Similan Islands

Introduction: Thailand's Premier Marine Paradise

Situated in the Andaman Sea off the coast of Phang Nga Province, approximately 85 kilometers northwest of Phuket and 65 kilometers west of Khao Lak, the Similan Islands (Mu Ko Similan National Park) represent Thailand's ultimate tropical archipelago. Established as a protected national park in 1982, this group of nine granite islands—derived from the Malay word "Sembilan" meaning nine—is globally celebrated for its powdery white coral sand beaches, giant smooth granite boulders, crystal-clear turquoise waters, and world-class marine biodiversity.

Consistently ranked among the top 10 dive sites in the world, the Similan Islands form an ecological sanctuary for sea turtles, manta rays, whale sharks, and vibrant coral reefs. To preserve its delicate marine ecosystems, the national park operates under strict seasonal conservation rules, welcoming travelers for daytime exploration and diving while strictly prohibiting overnight stays on the islands.

Key Islands, Granite Boulders, and Underwater Wonders

The archipelago's islands are officially numbered from South (Island No. 1) to North (Island No. 9), each offering distinct topographical features and underwater landscapes:

1. Koh Similan (Island No. 8) & Donald Duck Bay

The largest island in the archipelago, famous for its picturesque curved bay and the iconic **Sailing Rock (Hin Sail)** perched atop a high granite headland. Visitors can hike up a short, steep wooden and rock trail to the summit of Sailing Rock for 360-degree panoramic views over the turquoise bay below.

2. Koh Miang (Island No. 4) & Princess Bay

The second largest island and the administrative headquarters of the park. Home to two pristine white sand beaches (Honeymoon Bay and Princess Bay) connected by a shaded jungle trail, where wild Nicobar pigeons, flying foxes, and hermit crabs thrive.

3. World-Class Dive Sites (Elephant Head Rock & Richelieu Rock)

The waters surrounding Islands No. 7, 8, and 9 feature dramatic submerged granite pinnacles, swim-through caverns, and deep coral drop-offs. **Elephant Head Rock (Hin Pousar)** features maze-like boulder swim-throughs, while nearby **Richelieu Rock** and Koh Bon serve as prime gathering spots for majestic manta rays and harmless whale sharks.

4. Sea Turtle Sanctuaries (Islands No. 1, 2, and 3)

Islands No. 1 (Koh Hu Yong), No. 2, and No. 3 are strictly closed to all tourism activities, serving as protected nesting grounds for endangered green sea turtles and hawksbill turtles.

Key Highlights & Attraction Summary

• Sailing Rock Viewpoint (Island No. 8): Iconic granite boulder viewpoint overlooking Donald Duck Bay.
• World-Class Scuba Diving & Snorkeling: Exceptional 30-meter underwater visibility filled with sea turtles, rays, and tropical fish.
• Powdery Coral Sand Beaches: Pristine, flour-soft white coral sand beaches surrounded by crystal turquoise sea.
• Strict Marine Protection: Closed 5 months annually to allow coral reefs and wildlife to recover naturally.

How to Reach the Similan Islands

All trips to the Similan Islands depart via speedboat or catamaran from mainland piers in Phang Nga.

From Khao Lak (Closest Main Base)

Located just 60 to 65 km east of the archipelago. Speedboats and power catamarans depart daily from **Thap Lamu Pier** in Khao Lak, reaching the islands in roughly 75 to 90 minutes. Khao Lak serves as the most convenient, time-saving base for Similan excursions.

From Phuket International Airport (HKT) / Phuket Beach Resorts

Most tour operators provide air-conditioned van pick-ups from hotels across Phuket, driving 1.5 to 2 hours north to Thap Lamu Pier in Khao Lak before boarding speedboats across the Andaman Sea.

Best Time to Visit & Seasonal Park Closure

Strict operational dates dictate when visitors can travel to the archipelago.

