The Best of the Southern Thailand Sea: 5 Most Beautiful Islands in Southern Thailand
The southern seas of Thailand are among the most famous marine destinations in the world. Not only are they well-known within Thailand, but international media and travel publications often rank Thailand’s southern islands among the most beautiful in the world.
With crystal-clear waters, dramatic limestone cliffs, and white sandy beaches, the Southern Thailand Sea attracts travelers from all over the globe.
In this article, we’ll introduce five of the most beautiful islands in Southern Thailand that are often considered the highlights of the region. Each island has its own unique charm and offers a different travel experience for visitors looking to relax and explore Thailand’s tropical paradise.
1. Koh Samui
We begin with Koh Samui, the second-largest island in Thailand and one of the country’s most popular tourist destinations.
What makes Koh Samui special is the balance between natural beauty and modern comfort. The island offers stunning beaches alongside world-class facilities, making it suitable for many types of travelers.
Luxury resorts, stylish cafés, and excellent restaurants can be found all over the island. Some of the most famous beaches include Chaweng Beach and Lamai Beach, both known for their soft sand and beautiful sea views.
Location: Surat Thani Province, Gulf of Thailand
Highlight: Chaweng Beach with its clear water and lively atmosphere, and Lamai Beach known for beautiful sunsets
Atmosphere: A large and lively island with complete tourist facilities
Popular Activities: Snorkeling, boat trips around the island, and sunset viewing
Best Time to Visit: February to September
How to Get There: Fly directly to Samui Airport or take a ferry from Surat Thani
2. Phi Phi Islands
Moving to the Andaman Sea, the Phi Phi Islands are among Thailand’s most famous island destinations.
Their global popularity increased after the islands were featured in the movie The Beach. However, the true reason for their fame is the incredible natural scenery.
The islands feature turquoise waters, soft white sand beaches, towering limestone cliffs, and vibrant marine life. Visitors can also explore several beautiful bays and lagoons around the islands.
Location: Krabi Province, Andaman Sea
Highlight: Maya Bay with its emerald water and dramatic limestone cliffs
Atmosphere: Spectacular natural scenery with crystal-clear sea
Popular Activities: Island hopping, snorkeling, and exploring hidden bays
Best Time to Visit: November to April
How to Get There: Take a ferry from Krabi or Phuket
3. Phang Nga Bay
Another famous marine destination in Southern Thailand is Phang Nga Bay, a national park filled with dramatic limestone islands rising from the sea.
One of its most famous landmarks is Koh Tapu, also known as James Bond Island, which appeared in the film The Man with the Golden Gun.
Although the bay is not known for extreme water activities, it offers stunning natural scenery and peaceful exploration.
Location: Phang Nga Province, Andaman Sea
Highlight: James Bond Island and unique limestone formations
Atmosphere: Quiet and scenic with extraordinary natural landscapes
Popular Activities: Kayaking through caves, boat tours around limestone islands
Best Time to Visit: November to April
How to Get There: Boat departures from Phang Nga or Phuket
4. Phuket
Many people know that Phuket is actually the largest island in Thailand.
It is also one of the country’s most famous international travel destinations, welcoming millions of visitors every year. Phuket is unique because it offers both beautiful beaches and vibrant city life.
The island is home to several famous beaches, including Patong Beach, Kata Beach, and Karon Beach. In addition to its beaches, Phuket Old Town is another popular landmark known for its colorful architecture and cultural charm.
Location: Phuket Province, Andaman Sea
Highlight: Charming Phuket Old Town and lively nightlife
Atmosphere: International tourist destination with complete facilities
Popular Activities: Beach parties, snorkeling, swimming, and boat tours
Best Time to Visit: November to April
How to Get There: Fly directly to Phuket International Airport
5. Surin Islands
The final destination on this list is the Surin Islands, often considered one of the most beautiful diving locations in Thailand.
The islands are famous among divers worldwide and are sometimes referred to as the “jewel of the Andaman Sea.” Their marine ecosystem remains incredibly rich and well-preserved.
The surrounding waters are clear and full of coral reefs, making them ideal for snorkeling and scuba diving. Visitors may even encounter rare marine animals such as whale sharks and manta rays.
Travelers can also learn about the unique culture of the Moken people, a traditional sea nomad community living in the Andaman Sea.
Location: Phang Nga Province, Andaman Sea
Highlight: World-class coral reefs and marine biodiversity
Atmosphere: Pristine nature and peaceful surroundings
Popular Activities: Snorkeling, diving, and learning about Moken culture
Best Time to Visit: November to April
How to Get There: Speedboat from Khuraburi Pier
Final Thoughts
The Southern Thailand Sea is filled with natural beauty waiting to be explored. Whether on the Andaman coast or the Gulf of Thailand, each island offers a unique experience that cannot truly be appreciated through photos or articles alone.
To fully understand the beauty of these destinations, you need to experience them in person.
For travelers interested in exploring the southern sea around Krabi, Railay Eco Tour offers convenient and professional services. From ferry transfers to private island tours and speedboat charters, the company provides a complete travel experience for visitors looking to explore Krabi’s stunning islands.
Reference
travel.trueid.net - top thai islands
Than Bok Khorani National Park
Krabi walking street runs in the old-town quarter of Krabi town, on weekend evenings only — not every night. Visitors staying in Ao Nang who drive in without checking the day regularly find an empty street. The draw is freshly cooked food at local prices that Krabi people actually eat: grilled seafood, regional sweets, fresh-pressed juices, plus handicraft stalls from people in the area.
Railay EcoPoda Island is a small island in Krabi province, south of Ao Nang — roughly 20 to 30 minutes by longtail boat or about 15 minutes by speedboat. What stands out is the fine white sand and the water, which stays shallow on a long gentle slope.
Railay EcoPileh Lagoon sits on Phi Phi Leh in Krabi province — a bay almost completely ringed by tall limestone cliffs, with one narrow gap for boats to pass through. No swell reaches inside, so the water sits still, and the white sand floor below reflects the light back as emerald. Every trip to Phi Phi Leh stops here, because it is only minutes from Maya Bay.
Railay EcoKrabi Airport sits roughly 15 kilometres from Krabi town and 30 to 40 minutes by road from Ao Nang. To reach Ao Nang you can take the airport bus, a shared minivan, a taxi, or a private transfer booked in advance. Railay is a different matter: it is a peninsula no road reaches, so you take a vehicle to a pier and then a boat. The mistake people make most often is landing late and finding the last boats into Railay already finished for the day. This guide covers each transport option, journey times, rough costs, and how to handle a late arrival.
Railay EcoNopparat Thara Beach is in Krabi town district, immediately west of Ao Nang — five to ten minutes away on foot or by car. It runs for several kilometres, holds far fewer people than Ao Nang, and has the national park headquarters sitting right on the sand. The detail most visitors miss: at the lowest tides a sandbar emerges and you can walk out to the small island offshore without a boat. It also serves as a departure point for some island routes, so it works both as a place to rest and as a way out to sea. This guide covers how it differs from Ao Nang, how to get there, and when to go.
Railay EcoHong Island belongs to Krabi province and sits inside Than Bok Khorani National Park, north of Ao Nang — roughly 30 to 40 minutes by speedboat, or about an hour by longtail. What makes it different from the other Krabi islands is the lagoon in its middle: a pool of water almost entirely enclosed by tall limestone cliffs, with one narrow opening that small boats can slip through when the tide is high enough.
Railay Eco