On diving vacation to Thailand
Thailand has been one of Asia’s most popular diving destinations for years. And for good reason. The country offers an impressive mix of colorful coral reefs, tropical islands, spectacular rock formations, and encounters with extraordinary marine life such as manta rays, whale sharks, and sea turtles.
Whether you’re looking to take your first breaths underwater, are an experienced diver, or want to combine a liveaboard trip with a tour of the country, Thailand has something to offer every diver. In this guide, you’ll learn all about the most beautiful dive sites, the best time to travel, popular destinations such as Koh Tao and the Similan Islands, and how to combine a diving vacation with a tour of Thailand.
General Information About Thailand
Thailand is located in Southeast Asia and borders Myanmar, Laos, Cambodia, and Malaysia. The country is known for its hospitable people, rich culture, tropical beaches, impressive temples, and excellent cuisine. The capital, Bangkok, is the bustling heart of the country, while the northern regions are known for their mountains, natural beauty, and traditional villages.
With thousands of kilometers of coastline and hundreds of islands, Thailand has become one of Asia’s top diving destinations. Thanks to its well-developed infrastructure, wide range of accommodations, and relatively low costs, Thailand is also an accessible destination for both beginner and experienced divers.
Facts About Thailand
- Capital: Bangkok
- Language: Thai
- Currency: Thai Baht (THB)
- Flight time from the Netherlands: approximately 11 to 12 hours
- Water temperature: an average of 27 to 30°C
- Underwater visibility: 10 to 40 meters on average, depending on location and season
- Diving level: suitable for beginners through to very experienced divers
Why go diving in Thailand?
Thailand offers a combination of factors that make the country so attractive to divers.
- Warm water all year round: with water temperatures between 27 and 30 degrees, a thick wetsuit is almost never necessary. In many areas, a shorty or a thin wetsuit is sufficient.
- Suitable for all skill levels: Thailand offers calm reefs for beginners, as well as challenging dive sites with currents, deep pinnacles, and pelagic species for advanced divers.
- Rich biodiversity: while diving in Thailand, you might encounter whale sharks, manta rays, sea turtles, leopard sharks, reef sharks, moray eels, seahorses, and large schools of barracuda, among other creatures
- Excellent value for money: Thailand remains one of the most affordable destinations in the world for learning to dive. Liveaboards, diving trips, and accommodations are also often attractively priced.
- Perfect for combining with a road trip: one of Thailand’s biggest advantages is that diving can easily be combined with nature, culture, cuisine, and beach vacations.
Where to go diving in Thailand?
Thailand has two major diving regions: the Andaman Sea on the west coast and the Gulf of Thailand on the eastern side of the peninsula. Both areas have their own unique character, marine life, and diving seasons.
Which region is best for you depends on when you’re traveling and what you want to see underwater. Many divers choose the Andaman Sea because of its spectacular dive sites and the chance to see large marine life, while the Gulf of Thailand is particularly popular for its relaxed atmosphere and accessible diving conditions.
Andaman Sea: including the Similan Islands and Richelieu Rock
Most of the well-known dive sites are located in the Andaman Sea. Here you’ll find Phuket, Khao Lak, Koh Phi Phi, Koh Lanta, and the world-famous Similan Islands, among others. Top dive sites such as Richelieu Rock, Koh Bon, and Koh Tachai are also located in this region. The Andaman Sea is known for its clear waters, impressive granite rock formations, and the chance to encounter larger marine animals such as manta rays and whale sharks. For many experienced divers, this part of Thailand is therefore the absolute highlight.
Thailand’s Gulf Coast: including Koh Tao
On the other side of the peninsula lies the Gulf of Thailand. This is where popular islands such as Koh Tao, Koh Samui, and Koh Phangan are located. Conditions are generally calmer than in the Andaman Sea, making this area particularly suitable for beginner divers and those looking to earn their diving certification. Koh Tao, in particular, has become one of the world’s best-known destinations for diving courses.
The Best Diving Spots in Thailand
Thailand offers a vast array of diving opportunities, ranging from colorful reefs around tropical islands to remote dive sites where manta rays and whale sharks are frequently spotted. The most spectacular diving areas are located in the Andaman Sea off the country’s west coast.
We personally consider the Similan Islands to be the absolute highlight of a diving trip to Thailand. This archipelago is known for its crystal-clear waters, impressive rock formations, and healthy coral reefs.