Official Open Season (October 15 to May 15)

The national park is open to visitors **ONLY from October 15 to May 15** each year. During these months, the Andaman Sea experiences calm water conditions, clear blue skies, and optimal underwater visibility ranging from 20 to 35 meters.

Monsoon Closure (May 16 to October 14)

The entire national park is **STRICTLY CLOSED** to all tourists, boats, and divers from **May 16 to October 14** due to rough monsoon sea conditions and marine conservation protocols.

Top Nearby Attractions

1. Surin Islands National Park (100 km north)

A sister archipelago world-famous for vibrant shallow coral reefs and the authentic sea gypsy village of the Moken people.

2. Khao Lak Beach Coastline (65 km east)

A serene 20-kilometer stretch of golden sand beaches, luxury beachfront resorts, and ethical elephant sanctuaries on the Phang Nga mainland.

3. Khao Sok National Park (120 km northeast)

Ancient evergreen rainforest featuring limestone karst peaks, wild elephants, and emerald Cheow Lan Lake floating raft houses.

Things to Do at the Similan Islands

• Climb to Sailing Rock Viewpoint: Hike up the giant granite boulders on Island No. 8 for iconic panoramic bay photos.
• Snorkel with Sea Turtles: Swim in crystal-clear waters off Koh Miang and Koh Payu alongside wild green sea turtles.
• Scuba Dive Deep Pinnacles: Join liveaboard dive boats to explore granite swim-throughs and spot manta rays at Koh Bon.
• Relax on Princess Bay Beach: Walk barefoot along the flour-soft white coral sands of Island No. 4.

Local Food and Culinary Delights

Day-trip tours include buffet lunches served at park ranger stations or on board tour catamarans.

Must-Try Culinary Specialties

• Southern Thai Seafood Buffets: Massaman chicken curry, stir-fried squid with garlic, and grilled tiger prawns served on tour vessels.
• Fresh Tropical Fruits: Chilled sweet mango, pineapple, and watermelon served fresh on board during return boat journeys.
• Khao Lak Night Market Eats: Return to mainland Khao Lak to enjoy fresh grilled Andaman snapper, Pad Thai, and mango sticky rice.

Where to Stay: Accommodation Options

Overnight stays on the Similan Islands are strictly prohibited by the Thai Department of National Parks to protect fragile ecology. All visitors stay on the mainland or aboard liveaboard dive vessels.

Mainland Khao Lak Beach Resorts ($50 – $250 USD / 1,800 – 8,500 THB per night)

• The Haven Khao Lak / Devasom Khao Lak Beach Resort / La Flora Khao Lak / Robinson Club Khao Lak: Luxury beachfront resorts located near Thap Lamu Pier, offering swimming pools, spa facilities, and seamless pier transfers.

Scuba Diving Liveaboard Boats ($150 – $400 USD / 5,000 – 14,000 THB per night)

• Multi-day liveaboard vessels offering overnight cabin stays at sea for certified scuba divers visiting deep offshore reefs.

Budget Travel Guide for Similan Islands

• Tour Package Rates: Full-day speedboat snorkeling packages from Khao Lak range from **2,500 to 3,800 THB per person** (approx. $70–$105 USD), including roundtrip hotel transfers, park entry fees, snorkeling gear, lunch, and insurance.
• National Park Entry Fees: Included in most tour packages—official national park fee is **500 THB for foreign adults** (300 THB for children) plus a **200 THB diver fee** for scuba diving.
• Base in Khao Lak to Save: Staying in Khao Lak instead of Phuket eliminates long 2-hour morning van rides to the pier.

