Koh Bon

Koh Bon

Koh Bon

2 Dives / Lunch on MV Koon 9 - Full Day

5,400 THB / PERSON

Pay extra for national park entrance fee 300 THB for Thai people / 700 THB for Foreigner
Pay extra for Equipment rental full set 500 THB
Dive computer 300 THB/Day

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** This Trip Is For Certified / Licensed Divers Only **

If you are not a certified/licensed diver please go to this link

For your day trip, we take you out on a fast transfer speed boat. It takes about 1.30 hours to reach the dive site, where you will rendezvous with our spacious dive boat, the MV Koon 9.

After a warm welcome aboard and a thorough briefing, you will get ready for their first dive. We dive in small groups to give you the best possible service and experience.

After the first dive, you will return to the MV Koon 9 for a buffet lunch and a more relaxed and extended surface interval. During lunch, there is plenty of time to sunbathe on our sun deck and relax. If you're feeling hot, then take a cooling break in the air-conditioned lounge before the second dive.

After the day’s excitement, the speed boat is ready and waiting to take you back to the Pier, returning at approximately 17:00 for transfers back to your hotel or resort.

Koh Bon / Tachai

Koh Bon Ridge

Koh Bon Ridge is the dive site that stretches around the cape on the western corner of Koh Bon Island, which is not part of the Similan Archipelago although part of the same National Park administration. The stepping rocky ridge that can be seen out of the water continues all the way underwater, giving the name to the dive site. The underwater scenery at Koh Bon Ridge is absolutely unique, with an incredible amount and diversity of marine life. Koh Bon is also the hot spot for Mantas in Thailand! We usually start our dive near the bay at the south side of the ridge. Here the scenery is characterized by a straight wall that at 10-12 meters of depth changes into a sloping hard coral garden, the corals here are in pristine conditions. The area is teeming with thousands of reef fish including species that are not commonly found in other Thailand dive sites. Keep an eye towards the deep side as White Tips and Guitar Sharks are sometimes spotted there. We then move to the ridge, where the scenery changes drastically with large square rocks that get deeper and deeper, like giant steps. The rocks on Koh Bon Ridge are covered by small soft corals of different colors, offering a stunning visual impact. This part of the dive site is often subject to strong current, which on the plus side attracts lots of fairly sized pelagics like Trevally and Tunas. The ridge is also the spot where the oceanic Manta Rays tend to gather, as the whole area is a large cleaning station…keep an eye to the blue all the time! The ridge steps end at around 35 meters of depth, and at the bottom of it lies a “hidden gem” that not many divers know about, a glowing orange anemone (see photo). It is usually possible to get to the end of the Koh Bon Ridge only when the current is not too strong. We then go around to the north side of the ridge and proceed in that direction, here the bottom changes again into a sloping hard coral garden and small rocks. Keep an eye to the rocks as here is often possible to spot octopus (if not too camouflaged!) and Banded Sea Kraits


Diving insurance
Free transfer around Khaolak, Namkhem charge 500 THB/Pax
Extend Night 5000THB / Day
Nitrox 300THB / Tank, Divers 19 dives up free Nitrox 1tank/pax/day, Divelead free Nitrox 1tank/pax/day
15L air tank for rent 300THB/day
Price included Vat


Park fee
Equipment Rental
Free transfer around Khaolak, Namkhem (Phuket, Out of Khaolak, Namkhem charge 500THB/Pax)
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MV Koon 9 - Weekly Plan Day Trip

10:30 First Dive/ 14:00 Second Dive 

Dive 1
Dive 2
SundayRichelieu RockRichelieu Rock
MondaySurin IslandsSurin Islands
WednesdayKoh BonKoh Bon
ThursdaySimilan Island no.5-6Similan Island no.7
FridaySimilan Island no. 9Similan Island no. 9
SaturdayTachai PinnacleTachai Pinnacle
Boat Schedule - Richelieu Rock
SundayNot Available-
MondaySimilan Islands ( Lunch on the Similan Island No.4 )2 Dives
TuesdayNot Available-
WednesdayNot Available-
ThursdayNot Available-
FridaySimilan Islands ( Lunch on the Similan Island No.4 )2 Dives
SaturdayNot Available-



06.30 - 7:30

Pickup from hotels


The Seastar team welcomes you on board at Seastar Pier (Tub-lamu Pier) to check in. Serve you with hot drinks and a bakery.


Depart to MV Koon 9 by speedboat.


Arrive at our spacious boat, MV Koon 9. Dive No. 1 at Koh Bon (diving time: 50 minutes)


Enjoy a great lunch on MV Koon 9 and a relaxing time.


Dive No. 2 at Koh Bon (dive time: 50 minutes)


Depart from MV Koon 9 by speedboat


Arrive at Seastar Pier (Tub-lamu Pier).and transfer back to your hotel.

More Information

Phone: +6684-156-9514


Booking Day Trip: [email protected]
Booking Liveaboard: [email protected]




Pick up from hotels or meet at Sea Sky Travel Pier


Departure from Sea Sky Travel Pier by speed boat


Arrive at the dive site


First dive (Diving time 50 minutes)


Lunch Buffet at Surin Island and relaxing time


Leaving the Island


Second dive (Diving time 50 minutes)


Depart from Dive site


Arrive at the Sea Sky Travel Pier and transfer back to hotel

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