The Andaman’s “Five Islands” for Crystal Reefs & Secret Swim-Throughs

Just offshore from Koh Lanta, Koh Haa delivers that rare combo: calm, glassy lagoons for snorkelling… and dramatic limestone walls that drop into an underwater world divers talk about for years.

Why Go

Koh Haa (often called the “Five Islands”) is a small, uninhabited cluster of limestone islets inside Mu Ko Lanta National Park, known for clear water, coral gardens, and iconic cavern-style dive features.
It’s also a perfect “yacht rhythm” destination: arrive early, swim and snorkel while the light is soft, then linger over lunch with the whole seascape as your backdrop.

Travel Time from Phuket

Koh Haa is close enough for a long day, and even better as part of an island-hopping route.

• Approx. distance from Phuket (Rassada area) to Koh Lanta: ~38 nautical miles
  
• Koh Haa relative to Koh Lanta: about 11 miles southwest of Koh Lanta
  
• Practical total (route-dependent): ~48–55 nm
  

Estimated timings:

• Private yacht cruise (18–22 knots): ~2.5–3.5 hours
  
• Speedboat (28–35 knots): ~1.5–2.25 hours
  

Timing varies with sea conditions and departure point—your captain will optimize the route for comfort.

Best Time to Visit

For the most reliable visibility and calm-water days, the Andaman “high season” window—roughly November to April—is typically the sweet spot for Koh Haa-style snorkelling and diving.
Shoulder months can still be rewarding when conditions are settled—especially for guests who prioritize scenery and space.

Seasonal Access & Closures

Because Koh Haa sits within Mu Ko Lanta National Park, seasonal management matters:

• Rainy-season closure (most smaller islands): 16 May – 14 October each year (for safety and marine recovery).
  
• Park logistics: fees and rules apply; plan with your operator so entry is seamless.
  
• E-ticketing (announced): Thailand’s Department of National Parks has announced an e-ticket pilot/rollout for several southern marine parks from 15 Oct 2025, including Mu Ko Lanta—worth confirming close to travel.
  

Top Things to Do

• Snorkel the shallow reef shelves in bright, turquoise water
  
• Dive Koh Haa’s signature swim-throughs and “cathedral-style” chambers (conditions permitting)
  
• Drift along limestone walls looking for turtles, reef fish, and seasonal surprises
  
• Linger at anchor for an unhurried lunch with a view
  
• Pair Koh Haa with nearby highlights (Phi Phi / Lanta / Koh Rok) for a varied, multi-day route
  

Signature Spots

• Koh Haa Yai area: famous for cavern-style features and dramatic limestone structure
  
• Mooring buoy zone: convenient for a relaxed stop and easier positioning in popular areas
  
• Lunch-stop cruising lane: Koh Haa is often treated as a scenic midway pause between Phi Phi and southern islands
  

Suggested Yacht Itineraries

Day Trip (Phuket → Koh Haa “Blue-Water Day”)
Early departure → snorkel session + light lunch at anchor → optional second swim stop → sunset cruise back.

Overnight (Best of Lanta + Koh Haa)
Day 1: Phuket → Koh Lanta bay for a calm evening and dinner ashore.
Day 2: Morning run to Koh Haa for peak visibility → snorkel/dive → return north or continue south.

Island Hopping (3–5 Days, Dive-Forward)
Phuket → Phi Phi → Koh Haa → Koh Lanta base → optional Koh Rok day → back to Phuket.
With Clyde Andaman, this route feels especially polished: you can time the best conditions, avoid the busiest windows, and enjoy Koh Haa at an unhurried pace.

Quick Tips for a Smooth Visit

• Aim for a morning arrival for calmer water and clearer visibility
  
• Use mooring buoys where available to keep reefs healthy
  
• Keep plans flexible around sea state—Koh Haa is at its best when the water is calm and bright
  
• If you’re travelling near the monsoon edge, confirm park access windows and site conditions in advance
  

FAQ

Where are the Haa Islands?
Koh Haa is a small group of uninhabited limestone islets southwest of Koh Lanta, within Mu Ko Lanta National Park.

Is Koh Haa good for snorkelling and diving?
Yes—Koh Haa is widely known for reef snorkelling plus cavern/swim-through style dive features.

How long is the boat ride from Phuket?
Typically 2.5–3.5 hours by private yacht, depending on routing and conditions (faster by speedboat). Distance references include Phuket–Koh Lanta at ~38 nm, plus Koh Haa southwest of Lanta.

Is Koh Haa open year-round?
Many smaller islands in Mu Ko Lanta National Park are seasonally closed 16 May–14 Oct each year.

Do we need tickets or park fees?
Yes—national park rules and fees apply, and an e-ticket system has been announced for several southern marine parks from 15 Oct 2025, including Mu Ko Lanta.

เกาะห้า (Koh Haa) คือหมู่เกาะหินปูนเล็ก ๆ ใกล้เกาะลันตา น้ำใสเหมาะมากสำหรับดำน้ำตื้นและดำน้ำลึก โดยเฉพาะช่วง พ.ย.–เม.ย. ที่ทะเลมักนิ่งและทัศนวิสัยดี พื้นที่อยู่ในเขตอุทยานหมู่เกาะลันตาและมีช่วงปิดเกาะย่อยตามฤดูกาลประมาณ 16 พ.ค.–14 ต.ค. เวลาเดินทางจากภูเก็ตด้วยเรือยอชต์ส่วนตัวโดยเฉลี่ยราว 2.5–3.5 ชั่วโมง (ขึ้นกับสภาพทะเลและจุดออกเรือ)