfort, shortlist The Junk and Diva Andaman from Phuket, or the Manta Queen fleet, MV Pawara and Giamani from Khao Lak. Choose a 4–5 night route that adds Koh Bon, Koh Tachai (when open) and Richelieu Rock, and travel between mid-October and mid-May, when the Similan marine park is open.
The Similan Islands are Thailand’s most celebrated dive destination: granite boulders the size of houses, swim-throughs, soft corals and, with luck, manta rays at Koh Bon or a whale shark at Richelieu Rock. Day trips are possible, but the best dives happen early in the morning and at sites too far from the mainland for a day boat. That is where a liveaboard comes in.
This guide focuses on Similan liveaboards specifically for certified divers who are staying in a Phuket or Khao Lak resort and want a comfortable three- to five-night trip with private cabins and good food, rather than the cheapest bunk. If you prefer to sleep on land, read our best luxury dive resorts for the Similan Islands instead.
Similan Liveaboard Season and Park Rules
Mu Ko Similan National Park opens for the dry season, typically from mid-October to mid-May, and closes during the southwest monsoon to protect reefs and visitors. Exact opening and closing dates are announced by Thailand’s Department of National Parks, so confirm them with your operator or on the DNP website before booking flights.
- Daily visitor and diver numbers are capped, so liveaboard spaces are limited and peak dates fill early.
- National park fees are usually charged on top of the trip price; check whether they are included.
- Some sites may be closed seasonally or long term for reef recovery. Operators adjust itineraries accordingly.
- Reef-safe sunscreen and strict no-touch rules apply throughout the park.
The Best Similan Liveaboards to Shortlist
The boats below are consistently popular with comfort-minded divers. Cabin types, routes and amenities change from season to season, so always check the current specifications with the operator.
1. The Junk (Phuket)
A traditional Chinese-junk-style vessel with wooden decks and a strong sense of character. It suits divers who want atmosphere as much as amenities, and it runs Similan and Richelieu Rock itineraries from Phuket. Ask about cabins with private bathrooms if that matters to you.
2. Diva Andaman (Phuket)
A large sailing yacht that combines diving with a more yacht-like experience, including spacious deck areas. A good fit for couples where one partner dives more than the other, as there is more room to relax between dives.
3. Manta Queen Fleet (Khao Lak)
A long-running Khao Lak operation with several boats at different comfort levels. Departing from the Khao Lak side shortens the crossing to the Similans, giving you more time underwater. Choose the higher-spec boats in the fleet for private cabins.
4. MV Pawara (Khao Lak)
A purpose-built dive boat known for practical deck layouts and an efficient diving routine. Good for divers who want to maximise dive count without sacrificing basic comfort.
5. Giamani (Khao Lak)
A smaller wooden boat with a relaxed atmosphere and limited guest numbers. Ideal if you prefer a quieter group and personal attention from guides.
Comparison: Phuket vs Khao Lak Departures
| Boat | Departs from | Typical trip length | Best for |
|---|---|---|---|
| The Junk | Phuket | 4–5 nights | Character and classic routes |
| Diva Andaman | Phuket | 4–5 nights | Couples and mixed diver/non-diver groups |
| Manta Queen fleet | Khao Lak | 3–5 nights | Choice of comfort levels, short crossing |
| MV Pawara | Khao Lak | 3–4 nights | Efficient diving, good value for comfort |
| Giamani | Khao Lak | 3–4 nights | Small groups, relaxed pace |
Phuket departures are convenient if you are staying in Phuket or flying in the same day, but the crossing is longer. Khao Lak departures (usually from Thap Lamu Pier) reach the park faster and suit travellers already staying in Khao Lak resorts.
Dive Sites You Should Expect to See
- Elephant Head Rock: dramatic boulders and swim-throughs; currents can be strong.
- East of Eden and Deep Six: soft corals, reef fish and classic Similan topography.
- Christmas Point: arches and swim-throughs; great for wide-angle photography.
- Koh Bon: a ridge known for manta ray sightings, especially later in the season.
- Koh Tachai: a pinnacle with big-fish potential, subject to park opening rules.
- Richelieu Rock: in the neighbouring Surin park; famous for macro life and occasional whale sharks.
Routes that include Richelieu Rock also pass close to the Surin Islands. See our Similan vs Surin comparison to understand the difference between the two parks.
A Typical Day on Board
Liveaboard life follows a simple rhythm built around the dives. Knowing what to expect helps you decide whether a three-night or five-night trip suits you.
- Early morning: a wake-up call around sunrise, coffee and a light snack, then the first dive while the water is calm and the sites are quiet.
- Mid-morning: a full breakfast, a short rest and the second dive at a different site.
- Afternoon: lunch, a nap or time on the sun deck, then the third dive.
- Evening: a sunset or night dive on many itineraries, followed by dinner, a briefing for the next day and early nights.
