Similan Islands – Koh Bon – Koh Tachai – Richelieu Rock

Diving day trips to the Similan Islands and Richelieu Rock

These fantastic day trips are a great alternative for divers who don’t have time for a liveaboard trip but still want to dive the Similan Islands and north Andaman’s famous dive sites. Going by speedboat allows you to reach the best dive sites in only 1 hour which means these day trips are much shorter than others. You get to dive the best locations whilst saving valuable time on your holiday. For the dive addict, day trips can be combined into multi day packages. The well organized day trips depart daily to the Similan Islands, Koh Bon, Koh Tachai, and Richelieu Rock.

Day Trip Diving Weekly Schedule


Day Trip Diving Price List

Similan Islands: 5,700 THB
Koh Bon: 5,700 THB
Koh Tachai & Koh Bon: 5,900 THB
Richelieu Rock: 6,100 THB

*All day trips include 2 dives

Price is all inclusive. Includes 2 dives, full set of quality dive equipment, Divemaster (max 4 divers per group), national park fee’s, Khao Lak hotel transfers, lunch, tea/coffee and snacks at private pier before and after departure.

Rental Equipment Extras

Enriched Air Nitrox (2 Tanks): 300 THB
Dive Computer (Per Day): 250 THB
Underwater Torch (Per Day): 150 THB
Underwater Camera (Inc CD): 1000 THB

Diving Day Trip Packages

3 Day Trips – 6 Dives: 16,300 THB
4 Day Trips – 8 Dives: 21,400 THB
5 Day Trips – 10 Dives: 25,500 THB

Combine any day trip into a multi day diving package. Days do not have to be consecutive. Diving packages are fully inclusive and you can choose from any day trip including Richelieu Rock.

When can I go?

The Similan and Surin islands national parks are open to divers from the middle of October to to the middle of May. These day trips operate from November to April.


Diving takes place in the Similan islands national marine park (Similan islands, Koh Bon, Koh Tachai), and Surin national marine park (Richelieu Rock). The day trips depart from Khao Lak so you need to be based there while taking the trips. Khao Lak is the main departure point for the Similan Islands, Phuket airport is a 1 hour taxi ride. Khao Lak is a small resort town in Phang Nga province with great beaches and a wide range of budget and luxury accommodation options.

Dive Sites

By using the super-fast Blue Dolphin speedboat, all of the areas best dive sites are accessible on short day trips. The top dive sites are Koh Bon, Koh Tachai and the world famous Richelieu Rock. Here you have a good chance of seeing larger marine life such as manta rays, sharks and whalesharks. The Similan islands have around 20 dive sites to choose from, dive sites at the Similan islands are selected after taking into consideration sea conditions and boat traffic.

Check our dive site map and mini guide for more details of all the dive sites.

Why pick this day trip?

This is by far the best choice for diving day trips in Khao Lak. Going by speedboat saves you a lot of time, the speedboat departs at 9am from a quiet private pier in Baan Nam Khem and returns again at 3pm, you could be back at your resort sipping a cocktail by 4:00pm. The best dive sites are far from the mainland but because transfers are so quick and efficient you have the chance to dive them all, including the world famous Richelieu Rock.

These day trips have been running for a number of years and are very well organized. The all inclusive price includes 2 dives per day, good quality rental dive equipment, national park fee’s, experienced Divemasters, lunch and unlimited soft drinks/water onboard, drinks and snacks at the private pier, and Khao Lak hotel transfers.

Group Sizes

Blue Dolphin is a large speedboat specially customized for divers, it can take a maximum of 18 divers. The total number of guests varies throughout the season but the busiest times are around the Christmas and New Year period in December and January. Dive groups are 4 or less per Divemaster/Instructor. To help meet safety standards divers are organized according to certification level and experience. If you come in a group or family with varying levels of certification/experience special arrangements can be made so that you can dive together.

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Similan Islands - Koh Bon - Koh Tachai - Richelieu Rock Overall rating: ☆☆☆☆☆ 0 based on 0 reviews
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