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Before reading any further, please note that this text refers only to the diving sites around Similans Islands #1 - #9 and not about the northern dive sites of Koh Bon & Koh Tachai, which although located in Mu Ko Similan National Marine Park are described on another page. The Similan Islands is world famous for its wonderful scuba diving that can be enjoyed by all levels of diver, from beginner to professional. There are more than twenty wonderful dive sites at the Similans, and all have their own name although some are referred to differently depending on who you speak to. The western side of this archipelago is exposed to the Indian Ocean and has been developing naturally for hundreds of thousands of years. Therefore, the topography of the underwater world has been shaped by stronger currents and waves from the monsoon winds. When diving on the western side, you will notice that there are lots of granite boulders, deep water, drop-offs, swimthroughs, and species which thrive in these conditions. Similan diving liveaboard boats do visit the western dive sites, but tend to focus on the eastern dive sites more. The eastern side of the Similan Islands is more colourful than the west, and easier to dive. This is mainly due to these dive sites being sheltered from the Indian Ocean by the islands themselves since ancient history. There are at least a dozen wonderful dive sites that have colourful corals, easy diving, and plenty of reef fish and invertebrates. Most dive sites on the east side have sloping reefs that can be enjoyed by scuba divers of all levels and at depths from ‘very shallow’ to 30m. In general, forgetting about the east/west contrast, you can also separate the Similans archipelago into three areas, which are south, central and north.

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Southern Similan Islands

Not so many dive boats visit the southern Similan Islands. The reasons for this are nothing to do with inferior diving, but mainly due to logistics and diversity. Due to the fact that there are fewer dive sites in the southern Similans, and that getting there takes a little longer, dive operators tend to skip this area. Also, the dive sites are more suitable for experienced divers more than for novices. This is a great shame, because there are some wonderful dive sites there. Boulder City and Sharkfin Reef are the most well-known, and those on boats which do visit this area will enjoy some really good diving.

Central Similan Islands

This area is extremely popular for both day trip and liveaboard diving boats to visit. The central Similan Islands has a wide range of dive sites on both the east and west sides, and it is very popular for the first ‘check’ dive of nearly all liveaboard trips’ itineraries. Around Islands 4, 5 & 6, each dive boat can easily find a place to let divers drop in and enjoy some fabulous diving. While dive sites such as Deep Six and Elephant Head Rock out on the west side are more for experienced divers, there are plenty of nice, colourful and easier dive sites around the east side of the central Similan Islands. These have colourful sloping reefs, lots of marine life and are perfect for Similan diving day trips, liveaboard diving ‘check dives,’ and for those who don’t want to worry about depth, fight a current or do a safety stop in open water with nothing to look at. Here at the central Similan Islands there is a perfect choice of great dive sites to suit all levels of diver, and if one of the dive sites is busy, it’s very easy to move to the next. Although Koh Bon, Koh Tachai & Richelieu Rock are more exciting, the central Similans is a perfect place to start a Thailand liveaboard trip.

Northern Similan Islands (#7, #8 & #9)

This text about the ‘Northern Similan Islands’ refers to Islands 7-9, and not Richelieu Rock, Koh Tachai & Koh Bon. Those dive sites are described on another page. The northern Similan Islands is the northernmost islands of the mini-archipelago of 8-9 islands known as ‘the regular Similans.’ Most of the photographs you will have seen of people on beaches at The Similans will have been taken here, because Donald Duck Bay is the place with a viewpoint up on the famous rock. Therefore, this area is very popular with dive boats (liveaboard & day trips) as well as snorkel trips. There are plenty of good dive sites here, most of which are located on the eastern side. These include North Point, Breakfast Bend and more.

The ‘regular Similan Islands’ is an area perfect for all levels of diver to experience safe and enjoyable diving cruises in Thailand, as well as day trips. There’s something for everyone, and the choice of alternatives is such that if conditions aren’t perfect or the planned dive site is crowded, a Plan B is nearly always available.

Filter: The Similans Similan Liveaboards
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Unbeatable Personal Service
Large & Spacious
Very Popular
Best Single-Supplement Rate For Solo Guests
Oktavia Liveaboard Boat

MV Oktavia is one of the most-established Similan Islands liveaboard diving boats on offer. She is nearly 30m long and has enough space for more than 30 guests but takes usually no more than 20 on each trip. Trips on MV Oktavia visit the best Similan diving sites as well as Richelieu Rock, Koh Bon, Koh Tachai, and Boonsung Wreck. Prices are extremely competitive for safe and comfortable diving trips, and there is a unique option of tour lengths. While the main vessel goes out to the diving sites for four or five days at a time, those wanting only to b