Most comfort-oriented boats serve a mix of Thai and Western dishes and can handle common dietary requirements with notice. Tell the operator about allergies or vegetarian and halal needs when you book, not when you board. Expect three to four dives a day; you can always skip one to rest.
What to Pack
- Certification card, logbook and dive insurance details.
- A dive computer (rentals may be limited) and a surface marker buoy.
- A 3mm wetsuit or skin suit — water is warm, but repeated dives can be chilly.
- Reef-safe sunscreen, a hat and a light jacket for evening crossings.
- Motion-sickness tablets and any personal medication.
- Cash for crew tips and onboard extras.
Planning where to stay before and after the trip? Our where to stay in Khao Lak guide compares the beaches closest to Thap Lamu Pier.
How to Choose the Right Trip
- Experience level: most Similan sites suit Open Water divers, but some have currents and depth; Advanced certification and recent dives help you enjoy the full itinerary.
- Trip length: three nights covers the Similans; four to five nights usually adds Koh Bon, Koh Tachai and Richelieu Rock.
- Cabin type: request a private cabin with en-suite bathroom and air-conditioning if comfort matters.
- Nitrox: many boats offer it, which is useful for four dives a day.
- Group size: smaller groups mean more flexibility and quieter dive sites.
Responsible diving matters here. The Similans have been closed and restricted in the past to let reefs recover from coral bleaching and heavy visitor pressure. Choose an operator that keeps group sizes small, gives thorough briefings on buoyancy and no-touch rules, and does not feed or chase marine life. Good operators also brief you on currents at sites such as Elephant Head Rock and Koh Bon, where conditions can change quickly. If your buoyancy is rusty, a refresher dive at your resort before boarding is time well spent and makes the whole trip more enjoyable — for you and the reef.
When to Book and What It Costs
Peak months — roughly December to April — sell out first, particularly over Christmas, New Year and Easter. Book three to six months ahead for higher-spec cabins. Prices vary by boat, cabin and trip length, and national park fees, equipment rental and Nitrox are often extra. Ask for a full cost breakdown before paying a deposit.
For manta rays, many divers favour the second half of the season, roughly February to April, though sightings are never guaranteed. Early season (late October to November) can offer quieter boats and good value.
Combining a Liveaboard With a Luxury Stay
The most comfortable way to do the Similans is to bookend your liveaboard with resort nights. Spend two nights in Khao Lak or Phuket before boarding to recover from jet lag, then two or three nights after the trip to respect no-fly guidelines (commonly at least 18–24 hours after your last dive) and relax. Ask your resort to store extra luggage while you are at sea.
If you want to go further, the remote Mergui Archipelago liveaboards offer a wilder alternative, while our best time to scuba dive in Southeast Asia helps you plan the rest of the year.
Key Takeaways
- The Similan park is usually open from mid-October to mid-May; check official dates each year.
- Choose four to five nights to include Koh Bon, Koh Tachai (when open) and Richelieu Rock.
- Khao Lak departures have shorter crossings; Phuket departures are more convenient for flights.
- Book private, en-suite cabins three to six months ahead for peak dates.
- Confirm what is included: park fees, Nitrox and equipment are often extra.
Check Hotel Prices and Availability
Rates in Similan Islands Liveaboards move a lot with season and holidays, so it is worth comparing live prices before you lock in dates.
See hotels in Similan Islands Liveaboards on Booking.com
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Frequently Asked Questions
When is the best time for a Similan liveaboard?
The park is usually open from mid-October to mid-May. December to April offers the most settled conditions, and February to April is popular for manta ray sightings.
Do I need Advanced certification for a Similan liveaboard?
Many sites suit Open Water divers, but some have depth and current. Advanced certification and recent diving experience will help you get the most from the itinerary; check each operator’s requirements.
Is Richelieu Rock part of the Similan Islands?
No. Richelieu Rock is in the neighbouring Mu Ko Surin National Park, but many four- and five-night Similan liveaboards include it.
Can non-divers join a Similan liveaboard?
Some boats accept non-divers at a reduced rate, though there is limited to do between dives. Sailing-yacht style boats with more deck space are better suited to mixed groups.
Are national park fees included in liveaboard prices?
Often not. Park fees are commonly paid separately, along with Nitrox and equipment rental. Ask for a full cost breakdown before booking.
Final Thoughts
A Similan liveaboard is the best way to experience the park’s top sites at their quietest times of day. Pick the departure point that suits your hotel, choose a four- to five-night route for the full experience, and secure a comfortable cabin early in the season.
For background on the park’s geography, see the Similan Islands page on Wikipedia, and check current dive-safety guidance from DAN before you travel.
Hero image: "Donald Duck Bay, Similan Island -8" by No Troubles Just Bubbles, CC BY-SA 4.0, via Wikimedia Commons. Rates, schedules and seasonal closures change; confirm details directly with operators before booking.
About the Author
This guide was researched by the LuxStay editorial team — curating luxury island and Southeast Asia stays, updated regularly with on-the-ground verification.