Best spots Diving & Snorkeling trip 2025 in Koh Samui

Dive into Paradise: Snorkeling and Scuba Diving in Koh Samui, Thailand

If you're dreaming of exploring vibrant coral reefs in crystal-clear tropical waters, there's no better place than Koh Samui, Thailand. Often referred to as a paradise in the Gulf of Thailand, Koh Samui is a stunning island located in Surat Thani Province, southern Thailand. With its powdery white beaches, lush landscapes, and endless ocean adventures, it’s no wonder travelers from around the globe are drawn to this tropical gem.

When is the Best Time to Visit Koh Samui?

Before packing your fins and goggles, it’s good to know that Thailand's coastline is divided into four major zones: the east coast, the upper Gulf, the lower Gulf, and the Andaman coast. Koh Samui lies along the lower Gulf of Thailand.

• The best time to visit is from April to mid-October, when the weather is dry, sunny, and perfect for water activities.
• Avoid visiting during the monsoon season, which typically runs from mid-October through March. During this period, heavy rains and rough seas can disrupt travel plans and limit access to diving spots.

When the conditions are just right, Koh Samui becomes a snorkeler's and diver’s paradise. The island offers a wide variety of snorkeling tours and world-class scuba diving sites waiting to be explored. Whether you're a beginner or an experienced diver, Koh Samui delivers unforgettable underwater adventures teeming with marine life and colorful coral reefs.

1. Snorkeling in Koh Samui Island
         - Mu Koh Ang Thong National Park
         - Koh Tao, Koh Nangyuan, Koh Phangan
         - Madsum Island, Taen Island

2. Scuba diving into the deep sea at Koh Samui

3. Koh Samui 3 Days 2 Nights Package
         - Koh Samui 3 Days 2 Nights Package with Hotel & Snorkeling Tour
         - Koh Samui 3D2N Package with Hotel, Snorkeling Tour & Ferry from Surat Thani

Snorkeling in Koh Samui Island

1. Mu Koh Ang Thong National Park

Let’s start with a quick introduction. Mu Ko Ang Thong National Marine Park is a breathtaking archipelago located in the Gulf of Thailand, consisting of 42 lush limestone islands surrounded by turquoise waters. One of the park’s most iconic highlights is Talay Nai, a stunning emerald saltwater lake nestled in the heart of a mountain. Visitors can enjoy snorkeling and kayaking around scenic spots, led by expert local guides who ensure a safe and enjoyable experience.

For adventure seekers, don’t miss the opportunity to hike up to the panoramic viewpoint, where you’ll be rewarded with a spectacular 360-degree view of the entire archipelago. As most of the terrain is steep limestone, a guided trek is essential for safety. Besides sightseeing, the park also offers a variety of fun outdoor activities that make for an unforgettable day in nature.

How to Get to Mu Ko Ang Thong from Koh Samui. Wondering if it’s difficult to get there? No worries, daily full-day tours to Mu Ko Ang Thong are available from Koh Samui, operated by local tour companies. You can choose between two convenient options:

• Travel by Big Boat – A more relaxed and stable ride, ideal for those who prefer comfort and scenic cruising
• Travel by Speedboat – A faster and more adventurous way to reach the park, perfect for maximizing time on the island

2. Koh Tao, Koh Nangyuan, Koh Phangan

Let’s continue the adventure to three iconic islands that are absolute favorites among snorkeling enthusiasts. These islands aren’t just famous—they’re breathtaking, offering vibrant marine life and scenic beaches that are hard to forget.

• Koh Tao – Asia’s #1 Snorkeling Destination

Welcome to Koh Tao, the crown jewel of snorkeling in Asia. Surrounded by 25 picturesque beaches, this island is a dream for sea lovers. Whether you’re gliding over coral reefs, basking under the sun, or just soaking in the salty sea breeze, Koh Tao offers a vibe that’s both peaceful and energizing.

• Koh Nang Yuan – A Postcard-Perfect Paradise

Just a short hop away, Koh Nang Yuan is often ranked among the most beautiful islands in the world. Here, you can snorkel in calm, shallow waters while catching a magical sunset—yes, at the same time. Almost everyone who visits Koh Nang Yuan leaves with one thought: I have to come back.

• Koh Phangan – More Than Just the Full Moon Party

Next, we arrive at Koh Phangan, internationally known for its legendary Full Moon Party, a once-in-a-lifetime celebration that draws people from all corners of the world.