Type: Liveaboard
Dive Boat Departs from: Khao Lak
No. of Divers: 20
Liveaboard trips from: 14,300 THB per diver
8/10 Based on 10 diver reviews
Destinations Duration Standard Cabin Master Cabin
Similan Islands
(7 dives)
2D / 2N Standard Cabin 14,300 THB Master Cabin 18,300 THB
Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck
(10 dives)
3D / 2N Standard Cabin 21,500 THB Master Cabin 27,500 THB
Similan Islands, Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck
(15 dives)
4D / 4N Standard Cabin 23,900 THB Master Cabin 31,900 THB
Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck
(11 dives)
3D / 3D Standard Cabin 24,100 THB Master Cabin 30,100 THB
Similan Islands, Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck
(19 dives)
5D / 5N Standard Cabin 27,900 THB Master Cabin 37,900 THB
Free Nitrox fills for certified divers
Sails from Khao Lak
Twin & Single cabins
Max. 12 passengers
Air-Con
Genesis dive boat liveaboard boat
Special offers available

MY Genesis 1 is a steel-hull liveaboard vessel which offers a great balance of everything that is important to Similan divers. Run by a professional team and having a maximum of twelve diving guests on board, trips sell out very fast. Genesis alternates trips between the Similan Islands and Richelieu Rock, Koh Bon & Koh Tachai. 10 dives over three fabulous days and two nights at prices starting within most people’s budget make diving on this boat very enjoyable. Nitrox-certified divers can enjoy free fill throughout the cruise.

Type: Liveaboard
Dive Boat Departs from: Khao Lak
No. of Divers: 12
Liveaboard trips from: 18,900 THB per diver
9/10 Based on 2 diver reviews
Destinations Duration Twin Cabin Single Cabin
Similan Islands, Boonsung Wreck
(10 dives)
3D / 2N Twin Cabin 18,900 THB Single Cabin 23,000 THB
Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck
(10 dives)
3D / 2N Twin Cabin 19,900 THB Single Cabin 24,000 THB
Similan Islands, Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck
(20 dives)
6D / 5N Twin Cabin 36,500 THB Single Cabin 45,000 THB
10% off of remaining spaces for October departures
Brand New 2017
Friendly & Professional
Flexible Schedule
Great Reputation
Nemo 1 Similan Islands Dive boat
Special offers available

The brand-new MV Nemo 1 is one the most professionally-run liveaboard boats that cruises the Similan Islands, and has flexible tours that can fit almost anyone’s schedule. In addition, the prices are extremely competitive. Divers can stay for two days & one night or as long as they like, enjoying up to four dives per day at Thailand’s best dive sites.

The boat’s sleeping capacity is just 20 guests in air-conditioned cabins which have double beds or four bunks. Morning departures by speedboat enable guests to reach the main boat in ju

Type: Liveaboard
Dive Boat Departs from: Khao Lak
No. of Divers: 20
Liveaboard trips from: 11,400 THB per diver
9/10 Based on 14 diver reviews
Destinations Duration 4 Bed Cabin Double Bed Cabin
Similan Islands
(6 dives)
2D / 1N 4 Bed Cabin 11,400 THB Double Bed Cabin 11,900 THB
Koh Bon, Koh Tachai
(6 dives)
2D / 1N 4 Bed Cabin 11,600 THB Double Bed Cabin 12,100 THB
Similan Islands, Koh Bon
(6 dives)
2D / 1N 4 Bed Cabin 11,600 THB Double Bed Cabin 12,100 THB
Koh Tachai, Similan Islands
(6 dives)
2D / 1N 4 Bed Cabin 11,600 THB Double Bed Cabin 12,100 THB
Similan Islands
(10 dives)
3D / 2N 4 Bed Cabin 14,800 THB Double Bed Cabin 15,800 THB
Similan Islands, Koh Bon, Koh Tachai
(10 dives)
3D / 2N 4 Bed Cabin 15,000 THB Double Bed Cabin 16,000 THB
Koh Tachai, Similan Islands
(10 dives)
3D / 2N 4 Bed Cabin 15,000 THB Double Bed Cabin 16,000 THB
Similan Islands, Koh Bon
(10 dives)
3D / 2N 4 Bed Cabin 15,000 THB Double Bed Cabin 16,000 THB
Koh Bon, Koh Tachai, Similan Islands
(10 dives)
3D / 2N 4 Bed Cabin 15,000 THB Double Bed Cabin 16,000 THB
Similan Islands
(14 dives)
4D / 3N 4 Bed Cabin 18,100 THB Double Bed Cabin 19,600 THB
Similan Islands, Koh Bon
(14 dives)
4D / 3N 4 Bed Cabin 18,300 THB Double Bed Cabin 19,800 THB
Similan Islands, Koh Bon, Koh Tachai, Similan Islands
(14 dives)
4D / 3N 4 Bed Cabin 18,300 THB Double Bed Cabin 19,800 THB
Koh Tachai, Similan Islands
(14 dives)
4D / 3N 4 Bed Cabin 18,300 THB Double Bed Cabin 19,800 THB
Similan Islands, Koh Bon, Koh Tachai
(14 dives)
4D / 3N 4 Bed Cabin 18,300 THB Double Bed Cabin 19,800 THB
Koh Bon, Koh Tachai, Similan Islands
(14 dives)
4D / 3N 4 Bed Cabin 18,300 THB Double Bed Cabin 19,800 THB
20% off of October departures
20% off of departures after April 15th
Excellent Value
3, 4 & 7 days cruises
Experienced Management
On-board BBQ parties
MV Andaman liveaboard
Special offers available

