Koh Tao Liveaboard: Options, Alternatives & When to Go

Featured image: Hanumanix at English Wikipedia, Public domain, via Wikimedia Commons.

Is there a Koh Tao liveaboard?

Not in the way the Andaman Sea has them. Koh Tao dive centers run day trips, with sites usually announced the evening before. About 70 dive centers operate here, mostly along Walking Street in Sairee, in Mae Haad, or at Chalok Bay. Every boat returns to a bed on land. Overnight dive cruises in Thailand sail from Phuket and Khao Lak instead. Our search turned up no liveaboard departing from Koh Tao, so ask your dive center directly if you have heard otherwise. For the full island picture, start with our Koh Tao diving guide. Daily-boat stays are covered in our dive resort breakdown.

Liveaboard vs Koh Tao diving: which fits you?

Three formats compete for your dive days. Koh Tao day boats suit courses and relaxed fun diving. A Sail Rock full-day trip adds a 1.5-hour crossing and a pinnacle. Andaman liveaboards trade land time for volume, with up to 24 dives on a 7-night Thailand Aggressor charter. Use the table to match format to trip. For the marine-life row, our Koh Tao marine life guide shows what the island itself offers.

Which option fits by diver level and trip length

Pick by experience first, then by days available. Several Andaman boats accept Open Water divers with no logged dives. Others ask for 10 logged dives, or Advanced Open Water plus 4 logged dives. Our rule of thumb follows.

• New divers with 2 to 3 days on the island: stay on Koh Tao day boats and take a course.
• Open Water divers with one week: add one Sail Rock day at 3,200 THB or 3,900 THB.
• Open Water divers with 10 logged dives and 4 to 10 days: look at an Andaman liveaboard.
• Advanced divers with a flexible calendar: pair a November-to-April cruise with May-to-August Koh Tao diving.

Sail Rock and other long day trips: the closest alternative

Sail Rock is the nearest thing to a liveaboard day from Koh Tao. Boats need about 1.5 hours to reach it, so trips fill most of the day. This submerged pinnacle rises from 40 m (131 ft) to roughly 10 m (33 ft) below the surface. Divers swim through a chimney and meet barracuda schools, giant groupers and sometimes a whale shark. For target species, see our whale shark guide. Maximum depth is 40 m, so these trips suit divers who are comfortable at depth.

Prices and hours checked November 2026. At The Divers Boat, a day boat for certified divers only, Double Sail Rock costs 3,200 THB. That trip is two dives, 11:00 to 18:00, on Tuesday, Thursday, Friday and Sunday. Its Ultimate 3S costs 3,900 THB for three dives at Southwest Pinnacle, Sail Rock and Shark Island, on Monday, Wednesday and Saturday. Both prices include guide, equipment, a meal and insurance. A Nitrox specialty adds 5,500 THB, and the 3S plus Nitrox bundle is 9,900 THB.

Other long-boat sites add variety. Chumphon Pinnacle runs 12 to 35 m, and Southwest Pinnacle, about 10 km from the island, runs 5 to 30 m. HTMS Sattakut lies at 20 to 30 m, so you need Advanced Open Water for it. Open Water is the entry level, and SSI's Open Water course is one way to earn it. Night dives at White Rock, Green Rock and Red Rock stand in for a liveaboard's night dives. Our night dive guide has the detail.

Andaman Sea liveaboards for Koh Tao divers

Thailand's liveaboards concentrate on the west coast, in the Andaman Sea. Itineraries run 4 to 10 days. North trips cover the Similan Islands, Koh Bon, Koh Tachai, the Surin Islands and Richelieu Rock. South trips visit Phuket, Phi Phi, Koh Haa and Hin Daeng, with leopard sharks possible. Richelieu Rock sits several hours from land, which is why a boat beats a day trip there.

Most boats leave from Khao Lak or Phuket. The Thailand Aggressor's two piers sit 1 to 1.5 hours from Phuket airport (HKT). Water averages 26 to 29°C, and that operator recommends a 3 mm wetsuit. Boat styles range from a wooden junk to modern mid-range vessels and a luxury ship with a jacuzzi. Entry requirements differ by boat. Park access and seasonal closures are listed by Thailand's national parks authority.

• Marco Polo, Bavaria and Thailand Aggressor: Open Water, no minimum logged dives.
• Thailand Master and The Junk: Open Water plus 10 logged dives.
• Similan Explorer: Advanced Open Water plus 4 logged dives.

How to pair Koh Tao with a Thailand liveaboard trip

Season order makes pairing easy. Andaman boats run about November to April, while Koh Tao's best diving falls between May and August. A cruise in March or April followed by Koh Tao in May fits both windows.

From Phuket, the cheapest route to Koh Tao is a Lomprayah ferry and bus combination, which usually means an overnight leg. Flying to Chumphon, Koh Samui or Surat Thani and then taking a ferry is faster and costs more. Every ferry lands at Mae Haad pier, where a 20 THB fee applies. Taxis to Sairee or Chalok Bay run about 300 THB, so ask your dive center about a transfer. Leave a buffer day before any flight, and follow Divers Alert Network guidance on flying after diving.

Liveaboard costs and what is included

Liveaboards bundle cabin, meals and dives, so compare cost per dive. On a Sail Rock day, 3,200 THB for two dives works out to 1,600 THB a dive. The 3,900 THB trip with three dives comes to 1,300 THB a dive. Liveaboard fares are quoted per trip and move with season, cabin type and boat class. Price in the extras: park fees, nitrox, rental gear and transfers. Some boats include free nitrox, which offsets that line. Compare current rates from two or three operators before you commit. Our Koh Tao dive price guide covers island rates.

Best time for a Thailand liveaboard and Koh Tao

Andaman liveaboard season runs about November to April. Calm seas come with visibility of 25 to 30 m (82 to 98 ft). Whale sharks appear from February to April, and mantas follow the plankton. Outside those months many remote sites become unreachable.

Koh Tao can be dived all year in water near 29°C, with May to August the best window. June is the exception, with rougher crossings and softer visibility. Our guide to the Best Time to Dive Koh Tao: Month-by-Month Guide goes month by month. Temperatures are in our water temperature guide. Before booking crossings, read forecasts from the Thai Meteorological Department.

Mistakes to avoid when planning

Most errors come from mixing the two coasts. Three recur.

• Booking an Andaman liveaboard outside November to April and finding few boats running.
• Assuming an overnight dive boat leaves from Mae Haad pier.
• Comparing a day-trip price with a multi-night price without working out cost per dive.

Safety, certification and who should skip a liveaboard

Remote sites sit hours from land, so know where help is. Our hyperbaric chamber guide explains treatment access on the island. Newly certified divers on a short stay should skip the liveaboard and build experience on Koh Tao day boats. Tight budgets and seasickness-prone travelers are better served by the 3,200 THB Sail Rock day. A liveaboard rewards divers with 10 or more logged dives who want Richelieu Rock or the Similan Islands. If you are still deciding, read whether Koh Tao suits your level. Then go back to our island diving overview to plan your days.