Scuba Diving in Thailand – 16 Best Scuba Diving Destinations

Want to see marine life up close and glide above mesmerizing coral reefs? Scuba diving in Thailand is the best way to plunge into these aquatic wonders and more!

Known as “The Diving Darling of Southeast Asia,” Thailand is the ultimate destination for exploring underwater treasures and discovering an aquatic paradise beneath the waves. Featuring over 100 diving sites, glittering coral reefs, and abundant marine life, it’s no surprise that this natural wonderland attracts thousands of tourists every year. Get ready to immerse yourself in Thailand’s captivating deep-sea adventures as you plunge into sparkling waters.

Thai scuba diving promises thrilling experiences for divers of all skill levels. Whether you’re a novice or an expert diver, Thailand offers a range of activities to choose from. Explore spectacular underwater ecosystems through reef diving, feel the exhilarating rush of drift diving as you get carried along by currents, or uncover ancient secrets through wreck diving, where sunken relics tell tales of history. 

For an unforgettable journey, consider hitching on a liveaboard and visiting the country’s most secluded diving spots.

16 Best Scuba Diving Destinations in Thailand

1. Richelieu Rock

Richelieu Rock, a large horseshoe-shaped reef, is one of Thailand’s best diving spots. As you conquer the turquoise depths, you will be surrounded by a flourishing array of sea creatures like whale sharks, manta rays, giant moray eels, and many colorful species of tropical fish. In this underwater realm, you will also find stunning red and purple corals decorating the sandy seabeds.

It is recommended for experienced scuba divers due to its depth and potential currents. To visit, head to the Andaman Sea, located 124 miles (200 kilometers) northwest of Phuket. It is accessible by liveaboard and day trip boat. 

Plan your trip between November and May for optimal weather conditions to ensure calm waters and good visibility. Diving tours typically cost 6,100 THB ($173) per person.

2. Koh Samui

Koh Samui is a popular diving destination next to lush rainforests, drawing in travelers seeking a lively blend of flora above and below sea level. One of Koh Samui’s most famous diving points, Green Rock, boasts underwater landscapes of intricate rock formations, caves, soft corals, and anemones. Descend into crystal-clear waters and discover vibrant marine life, such as hawksbill turtles, stingrays, eels, and barracuda.

The island welcomes new divers searching for a place to learn basic skills. Koh Samui is appreciated for its stable diving conditions all year round, but visibility is best from July to September. 

To get here, board a ferry directly from Koh Samui Airport, reachable from Bangkok (1 hour and 30 minutes away by plane) and Phuket (1 hour away by plane). Prepare 3,000 THB ($85) to secure a diving spot.

3. Surin Islands

Witness breathtaking beauty up close at the Surin Islands, an archipelago of five smaller islands 25 mi (40 km) off Thailand’s west coast. Here, you will notice coral reefs nestled steps away from the shore in magnificent hues, making it a prime snorkeling spot. 

The naturally picturesque location is beloved for its diverse attractions. Tourists can go hiking, camping, snorkeling, or scuba diving.

Ride a speedboat from Phuket or Khao Lak to get to the Surin Islands (1 hour and 30-minute ride). Scuba diving tours cost approximately 1,300 THB ($37).

4. Shark Point

Marine enthusiasts will not want to miss seeing rare leopard sharks at Shark Point, a well-known diving spot 17 mi (28 km) east of Phuket. With rich aquatic life such as lionfish, pufferfish, and blue-ringed angelfish, Shark Point offers no shortage of awe-inspiring encounters. See the marvelous coral reefs alongside lively sea creatures and create memories that will last a lifetime.

Shark Point has dive sites with a maximum depth of 78.7 feet (24 meters). Four-day trips usually include nearby places (King Cruiser Wreck or Phi Phi Islands) and cost about 4,000 THB ($113).

5. Koh Bon

If your favorite sea animal is the manta ray, drop by Koh Bon, a premier destination for Thai scuba diving. Serving as a cleaning station for manta rays, the ocean here is full of nutrients that keep these majestic creatures healthy. It is 12.4 mi (20 km) northeast of the Similan Islands and features an underwater ridge 131 ft (40 m) deep.

Because of the strong currents and open water, Koh Bon is not for divers with little or no prior experience. Also, note that Koh Bon closes annually from May to October for upkeep.

6. Chumphon Pinnacle

A plethora of natural wonders await scuba divers at Chumphon Pinnacle, just 7.5 mi (12 km) northwest of Koh Tao Island. This dive site is on a large granite pinnacle, inhabited by batfish darting among the pink anemones. Gear up and swim alongside Thailand’s vast biodiversity as bubbly schools of trevally and snapper swirl around you—and look out for gray reef sharks, too!

