Koh Rang Marine Park
Full-day snorkelling and scuba diving
The protected reef system between Koh Mak and Koh Chang offers the area's strongest coral-garden experience. Dry-season day boats leave Koh Mak for snorkelling and multi-dive trips.
Underwater Koh Mak
Koh Mak Snorkeling & Diving
A practical guide to Koh Rang Marine Park, the shallow reef at Koh Kham, nearby islets, trip prices and the season with the clearest water.
Choose your trip
The best snorkeling and diving sites near Koh Mak
Koh Kham
Easy snorkelling from the beach
A short boat ride from Ao Suan Yai. The reef begins in shallow water close to the sand, making this the simplest option for beginners and families.
Koh Rayang islets
Short local boat trips
The two small islands off Ao Kao are often combined with Koh Kham. Their nearby reefs suit travellers who want a shorter outing rather than a full marine-park day.
Koh Pii at Ao Lom
A nearby reef and kayak outing
This tiny rock and shallow reef lies close to Koh Mak's south-east coast. Visit only in calm conditions and ask a local operator about the safest route that day.
Scuba diving
Beginners, certified divers and courses
Koh Mak Divers is a PADI 5 Star dive centre on the island. Current prices are ฿3,500 for a two-dive trip, ฿4,300 for Discover Scuba and ฿14,800 for the Open Water PADI course, with equipment, marine park fees, lunch and resort transfers included. The full price list is below — confirm availability before booking.
Experienced divers can also ask about the HTMS Chang wreck. Site choice depends on certification, sea conditions and the operator's schedule.
From the water
Koh Mak Divers has been established for three decades on Koh Mak, and is now also Padi certified. Book your accommodation here and get 10% discounts for your diving and snorkeling experience on Koh Mak.
Season & costs
When to go and what to budget
Trips and dives
| Trip or dive | Good to know | Price |
|---|---|---|
| Snorkelling trip | Full day in the marine park · children up to 12 pay half | ฿1,200 |
| Dive trip · 2 dives | For certified divers | ฿3,500 |
| Discover Scuba · 2 dives | No licence needed | ฿4,300 |
| Night dive | Minimum 3 divers | ฿2,000 |
| Wreck dive · HTMS Chang | Minimum 4 divers | ฿3,900 |
| Tune-up · 2 dives | Refresher for divers who have been away a while | ฿3,900 |
PADI courses
| Course | Length | Price |
|---|---|---|
| Open Water | 3 days · eLearning included | ฿14,800 |
| Advanced | 2–3 days | ฿14,500 |
| Rescue | 4 days | ฿15,600 |
| Divemaster | Minimum 4 weeks | ฿55,000 |
Every price above includes marine park fees, equipment, lunch, fruit, water and free resort transfers. Course prices include eLearning, with no hidden costs. Guests who book their stay on Koh Mak get 10% off diving and snorkelling.
Prices are a planning guide and may change. For seasonal context, see the best time to visit Koh Mak.
Go responsibly
Protect the reef and check conditions
- Use reef-safe sunscreen or a long-sleeve rash guard.
- Do not stand on, touch or collect coral and marine life.
- Take all rubbish back to Koh Mak, including small plastic items.
- Follow the boat crew's safety briefing and never enter rough water alone.
FAQ
Koh Mak snorkeling questions
When is the best time for Koh Mak snorkeling?
November to April usually brings the calmest water and clearest visibility. Conditions can change daily, so confirm the forecast and boat schedule locally before departure.
How much is a Koh Rang snorkelling trip?
A full-day snorkelling trip with Koh Mak Divers is ฿1,200 per person, and children up to 12 years pay half. Marine park fees, equipment, lunch, fruit, water and resort transfers are included. Confirm the current total when you book.
What is the Koh Rang Marine Park entrance fee?
The locally listed fee is ฿200 per adult and ฿100 per child. Koh Mak Divers trip prices already include it, but fees can change, so ask whether the current charge is included in any boat ticket you buy elsewhere.
Can beginners scuba dive from Koh Mak?
Yes. Koh Mak Divers offers a Discover Scuba option for first-timers as well as PADI courses and fun dives for certified divers. Discuss health requirements and current conditions directly with the dive centre.