MV Andaman is a 26m steel-hulled liveaboard diving boat which offers excellent value and a great variety of cruise lengths to choose from. With all of her cabins air-conditioned and plenty of space to move around and relax, there is very little to beat MV Andaman for comfort at this price. There are 3D/3D, 4D/4N & 7D/7N trips available, and she alternates between the Similan Islands and those exciting dive sites to the north, such as Richelieu Rock and Koh Tachai. 

Type: Liveaboard
Dive Boat Departs from: Khao Lak
No. of Divers: 20
Liveaboard trips from: 14,040 THB per diver
9/10 Based on 9 diver reviews
Destinations Duration 6 Bed Cabin Double Cabin Double En Suite Cabin
Koh Tachai, Richelieu Rock, Koh Surin
(9 dives)
3D / 3N 6 Bed Cabin 14,040 THB Double Cabin 15,690 THB Double En Suite Cabin 16,065 THB
Similan Islands, Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck
(13 dives)
4D / 4N 6 Bed Cabin 17,640 THB Double Cabin 19,440 THB Double En Suite Cabin 20,340 THB
Similan Islands, Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck, Koh Surin
(22 dives)
7D / 7N 6 Bed Cabin 26,928 THB Double Cabin 30,078 THB Double En Suite Cabin 31,653 THB
Andaman Special Offers Coming Up
20% off remaining spaces
Similan Islands, Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck
(13 dives)
Departs: 21 Oct 2017
Returns: 25 Oct 2017
4D / 4N 6 Bed Cabin
Special offer
17,640 THB
14,112 THB
Double Cabin
Special offer
19,440 THB
15,552 THB
Double En Suite Cabin
Special offer
20,340 THB
16,272 THB
20% off remaining spaces
Similan Islands, Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck
(13 dives)
Departs: 28 Oct 2017
Returns: 01 Nov 2017
4D / 4N 6 Bed Cabin
Special offer
17,640 THB
14,112 THB
Double Cabin
Special offer
19,440 THB
15,552 THB
Double En Suite Cabin
Special offer
20,340 THB
16,272 THB
20% off remaining spaces
Similan Islands, Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck, Koh Surin
(22 dives)
Departs: 08 Apr 2018
Returns: 15 Apr 2018
7D / 7N 6 Bed Cabin
Special offer
26,928 THB
21,542 THB
Double Cabin
Special offer
30,078 THB
24,062 THB
Double En Suite Cabin
Special offer
31,653 THB
26,122 THB
20% off remaining spaces
Similan Islands, Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck, Koh Surin
(22 dives)
Departs: 12 Apr 2018
Returns: 19 Apr 2018
7D / 7N 6 Bed Cabin
Special offer
26,928 THB
21,542 THB
Double Cabin
Special offer
30,078 THB
24,062 THB
Double En Suite Cabin
Special offer
31,653 THB
26,122 THB
20% off remaining spaces
Similan Islands, Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck
(13 dives)
Departs: 15 Apr 2018
Returns: 19 Apr 2018
4D / 4N 6 Bed Cabin
Special offer
17,640 THB
14,112 THB
Double Cabin
Special offer
19,440 THB
15,552 THB
Double En Suite Cabin
Special offer
20,340 THB
16,272 THB
20% off remaining spaces
Similan Islands, Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck
(13 dives)
Departs: 20 Apr 2018
Returns: 24 Apr 2018
4D / 4N 6 Bed Cabin
Special offer
17,640 THB
14,112 THB
Double Cabin
Special offer
19,440 THB
15,552 THB
Double En Suite Cabin
Special offer
20,340 THB
16,272 THB
20% off remaining spaces
Similan Islands, Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck, Koh Surin
(22 dives)
Departs: 20 Apr 2018
Returns: 27 Apr 2018
7D / 7N 6 Bed Cabin
Special offer
26,928 THB
21,542 THB
Double Cabin
Special offer
30,078 THB
24,062 THB
Double En Suite Cabin
Special offer
31,653 THB
26,122 THB
20% off remaining spaces
Koh Tachai, Richelieu Rock, Koh Surin
(9 dives)
Departs: 24 Apr 2018
Returns: 27 Apr 2018
3D / 3N 6 Bed Cabin
Special offer
14,040 THB
11,232 THB
Double Cabin
Special offer
15,690 THB
12,552 THB
Double En Suite Cabin
Special offer
16,065 THB
12,852 THB
20% off remaining spaces
Similan Islands, Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck, Koh Surin
(22 dives)
Departs: 24 Apr 2018
Returns: 01 May 2018
7D / 7N 6 Bed Cabin
Special offer
26,928 THB
21,542 THB
Double Cabin
Special offer
30,078 THB
24,062 THB
Double En Suite Cabin
Special offer
31,653 THB
26,122 THB
20% off remaining spaces
Similan Islands, Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck
(13 dives)
Departs: 27 Apr 2018
Returns: 01 May 2018
4D / 4N 6 Bed Cabin
Special offer
17,640 THB
14,112 THB
Double Cabin
Special offer
19,440 THB
15,552 THB
Double En Suite Cabin
Special offer
20,340 THB
16,272 THB
20% off remaining spaces
Similan Islands, Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck
(13 dives)
Departs: 02 May 2018
Returns: 06 May 2018
4D / 4N 6 Bed Cabin
Special offer
17,640 THB
14,112 THB
Double Cabin
Special offer
19,440 THB
15,552 THB
Double En Suite Cabin
Special offer
20,340 THB
16,272 THB
20% off remaining spaces
Similan Islands, Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck, Koh Surin
(22 dives)
Departs: 02 May 2018
Returns: 09 May 2018
7D / 7N 6 Bed Cabin
Special offer
26,928 THB
21,542 THB
Double Cabin
Special offer
30,078 THB
24,062 THB
Double En Suite Cabin
Special offer
31,653 THB
26,122 THB
20% off remaining spaces
Koh Tachai, Richelieu Rock, Koh Surin
(9 dives)
Departs: 06 May 2018
Returns: 09 May 2018
3D / 3N 6 Bed Cabin
Special offer
14,040 THB
11,232 THB
Double Cabin
Special offer
15,690 THB
12,552 THB
Double En Suite Cabin
Special offer
16,065 THB
12,852 THB
20% off remaining spaces
Similan Islands, Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck, Koh Surin
(22 dives)
Departs: 06 May 2018
Returns: 13 May 2018
7D / 7N 6 Bed Cabin
Special offer
26,928 THB
21,542 THB
Double Cabin
Special offer
30,078 THB
24,062 THB
Double En Suite Cabin
Special offer
31,653 THB
26,122 THB
20% off remaining spaces
Similan Islands, Koh Bon, Koh Tachai, Richelieu Rock, Boonsung Wreck
(13 dives)
Departs: 09 May 2018
Returns: 13 May 2018
4D / 4N 6 Bed Cabin
Special offer
17,640 THB
14,112 THB
Double Cabin
Special offer
19,440 THB
15,552 THB
Double En Suite Cabin
Special offer
20,340 THB
16,272 THB
Back-to-Basics
Fantastic Value
Maximum 8 divers
The Original Liveaboard
Nangnuan Budget liveaboard dive boat