Advanced divers will be well-equipped to handle the site’s currents, which grow more forcefully depending on the wind strength. To experience Chumphon Pinnacle in full, pay 6,000 THB ($170) for a guided tour.

7. Sail Rock

Filled with unique seascapes and delightful views, Sail Rock is often pegged as one of the finest scuba diving spots in the country. Say hello to impressive creatures like the honeycomb grouper, bannerfish, and angelfish occupying every nook and cranny. Don’t forget to pass through the chimney-shaped rock formation 60 ft (18 m) below the surface for an unforgettable journey. 

The boat ride to Sail Rock from Koh Tao Island takes an hour and a half. For your convenience, book a trip in advance for 3,000 THB ($85).

8. Similan Islands

There’s a reason the Similan Islands stands out among the other spots on this list: it’s a UNESCO heritage site. Featuring dazzling white sand, tourists frequently go here seeking the best scenery in Thailand. To appreciate the beauty beneath the surface, head to one of 20 scuba sites and meet critters like ghost pipefish, ribbon eels, and turtles next to giant boulders.

You can reach the Similan Islands by taking a liveaboard from Phuket or Khao Lak. It is open only from mid-October to mid-May since the rest of the year is for the park’s maintenance.

9. Koh Ma Islands

If you’re a beginner scuba diver searching for a stress-free experience, look no further than the Koh Ma Islands. It is one of the most tranquil diving sites in Thailand.

Check out the Koh Ma Beach Resort to stay at this remote paradise overnight. It offers luxurious double rooms priced at 1,000 THB ($28) a night.

10. Koh Tachai

Embark on a deep blue adventure at Koh Tachai, where a unique dome-shaped granite pinnacle houses hard corals and sea fans. Consider the diverse array of creatures like mackerel, tuna, manta rays, and whale sharks amidst a backdrop of floating bubbles. The idyllic beaches at Koh Tachai offer the perfect retreat after an incredible day of diving.

Because of the challenging open waters, Koh Tachai is suitable only for advanced divers. Koh Tachai is close to other renowned Thai scuba diving sites like Koh Bon (12.4 mi or 20 km away) and the Similan Islands (24.9 mi or 40 km away). You can ride a liveaboard to get to this small rocky island.

11. King Cruiser Wreck

The calm waves east of Anemone Reef contain a secret waiting to be discovered. In 1997, a ferry named King Cruiser was transporting over 100 passengers when it crashed into a big rock and sank (miraculously, everyone on board survived). Today, travelers can glide through the waters and see the 279-foot-long (85-meter) ferry now nicknamed the “Thaitanic.”

King Cruiser Wreck is highly difficult to traverse due to its strong currents and sharp metal objects in the way. Only advanced certified divers are allowed to book a dive here.

12. Koh Tao (Turtle Island)

Make enchanting memories under the sea at Koh Tao, one of the most accommodating spots for new divers. It is known for being very budget-friendly with affordable rates. Some PADI instructors even offer free courses. Diving at Koh Tao is an excellent way to learn your first lessons and gain confidence in exploring the underwater world.

The best months to go to Koh Tao are April and May.

13. Koh Lanta (Emerald Cave)

Let Thailand’s aquatic scene unfold before your eyes at Koh Lanta, one of the best places to enjoy a relaxing vacation. Its allure lies in its peaceful ambiance and serene ocean view that will melt your worries. Seize the opportunity to venture into the impeccable Emerald Cave on the island’s western coast—it is guaranteed to be a highlight of your Thai scuba diving expedition.

The best time to roam Koh Lanta is from October to May. It’s accessible via speedboat and ferry from Phuket, Krabi, Ao Nang, and Koh Phi Phi.

14. Koh Phi Phi

Koh Phi Phi is a charming playground for marine animals—there’s no shortage of yellow boxfish, clownfish, hawksbill turtles, and cephalopods gliding through the waters. 

With gentle currents, Koh Phi Phi is an ideal destination for travelers who want to make scuba diving an integral part of their trip.

15. Koh Chang (Elephant Island)

Travel to Koh Chang if you want your adrenaline-filled scuba diving excursion to go hand-in-hand with fascinating views. Here, you’ll see the sunken warship HTMS Chang, initially used by the US Navy during World War II. Now adorned with artificial coral reefs, it welcomes tourists seeking a one-of-a-kind underwater encounter.

It’s best to visit Koh Chang from November to May. A ferry from Trat in southern Thailand (reachable via a domestic flight from Bangkok) will take you to Ko Chang in 30 to 45 minutes. Alternatively, you can take a 7-hour public bus ride directly from Bangkok.