Sample 1-Day Itinerary

• 06:00 AM: Hotel pick-up from Khao Lak or Phuket toward Thap Lamu Pier in Phang Nga.
• 08:00 AM: Check in at the pier lounge, receive snorkeling equipment, and attend safety briefing.
• 08:30 AM: Board a high-speed catamaran across the Andaman Sea toward the Similan Islands.
• 10:00 AM: Arrive at **Koh Miang (Island No. 4)**; snorkel in turquoise waters alongside sea turtles and relax on Princess Bay.
• 11:30 AM: Enjoy a buffet lunch of Thai specialties at the island park station.
• 01:00 PM: Cruise to **Koh Payu (Island No. 7)** for deep-water reef snorkeling among clownfish and live corals.
• 02:15 PM: Arrive at **Koh Similan (Island No. 8)**; climb up to **Sailing Rock Viewpoint** for iconic photos over Donald Duck Bay.
• 03:30 PM: Depart the islands on the return boat trip back across the Andaman Sea to Thap Lamu Pier.
• 05:00 PM: Arrive at the pier and transfer back to your hotel in Khao Lak or Phuket.

Essential Marine Protection Rules

• Reef-Safe Sunscreen Mandatory: Thailand strictly bans sunscreens containing oxybenzone, octinoxate, 4-MBC, or butylparaben to protect delicate coral reefs from bleaching—use zinc oxide-based mineral sunscreens.
• No Touching Marine Life: Never touch, step on, or hold corals, sea turtles, fish, or marine invertebrates.
• No Disposable Plastic: Single-use plastic bags and styrofoam containers are banned inside the national park.
• Daily Visitor Quotas: Entry is capped at roughly 3,325 visitors per day—advance booking with licensed tour operators is required.

Frequently Asked Questions (FAQs)

1. Where are the Similan Islands located?

The Similan Islands are located in the Andaman Sea, Phang Nga Province, Southern Thailand, about 65 km west of Khao Lak and 85 km northwest of Phuket.

2. When are the Similan Islands open to tourists?

The national park is open **ONLY from October 15 to May 15** each year. It is closed from May 16 to October 14 for monsoon season and marine conservation.

3. Can you stay overnight on the Similan Islands?

No, overnight stays on the islands are strictly prohibited. Visitors stay at mainland hotels in Khao Lak/Phuket or aboard liveaboard dive boats.

4. How do you get to the Similan Islands from Phuket?

Book a tour package that includes a 1.5-hour van transfer from Phuket to Thap Lamu Pier in Khao Lak, followed by a 75-minute speedboat ride across the sea.

5. What is Sailing Rock?

Sailing Rock (Hin Sail) is the famous sail-shaped giant granite boulder perched atop Island No. 8, offering panoramic views over Donald Duck Bay.

6. How much does a day tour to the Similan Islands cost?

Day tours cost between **2,500 and 3,800 THB per adult**, which includes boat transfers, park fees, gear, meals, and insurance.

7. Are the Similan Islands good for snorkeling?

Yes, they offer Thailand's finest snorkeling with 20 to 35-meter underwater visibility, green sea turtles, clownfish, and colorful hard corals.

8. What sunscreen is allowed at the Similan Islands?

Only reef-safe mineral sunscreens free of chemical ingredients like oxybenzone and octinoxate are permitted inside Thai marine national parks.

9. Is base location better in Phuket or Khao Lak?

Khao Lak is much closer to Thap Lamu Pier (15–20 minutes), saving you over 3 hours of van travel time compared to staying in Phuket.

10. What marine animals can you see while diving/snorkeling?

Green sea turtles, hawksbill turtles, manta rays, harmless leopard sharks, whale sharks, barracudas, and colorful anemone fish.

Conclusion

The Similan Islands stand out as Thailand's ultimate marine crown jewel, where giant smooth granite boulders, iconic Sailing Rock viewpoints, powdery white coral sand, crystal turquoise sea, and world-class sea turtle diving converge in the Andaman Sea. From climbing to the summit of Island No. 8 and snorkeling alongside green sea turtles to relaxing on Princess Bay's flour-soft sands and staying in luxury Khao Lak beachfront resorts, the Similans deliver an unmissable tropical paradise. Plan your trip between October and May, wear reef-safe sunscreen, and explore the Similan Islands!