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
5 November 2026
Tachai Reef & Tachai Pinnacle
Friday Dive Sites
6 November 2026
Koh Bon
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.
Find a space
Aboard Blue Dolphin
- Direct booking
- Price match guarantee
- Fast Confirmation
- No card fees
Oct
21
Oct
25
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Oct
27
Oct
31
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Nov
2
Nov
6
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Nov
8
Nov
12
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Nov
14
Nov
18
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Nov
20
Nov
24
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Nov
26
Nov
30
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Dec
2
Dec
6
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Dec
8
Dec
12
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Dec
14
Dec
18
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Dec
19
Dec
23
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Dec
24
Dec
28
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Dec
29
Jan
2
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Jan
5
Jan
9
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Jan
10
Jan
14
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
More info
Jan
16
Jan
20
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Jan
22
Jan
26
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Jan
28
Feb
1
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
More info
Feb
3
Feb
7
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Feb
9
Feb
13
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Feb
15
Feb
19
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Feb
21
Feb
26
Similan, Bon Tachai, Richelieu ( 5 day)
6 days, 5 nights • 18 dives …
from
฿36,487
Feb
27
Mar
3
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Mar
5
Mar
9
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Mar
11
Mar
15
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Mar
17
Mar
21
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Mar
23
Mar
28
Similan, Bon Tachai, Richelieu ( 5 day)
6 days, 5 nights • 18 dives …
from
฿36,487
Mar
29
Apr
2
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Apr
3
Apr
7
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Apr
8
Apr
12
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Apr
14
Apr
18
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Apr
20
Apr
24
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Apr
27
May
1
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
May
3
May
7
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Oct
15
Oct
19
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Oct
21
Oct
25
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Oct
27
Oct
31
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Nov
2
Nov
6
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Nov
8
Nov
12
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Nov
14
Nov
18
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Nov
20
Nov
24
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Nov
26
Nov
30
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Dec
2
Dec
6
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Dec
9
Dec
13
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Dec
15
Dec
19
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Dec
21
Dec
25
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Dec
29
Jan
2
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
More info
Jan
5
Jan
9
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Jan
11
Jan
15
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Jan
17
Jan
21
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Jan
23
Jan
27
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Jan
28
Feb
1
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Feb
3
Feb
7
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Feb
9
Feb
13
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Feb
15
Feb
19
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Feb
21
Feb
26
Similan, Bon Tachai, Richelieu ( 5 day)
6 days, 5 nights • 18 dives …
from
฿36,487
Feb
27
Mar
2
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Mar
4
Mar
8
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Mar
10
Mar
14
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Mar
16
Mar
20
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Mar
22
Mar
27
Similan, Bon Tachai, Richelieu ( 5 day)
6 days, 5 nights • 18 dives …
from
฿36,487
Mar
29
Apr
2
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Apr
3
Apr
7
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Apr
8
Apr
12
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Apr
15
Apr
19
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Apr
21
Apr
25
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
Apr
27
May
1
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
May
3
May
7
Similan, Bon Tachai, Richelieu ( 4 day)
5 days, 4 nights • 14 dives …
from
฿29,190
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
5 November 2026
Tachai Reef & Tachai Pinnacle
Friday Dive Sites
6 November 2026
Koh Bon
Saturday Dive Sites
7 November 2026
Richelieu Rock
Our Diving Courses
Learn to Dive with Us in Khao Lak
From your first breath underwater to technical and professional-level diving, we teach the full range of SSI courses right here in Khao Lak. Whether you’re starting out or building toward a career underwater, our instructors get you there properly — no shortcuts, ever.
Living Blue
Diving That Gives Something Back
Living Blue is how we put something back into the Andaman Sea. Our Turtle Conservation trips get you hands-on with real research, the SSI Turtle Ecology course trains you to understand it, and our School Programme passes it on to the next generation of Thai divers. It’s not a side project — it’s part of every trip we run.
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.
-
Scubapro Solo Mask
2,645฿ Add to basket -
Sharkskin Titanium Chillproof Hood
2,516฿ 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 -
Deep Blue Safety Balloon
350฿ Add to basket
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.