16. Koh Dok Mai (Flower Island)

Koh Dok Mai beckons with gorgeous azure waters that make your Thai vacation especially rejuvenating. A haven for nature lovers, this remote island is 6.2 mi (10 km) west of Shark Point and is a good choice for scuba diving, with up to 66 ft (20 m) of visibility. Look out for seahorses, ghost pipefish, anglerfish, and shrimp.

Koh Dok Mai’s caves are only accessible to divers with relevant certifications.

Best Time To Go Scuba Diving in Thailand

The peak season for diving spans from November to May, during Thailand’s dry season. Sunny weather, calm seas, and ideal underwater visibility mark these months. During this peak season, popular areas such as Phuket and Koh Samui attract a large influx of tourists.

Diving hubs in the Similan Islands (including Koh Bon) and Surin Islands close annually for maintenance from May 16th to October 15th. Although planning your trip off-peak season narrows your options for places to go diving, an advantage is that there are fewer crowds, so you’ll have more space to yourself.

Useful Tips When Scuba Diving in Thailand

Before officially starting your splashing adventure, we recommend reviewing valuable information about required certifications. Read these practical tips to enjoy your trip without a hitch.

• Thailand is the global leader in producing PADI (Professional Association of Diving Instructors) diving certifications. If you’re serious about scuba diving and aim to get certified, there are plenty of dive centers to get high-quality training: Koh Lanta, Koh Samui, Koh Tao, Koh Chang, and Koh Phi Phi, to name a few.
• The PADI Open Water Diver Course will qualify you to dive 59 ft (18 m) deep. The course usually takes three and a half days to complete. Throughout the course, certified PADI instructors will discuss scuba-diving theory and the ins and outs of diving gear and guide divers through four practice sessions.
• If you’re a first-time diver, there are ample opportunities to enjoy the thrilling wonders of the ocean without a PADI certification. Most dive spots have PADI instructors who can accompany you safely up to a depth of 39 ft (12 m) and a basic safety briefing.
• Thailand is the cheapest diving hub in the world. Depending on the location, a single dive, including equipment, can cost 1,300-6,000 THB ($37-$173). The 3-day PADI Open Water Diver Course costs 6,000-10,500 THB ($173-$300).
• It’s essential to bring a swimsuit, towel, and sunscreen. While on a dive boat, wearing a hat and sunglasses will shield you from the sun.
• Wear a comfortable wetsuit or rash guard, a properly fitting mask, a snorkel, and fins.
• To ensure a safe dive, complete the medical questionnaire provided in the location (if any) before jumping in.
• If you have any pre-existing medical conditions, consult a physician before diving.
• Following safe diving practices such as proper buoyancy control, ascending slowly, monitoring cylinder pressure, and staying within limits is crucial. Make sure to check that inflators are connected and functioning.
• Be aware of potential hazards like currents or sea creatures that might sting.
• Listen closely to instructions given by instructors. Do not hesitate to ask questions if anything is unclear.

Frequently Asked Questions – Scuba Diving in Thailand

Is Thailand Good for Scuba Diving?

Yes, Thailand is known for being a fantastic destination for scuba diving. It offers diverse marine life, vibrant coral reefs, and a range of dive sites suitable for all experience levels. Some popular diving locations in Thailand include the Similan Islands, Richelieu Rock, and Koh Tao. 

Whether you’re a beginner or an experienced diver, Thailand’s waters provide ample opportunities to explore and discover the underwater world.

How Much Does Scuba Diving Cost in Thailand?

Depending on the location, a single dive, including equipment, can cost 1,300-6,000 THB ($37-$173). The 3-day PADI Open Water Diver Course costs 6,000-10,500 THB ($173-$300).

Which Month Is Best for Scuba Diving in Thailand?

The peak season for diving spans from November to May, during Thailand’s dry season. The weather conditions are favorable, and the sea is calm with good visibility. 

Where Is the Best Diving in Thailand?

Koh Tao, Koh Phi Phi, Ko Lanta, and Richelieu Rock are considered Thailand’s best scuba diving locations. These destinations offer many dive sites with vibrant marine life, stunning coral reefs, and unique underwater topography. 

Conclusion – Scuba Diving in Thailand

Thailand’s scuba diving scene is a must-visit for all adventure-seeking travelers. With its pristine waters, vibrant marine life, and stunning coral reefs, Thailand offers an unforgettable underwater experience. Whether you’re a beginner or an experienced diver, the diverse dive sites, including the Similan Islands, Koh Tao, and Koh Phi Phi, allow you to explore a world of wonder beneath the surface.

Immerse yourself in the warm tropical waters, encounter magnificent creatures like whale sharks and manta rays, and marvel at the colorful marine biodiversity. With professional dive operators and schools ensuring safety and quality experiences, Thailand provides the perfect setting for an incredible diving adventure. So pack your gear and dive into Thailand’s scuba diving paradise, where lifelong memories await beneath the waves.

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