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-certified dive centre on the island. Current guide prices start from ฿3,100 for two fun dives, ฿3,900 for Discover Scuba and ฿14,500 for an Open Water PADI course. Confirm inclusions and availability directly before booking.
Experienced divers can also ask about the HTMS Chang wreck. Site choice depends on certification, sea conditions and the operator's schedule.
Season & costs
When to go and what to budget
| Experience | Guide price | Best for |
|---|---|---|
| Koh Rang snorkelling day trip | About ฿1,000/person | Coral gardens and a full day out |
| Marine Park fee | ฿200 adult · ฿100 child | Visitors entering the protected area |
| Two scuba fun dives | From ฿3,100 | Certified divers |
Prices are a planning guide and may change. Ask whether transfers, equipment, food and park fees are included. 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?
The activities listed on this guide currently start around ฿1,000 per person, plus the marine-park fee where it is not included. Confirm the current total, equipment and lunch with the operator when booking.
What is the Koh Rang Marine Park entrance fee?
The locally listed fee is ฿200 per adult and ฿100 per child. Fees can change, so ask whether the current charge is included in your boat ticket.
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.