Triggerfish with diver

Koh Bon Tachai diving day trip

Get the most out of your Khao Lak diving experience by joining a Koh Bon/ Tachai diving day trip or a trip to the Similan Islands or Richelieu rock with 2 dives in the crystal waters of the Andaman Sea.

Koh Bon is a remote small uninhabited island which belongs to the Similan Islands National Marine Park. It’s located about 20 kilometers north of Similan Island No 9. The island has the shape of a horseshoe and no beaches. It is made of volcanic rock and over time waves and currents have cut some holes right through the island where you can see the waves surge through them both above and below the surface.

Koh Bon

Around Koh Bon, there are a few different dive sites what also give you different types of diving (Wall, Slope, Reef, and Drift) and it is considered the number 1 place in Thailand to see Manta Rays.

The West Ridge is the favorite amongst most divers and located at the southwest corner of the island. The southern part is a step-down wall that falls down to 40+ meters and is covered in tiny colorful soft corals and beautiful sea fans of different sizes, shapes, and colors.

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    • Diving day trip from Khao Lak
    • 2 Dives
    • Similan islands, Koh Bon, Koh Tachai, Richelieu rock
    • Max 4 divers with 1 professional guide
    • Lunch on the boat
    • Best price guarantee
    • Book with local diving experts



Pick up from your accommodation in Khao Lak.
At 8.00 AM the fast and spacious speedboat leaves to the dive site from Baan Nahmkem pier. The travel time is around one and a halve hour.

The friendly and experienced crew welcome you onboard on the comfortable dive boat. The boat master gives a short boat briefing.

Dive groups

Dive groups are based on certification level and dive experience. In this way everybody will feel themselves comfortable: from novice open water diver to the more experienced diver. The ratio is 4 divers to 1 Dive Master. Each Dive Master gives a detailed dive briefing to his group and helps you with setting up your diving gear.
Plunge into the crystal clear water and enjoy the incredible marine wildlife. Dive time 45-60 minutes.

Surface interval

Back onboard a lunch is served . During the surface interval there is to relax or to sunbathe on the sundeck.

Time for the second dive, your Dive Master gives a detailed dive briefing and will help you with gearing up.
Plunge back into the water and get the experience of world-class diving.

After the last dive fresh fruit are served. The boat starts returning back to Baan Nahmkhem pier. This will give you enough time to fill in your logbook, exchange experiences and have a drink The arrival time is around 17.00 PM . A taxi is waiting to bring you back to your accommodation in Khao Lak.

On the 3 dives trip the arrival time is about two hours later

Schedule can be changed due weather, sea conditions, instructions by the national park authorities.


Monday   Similan island #4+5 Divers & Snorkelers
2 Dives          
Tuesday   Similan Island #9 Divers & Snorkelers
2 Dives          
Wednesday Koh Bon  Divers only
3 Dives          
Thursday   Richelieu rock Divers only
2 dives          
Friday   Similan islands 7   Divers & Snorkelers
2 Dives          
Saturday   Koh Tachai   Divers only
2 Dives          
Sunday   Richelieu rock     Divers only
2 Dives          




Similan islands day trip 2 dives : 5.000.- Baht

Koh Bon day trip 2 dives : 5.000.- Baht

Koh Tachai day trip 2 dives : 5.000.- Baht

Richelieu rock day trip : 5.300.- Baht

Similan islands daytrip : 3.200.- Baht

Included in the price are :

  • Experienced dive guides and instructors
  • Small dive groups of 4  divers to 1 dive guide
  • Lunch, fruits and snacks
  • Drinking water, tea and coffee
  • Towels
  • 12 Liter tanks
  • Weightbelt
  • Transfers for Khao Lak area

Excluded in the price are :

  • Divers: National park entrance and diving fees : 700.- Baht
  • Snorkelers: National park fees: 500.- Baht
  • Snorkelers child: 300.- Baht
  • Full set of diving equipment : 500.- Baht per day
  • 15 Liter tank : 200.- Baht per dive
  • Nitrox 32 % 12 Liter tank : Free
  • Dive computer : 250.- Baht per day