But Koh Phangan is more than just nightlife. It’s home to stunning beaches like Haad Yao, Haad Rin, and a hidden gem, Pha Sawan Viewpoint. Tucked away at the end of a quiet trail, this spot offers panoramic views that are guaranteed to steal your breath away (and your camera storage!).

Worried about logistics? Don’t be! You can explore all three islands in one day with a snorkeling speedboat tour departing from Koh Samui. It’s simple, convenient, and guaranteed to give you unforgettable memories.

3. Madsum Island, Taen Island

Let’s head to the final two must-visit islands near Koh Samui, Koh Madsum and Koh Taen, each offering a unique and unforgettable island experience.

Koh Madsum – The Famous “Pig Island” of Thailand

Often lovingly referred to as “Pig Island Thailand,” Koh Madsum is known for its friendly pigs that roam freely along the sandy shores. Originally raised by locals, these pigs have now become social media stars, attracting travelers and celebrities from all over the world who come to snap photos with these adorable beach companions.

But that’s not all, Koh Madsum is a peaceful paradise where you can:

• Take a leisurely walk across the island from one side to the other
• Enjoy a lush, forested backdrop
• Relax on the beach while soaking in the sea breeze
• Or explore the shallow reefs and watch vibrant marine life from the shore

Koh Taen – A Snorkeler’s Paradise

Just a short 15-minute long-tail boat ride from Koh Madsum lies Koh Taen, a lesser-known gem perfect for nature lovers. The island features:

• Extensive coral reefs are ideal for snorkeling
• A tranquil beach for those seeking peace and quiet
• A natural, untouched atmosphere is perfect for a day of relaxation

Scuba diving into the deep sea at Koh Samui Island

There are various spots in Koh Samui where tourists may go scuba diving to get close to nature. Let's go check to see where they are.

• Sail rock, also known as Hin Bai is one of the dives that scuba divers should not miss. It is close to Koh Tao, located between Koh Samui and Koh Phangan, and it is here that visitors will dive into deep water and endure a rocky tunnel down to a depth of roughly 30 meters.
• Chumphon has three greatest diving locations, which are Koh Ngam Yai, Koh Ngam Noi (HTMS Prab), and Hin Lak Ngam. Each of these dive destinations is distinct in its own right, with stunning coral reefs. You can't go to Chumphon and not visit them.
• Dive Site White Rock Scuba diving is quite popular in Koh Tao. Dive down to view the structure of the white rock stacks stacked in layers, which make up coral reefs, and numerous water life gathered in the white rock.

However, before we can go Scuba diving, we must go through training with qualified instructors first. This Scuba diving training comes highly recommended by us. 

• Scuba Birds
• The Drive Academy
• Discovery

It's important to stay safe while diving and enjoy the undersea world.

How do you feel after reading through to the end? It's thrilling merely to read this. Let me assure you that if you get the opportunity to experience the real thing and the real place, you will not be disappointed and will go home with an unforgettable experience.

Koh Samui 3 Days 2 Nights Package

The Koh Samui 3D2N Package with hotel and snorkeling tour from Ticket2Attraction is the perfect hassle-free getaway for anyone looking to explore the underwater world and relax on one of Thailand’s most famous islands.

1. Koh Samui 3 Days 2 Nights Package with Hotel & Snorkeling Tour

Package Highlights

✔️ 2-night stay at a quality hotel in Koh Samui with daily breakfast
✔️ Enjoy snorkeling at Ang Thong Marine Park with vibrant coral reefs and rich marine life
✔️ Easy booking through Ticket2Attraction — no planning required!

Starting Price: ฿2,990 per person (from the original price ฿5,590)

2. Koh Samui 3D2N Package with Hotel, Snorkeling Tour & Ferry from Surat Thani

This upgraded package includes everything you need from transport to activities, making your trip as smooth as possible.

Package Highlights

✔️ Round-trip ferry tickets: Surat Thani – Koh Samui
✔️ Round-trip hotel transfers between Samui pier and your accommodation
✔️ 2-night stay at a quality hotel in Koh Samui with breakfast
✔️ Snorkeling day trip at Ang Thong Marine Park with beautiful coral reefs
✔️ Easy booking through Ticket2Attraction

Starting Price: ฿4,290 per person (from the original price ฿5,990)

Thailand's islands are no less than those in the Bahamas or the Maldives. Koh Samui has generated the greatest number of divers in the world. If you're ready, let's go explore the underwater world and search of clown fishes!

Updated May 2025