Oct
Oct
Similan, Bon Tachai, Richelieu ( 4 day)
from
฿29,190
We Wish You Were Here!
Big Blue Diving Khao Lak
Similan Liveaboard Experts
Similan Liveaboard
Similan Diving Day Trips
Tomorrow's Dive Sites
4 November 2026
Surin Islands & Richelieu Rock
Thursday Dive Sites
5 November 2026
Tachai Reef & Tachai Pinnacle
Big Blue Diving Khao Lak
Big Blue Diving has been offering diving in Thailand for over 20 years and in Khao Lak since 2003. Khao Lak is the perfect departure point for the Similan and Surin Islands. The clear waters of the Andaman Sea typically provide great visibility and a huge diversity of marine life.
Our Similan liveaboard and Similan day trips offer diving at both the Andaman Seas national parks including the amazing Koh Bon, Koh Tachai and Richelieu Rock commonly regarded as Thailand’s best dive site.
Our Similan Liveaboard
Blue Dolphin
A Similan liveaboard allows you to do the most amount of diving in the shortest possible time, without ever feeling rushed. The Blue Dolphin offers 14 dives on our Similan 4 day cruise. Staff are professional and experienced. We are also a CCR and side-mount friendly boat with set up space and guides available for either style of diving.
Enjoy the spacious relaxation areas around the boat plus delicious Thai and international cuisine after a big day underwater.
- Excellent Support
- Perfect Dive Groups
- CCR & Sidemount Friendly
- SSI Affiliated Dive Centre
The Blue Dolphin
Dive with Us on the Blue Dolphin
Our Similan liveaboard trips are 4 days and 4 nights. The perfect length of time to see all the best dive sites that the Similan Islands and world famous Richelieu Rock have to offer.
4 days / 4 nights from 29,190 THB
With Big Blue’s legendary service there’s no better way to see the Similan Islands and Richelieu Rock.
Our Day Trip Speedboat
Dive with Us on the Wave Rider
All our day trips are two dives, with Richelieu Rock on the schedule three days a week — the fastest way to see the best of the Similan and Surin National Parks.
Journeys take 50 to 80 minutes depending on the site, with a home-cooked Thai buffet lunch after the first dive and plenty of time to be back on the beach for sunset.
Tomorrow's Dive Sites
4 November 2026
Surin Islands & Richelieu Rock
Thursday Dive Sites
5 November 2026
Tachai Reef & Tachai Pinnacle
Turtle Conservation Trips
We’ve partnered with Andaman Turtle Watch to offer an unique 4-night conservation-focused diving experience in the Similan Islands. These educational expeditions combines our renowned diving standards with hands-on turtle research opportunities.
Perfect for divers seeking an educational adventure that makes a difference.
Check-out Our 2026 - 2027 Turtle Trips
TRIP:
BB2608 Turtle Conservation Special
ROUTE:
Similans – Surin – Richelieu Rock
DIVES:
14
DEPARTS:
26 November 2026
RETURNS:
30 November 2026
BOOK THIS TRIP
TRIP:
BB2608 Turtle Conservation Special
DEPARTS:
26 November 2026
RETURNS:
30 November 2026
BOOK THIS TRIP
TRIP:
BB2729 Turtle Conservation Special
ROUTE:
Similans – Surin – Richelieu Rock
DIVES:
14
DEPARTS:
29 March 2027
RETURNS:
2 April 2027
BOOK THIS TRIP
TRIP:
BB2729 Turtle Conservation Special
DEPARTS:
29 March 2027
RETURNS:
2 April 2027
BOOK THIS TRIP
TRIP:
BB2708 Turtle Conservation Special
ROUTE:
Similans – Surin – Richelieu Rock
DIVES:
14
DEPARTS:
26 November 2027
RETURNS:
30 November 2027
BOOK THIS TRIP
TRIP:
BB2708 Turtle Conservation Special
DEPARTS:
26 November 2027
RETURNS:
30 November 2027
BOOK THIS TRIP
Need anything for your dive trip?
Big Blue Shop
Why not order now and we will have it waiting for you on your arrival on-board the MV Blue Dolphin.
The Big Blue Dive Equipment Shop
Coming to dive with us? Need anything for your trip?
Why not order now and we will have it waiting for you when you arrive in Khao Lak
Our store has some of the worlds best brands available at great prices.
When booking a trip with us, you will qualify for some even better deals too.
-
Shearwater Teric
39,900฿ Select options This product has multiple variants. The options may be chosen on the product page -
Sharkskin Titanium Chillproof Long Sleeve Full Zip Female
9,856฿ Select options This product has multiple variants. The options may be chosen on the product page -
Sharkskin Titanium Chill Proof Long Pants Male
8,178฿ Select options This product has multiple variants. The options may be chosen on the product page -
Sale!
Scubapro Go Sport Fins
Price range: 2,438฿ through 4,875฿ Select options This product has multiple variants. The options may be chosen on the product page
Live and Let Dive
Big Blue Diving Khao Lak
Live From Our Liveaboard
Get a real feel for what life is like aboard the MV Blue Dolphin with our Similan liveaboard trip reports. Written by our crew immediately after each expedition returns, these honest accounts capture the diving conditions, marine life encounters, and onboard atmosphere from every trip to the Similan and Surin Islands.
From epic whale shark sightings at Richelieu Rock to hunting tunas at Koh Bon Pinnacle, perfect drift dives at Three Trees to challenging currents at Christmas Point – our reports share the genuine experience of four days living and diving in Thailand’s premier national parks. Discover what makes each Similan diving season unique, learn about the diverse marine life we encounter, and see why our guests consistently rate their liveaboard experience as the highlight of their Thailand holiday.
Whether you’re planning your first liveaboard or you’re a returning guest wondering about current conditions, our trip reports give you an authentic glimpse into what awaits aboard the Blue Dolphin.
Latest Trip Report
21 – 25 October 2026
We swapped the itinerary to head north first, and it paid off: fish soup at Richelieu Rock, barracuda at Koh Tachai and Koh Bon all to ourselves.
Big Blue Diving Khao Lak
Diving with Confidence Since 2003
Over 20 years of Similan Islands diving — zero serious incidents. We follow strict international safety standards, verify every diver’s certification and experience, and ensure you’re fully prepared before you enter the water.