Thailand’s No-Filter Marine Paradise

A chain of granite-and-jungle islands floating in electric-blue water—Mu Ko Similan is where Thailand feels most elemental: wild beaches, famous viewpoints, and some of the Andaman’s clearest snorkel-and-dive days.

Why Go

The Similan Islands are a protected marine national park off Phang Nga Province, long celebrated for visibility, coral gardens, and big-water scenery. The name “Similan” comes from a Malay dialect (Yawi), meaning “nine”—a nod to the original nine islands, even though the national-park area now includes 11 islands after expansions.

Travel Time from Phuket

Similan is a true “blue-water” day from Phuket—best enjoyed as a long day-trip or (even better) an overnight cruise.

• Approx. distance from Phuket: about 100–140 km depending on route and starting marina (many standard park departures use Thap Lamu Port near Khao Lak, which is closer to the islands).
  
• Private yacht cruise (18–22 knots): ~3.5–5 hours
  
• Speedboat (28–35 knots): ~2–3 hours (route/pier dependent)
  

Timing varies with sea conditions and departure point.

Best Time to Visit

The classic Similan window is the Andaman high season, when seas are calmer and underwater visibility is typically strongest—December to April is often considered the sweet spot for snorkelling and diving conditions.

Seasonal Access & Closures

Similan follows a strict annual monsoon-season shutdown for safety and reef recovery.

• 2025 closure (announced): 16 May – 14 Oct 2025.
  
• 2025–26 open season (reported): 15 Oct 2025 – 15 May 2026.
  
• E-ticket requirement (announced on reopening): visitors must purchase tickets online and provide ID (ThaiID for Thais; passport number for foreigners), with day-of tickets available only up to a morning cut-off time.
  
• Koh Tachai: the island itself has been closed to the public since 2016, though some surrounding dive sites have been treated as accessible for divers.
  

Top Things to Do

• Snorkel coral gardens in calm bays (great for mixed abilities)
  
• Dive iconic granite formations and swim-through terrain (conditions permitting)
  
• Hike to the Sail Rock viewpoint on Island #8 for the postcard panorama
  
• Beach time on the main visitor islands—arrive early for the calmest, most exclusive feel
  
• Add Koh Bon for a more “offshore” day—often loved by experienced divers for currents and pelagic potential
  

Signature Spots

• Island #8 (Ko Similan): Donald Duck Bay + Sail Rock viewpoint (the headline photo stop)
  
• Island #4 (Ko Miang): relaxed beach time and park-services hub feel
  
• Christmas Point / Island #9 zone: a famous dive area on many itineraries
  
• No-landing islands: some beaches (like turtle-nesting areas) are protected with no-landing rules—best enjoyed by tender from offshore.
  

Suggested Yacht Itineraries

Day Trip (Long, High-Reward)
Phuket → arrive late morning → snorkel + beach on #4/#8 → Sail Rock viewpoint → sunset cruise back.

Overnight (The Luxury Upgrade)
Day 1: Phuket → late-afternoon arrival for softer light and fewer boats → dinner onboard under the stars.
Day 2: early swim + second snorkel window → unhurried cruise home.

Island Hopping (Similan + Northern Andaman Circuit)
Similan core islands → Koh Bon (and surrounding dive/snorkel zones) → optional onward leg toward Surin-region routes (season and park rules permitting).

If you’re planning Similan with Clyde Andaman, this is where private yachting shines: fewer compromises on timing, more comfort between stops, and a pace that matches the place.

Quick Tips for a Smooth Visit

• Plan for an early arrival to enjoy clearer water and a calmer atmosphere
  
• Pack reef-safe sun protection and treat coral as “look, don’t touch”
  
• Keep footwear easy: beaches can be powder-soft, while granite paths can be warm midday
  
• Build in flexibility—Similan rewards the captain’s “best bay for today” call
  

FAQ

How many islands are in the Similan National Park area?
It’s commonly described as 11 islands (original nine plus additions such as Koh Bon and Koh Tachai).

What does “Similan” mean?
It comes from a Malay dialect (Yawi), meaning “nine.”

When is Similan open?
The park operates seasonally; for example, it reopened 15 Oct 2025 and was reported open through 15 May 2026.

Do I need an e-ticket?
Yes—on reopening, the park announced mandatory online ticketing with ID/passport details.

Is Koh Tachai open?
Koh Tachai has been closed to visitors since 2016 (indefinite closure has been widely reported).

What are the national park entry fees?
DNP’s published fee schedule (updated 2 June 2023) lists Mu Ko Similan at 100 THB (Thai adult) / 500 THB (foreign adult), and 50 THB (Thai child) / 250 THB (foreign child).

หมู่เกาะสิมิลันคือสวรรค์ของคนรักทะเล—น้ำใส หาดขาว และจุดชมวิว “Sail Rock” ที่เป็นภาพจำระดับไอคอน ช่วงที่เที่ยวสวยและทะเลมักนิ่งที่สุดโดยทั่วไปคือ ธ.ค.–เม.ย. และอุทยานมีการ ปิดฟื้นฟูตามฤดูกาล (เช่นปี 2025 ปิด 16 พ.ค.–14 ต.ค.) พร้อมระบบ E-Ticket ที่ต้องจองออนไลน์ล่วงหน้า เวลาเดินทางจากภูเก็ตด้วยเรือยอชต์ส่วนตัวโดยเฉลี่ยราว 3.5–5 ชั่วโมง (ขึ้นกับสภาพทะเลและจุดออกเรือ)