North of the Similan Islands lie Koh Bon, Koh Tachai, and Richelieu Rock. These dive sites are frequently visited during liveaboards and are among Thailand’s most spectacular locations. Richelieu Rock, in particular, has an almost legendary reputation among divers. The horseshoe-shaped rock attracts enormous schools of fish and is known as one of the best spots in the country for spotting whale sharks. Manta rays are also regularly seen here.
Around Phuket and Koh Phi Phi, you’ll find a wide variety of dive sites suitable for both beginners and experienced divers. Here, colorful reefs, steep walls, and limestone rock formations alternate. Well-known dive sites such as Shark Point, Bida Nok, and Bida Nai offer the chance to encounter sea turtles, reef sharks, and large schools of tropical fish.
Those looking for a less crowded experience often choose Koh Lanta. This island serves as a base for the famous dive sites Hin Daeng and Hin Muang. These underwater mountains rise from deep waters and attract large schools of fish. Thanks to the strong currents and nutrient-rich conditions, these locations are among the best spots in Thailand for encounters with manta rays and whale sharks.
On the other side of the peninsula, in the Gulf of Thailand, lies Koh Tao. Although the island is best known as one of the most affordable places in the world to get a diving certification, it also offers surprisingly beautiful diving. Thanks to its calm conditions and easy accessibility, it’s an ideal destination for beginner divers and backpackers who want to explore the underwater world during their travels.
Best Time to Dive in Thailand
Thailand can be visited almost year-round, but the ideal time to visit depends largely on the region where you want to dive. Because the main diving areas are located on opposite sides of the peninsula, the Andaman Sea and the Gulf of Thailand have different weather patterns.
Andaman Sea
For many divers, the Andaman Sea is the most important region. It is home to the Similan Islands, Richelieu Rock, Koh Bon, Koh Tachai, Phuket, and Koh Lanta. The diving season here runs from about mid-October to mid-May, when the sea is calm and conditions are at their best. The absolute best months are December through April. During this period, the water temperature typically ranges between 28 and 30°C, and visibility can reach up to 30 meters or more. Conditions are often excellent, especially between February and April, and the chances of encountering manta rays and whale sharks are highest during this time.
The Similan Islands are open only during this season. Outside of this period, the islands are closed due to the monsoon and to protect the fragile marine ecosystem.
Gulf of Thailand
On the other side of the peninsula lies the Gulf of Thailand, home to destinations such as Koh Tao, Koh Samui, and Koh Phangan. Here, the best conditions are generally between February and September. The water here is also warm, with temperatures ranging from 28 to 30°C, while visibility often varies between 10 and 25 meters, depending on the location and season. Thanks to the relatively calm conditions, this region is popular among beginner divers and travelers looking to earn their diving certification.
For those visiting Thailand with diving as their main goal, the period from January through April is often considered the best time to travel. The combination of calm seas, excellent visibility, and the chance to see manta rays and whale sharks makes this the ideal time for a liveaboard trip to the Similan Islands and Richelieu Rock.
Tour of Thailand
Thailand is an ideal destination for travelers who want to combine diving with nature, culture, and the beach. That’s why many of our tours begin with a diving program or liveaboard in the Andaman Sea. You’ll start your trip by exploring the underwater world around the Similan Islands, Richelieu Rock, or other famous dive sites, and then continue your journey through the country.
A popular combination is a liveaboard or a stay in Phuket followed by a visit to Khao Sok National Park. This impressive nature reserve is known for its ancient rainforest, limestone rock formations, and the beautiful Cheow Lan Lake. After a few days underwater, Khao Sok offers a nice change of pace with jungle hikes, boat trips, and overnight stays on the lake.
From Khao Sok, there are several options for continuing your journey. Some travelers choose to spend a few more days relaxing on the coast, for example in Krabi, Koh Lanta, or Phuket. Others travel on to Bangkok to explore the temples, markets, and lively atmosphere of the capital.
If you want to explore Thailand more thoroughly, you can travel from Bangkok to historic destinations such as Ayutthaya and Kanchanaburi. There, you’ll discover a completely different side of the country, where ancient temples, national parks, and an impressive history take center stage.
Northern Thailand also pairs perfectly with a diving trip. From Bangkok, you can easily travel on to Chiang Mai, Chiang Rai, or Pai. Here, tropical beaches give way to green mountains, traditional villages, and a relaxed atmosphere. This creates a varied trip that combines spectacular diving with nature, culture, and the hospitality for which Thailand is so well known.
Diving vacations to Thailand:
