We Wish You Were Here
Big Blue Diving Khao Lak
Similan Liveaboard Experts
Similan Diving Day Trips
Tomorrow's Dive Sites
19 April 2025
Koh Tachai
Sunday Dive Sites
20 April 2025
Richelieu Rock
2025 - 2026 Season - Early BIRD DISCOUNT
10% OFF ALL CABIN PRICES
Reserve you spot for the 2025 – 2026 Similan diving season now and get 10% off your cabin price.
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 Simian and Surin Islands including the amazing Koh Bon, Koh Tachai and Richelieu Rock commonly regarded as Thailand’s best dive site.
Our Similan Liveaboard
MV Blue Dolphin
A Similan Liveaboard allows you to do the most amount of diving in the shortest possible time, without ever feeling rushed. The MV 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 at an unbeatable price.
- SPECIAL DISCOUNTS
- PRICE MATCH GUARANTEE
- PERFECT DIVE GROUPS
- EXCELLENT SUPPORT
Our Similan Liveaboard
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 26,800 THB
With Big Blue’s legendary service there’s no better way to see the Similan Islands and Richelieu Rock
Up-Coming Similan Liveaboard Departures
Similan Liveaboard Features
Our Day Trip Speedboat
Dive with Us on the Wave Rider
Our daily schedule allows you to dive the best the West Coast has to offer, plus we dive at the world famous Richelieu Rock four days a week. This is the fastest way to see the best of the Similan and Surin National Parks
Day Trip Diving
To The Similans and Richelieu Rock
Big Blue Diving Khao Lak now has more day trip diving options than ever!!
Tomorrow's Dive Sites
19 April 2025
Koh Tachai
Sunday Dive Sites
20 April 2025
Richelieu Rock
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.
-
Sharkskin Titanium Chillproof Hood
2,516฿ Select options This product has multiple variants. The options may be chosen on the product page -
Sale!
Scubapro Go Sport Fins
2,438฿ – 4,875฿ Select options This product has multiple variants. The options may be chosen on the product page -
Deep Blue Safety Balloon
350฿ Add to basket -
Shearwater Teric
39,900฿ 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
Our Similan Liveaboard Trip Reports
Trip 29 has successfully returned back to land and what an epic trip it was with some (mostly) awesome company on board, multiple special sightings and some unforgettable dives along with delicious food and classic Blue Dolphin evening antics. It was a pleasure to welcome back some old friends and we’re also super happy to have made new ones.
Trip 27 just returned and what a trip it was.
We welcomed back some familiar faces and welcomed a few new ones to the ever growing Big Blue Crew.
Big currents, bigger fish and even bigger smiles!
Trip 25 saw some old friends return to the Andaman once again along with a lovely group of fresh new faces. As expected, everyone got on in no time which led to a really special trip full of laughs and stories.