Nangnuan is a liveaboard diving boat like no other. She is small, classic, and offers personal service to just eight guests per trip. Diving at the Similan Islands and at Koh Bon should be a quiet and relaxing experience and that’s just what Nangnuan offers. There’s no generator making a noise and everyone sleeps outside on the covered top deck. She is the perfect diving liveaboard boat for those on a budget or who want to do things a bit more naturally than on a luxury ship. In addition, the prices are the lowest. 

Type: Liveaboard
Dive Boat Departs from: Khao Lak
No. of Divers: 8
Liveaboard trips from: 9,810 THB per diver
8/10 Based on 2 diver reviews
Destinations Duration Per diver
Similan Islands, Koh Bon
(9 dives)
3D / 2N Per diver 9,810 THB
Fastest Journey Times
17 divers
Snorkellers & Children Welcome
Best-value Richelieu Rock trips
Blue Dolphin daytrip dive boat

The Blue Dolphin is a fast, smooth & comfortable speedboat that offers diving day trips at. Blue Dolphin is usually the first boat back from Similan & Richelieu Rock day trips. Great service, rganisation & prices.

Type: Day trip
Dive Boat Departs from: Khao Lak
No. of Divers: 17
Day trips from: 4,600 THB per diver
10/10 Based on 1 diver reviews
Destinations Duration Per diver
Similan Islands
(2 dives)
1D Per diver 4,600 THB
Koh Bon
(2 dives)
1D Per diver 4,600 THB
Koh Bon, Koh Tachai
(2 dives)
1D Per diver 4,800 THB
Richelieu Rock
(2 dives)
1D Per diver 5,000 THB
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