Koh Rong Sanloem is the quieter of the two Koh Rong islands off Sihanoukville, a place of long pale beaches, small resorts and clear shallows where most of the activity involves hammocks. For travellers who want to add some adventure, an introductory dive course is a good way to meet the sea. This beginner experience covers the basics of breathing underwater, equipment handling and safety before a supervised dive with an instructor. No previous experience is needed, only reasonable health and the ability to swim a little. Underwater, the Gulf of Thailand around the island offers coral patches, small fish, rays and the occasional turtle, depending on the site and season. Visibility varies, and it is generally best in the dry months, roughly from November to May. The reefs here are not as dramatic as famous destinations elsewhere in Asia, but the calm water and gentle conditions make this a comfortable place to learn. You come away with a new skill, and perhaps the urge to continue with certification.
How it works
The programme usually begins with a briefing and a short pool or shallow-water practice, followed by one or more supervised dives from a boat or the beach. Equipment is supplied by the dive operator. Confirm the schedule, the group size, the boat transfer from Sihanoukville and the medical questionnaire with the operator when you book. Free cancellation terms and availability appear at checkout.
What to expect
Expect a morning or afternoon of learning, with time on the island between sessions. The water is warm, so a thin wetsuit or rash vest is enough. Instructors keep groups small and watch you closely, and they will teach you how to equalise your ears and clear your mask. You should not fly within a day of diving, so plan your itinerary accordingly. If you have asthma, heart conditions, a cold or are pregnant, speak to the operator before booking.
Making the most of it
Arrive well rested and avoid alcohol the night before. Eat lightly, hydrate and listen carefully during the briefing. A waterproof camera is a good idea if the operator can rent one, though you will need your hands free for learning. Stay overnight on the island if you can, because the beaches are quietest in the evening, and the night sky and the bioluminescent plankton that appear on some nights are memorable.
Good to know
Ferry and speedboat schedules between Sihanoukville and the islands vary with season and weather, and rough seas can delay boats in the wet season from roughly May to October. Island accommodation is simple, electricity can be limited and cash is useful because card machines are rare. Bring reef-safe sunscreen, a dry bag and a small amount of Cambodian riel or US dollars for small purchases.
Practical note
The cost of this experience is modest compared with certification courses, and it can credit toward further training with some agencies, but confirm that with the operator. Travel insurance that covers diving is advisable.
Why Koh Rong Sanloem
The island sits in sheltered water and has a relaxed, low-key feel, with small bungalows, a few restaurants and almost no traffic, so the experience feels like a getaway rather than a course. After diving, the best way to spend the afternoon is on Saracen Bay, a long curve of pale sand, or on the quieter beaches reached by short walks. Evenings are slow and sociable, with seafood grills, simple bars and clear skies. Many visitors extend a single dive day into two or three nights.
What to expect
The experience
A beginner scuba experience with instruction and supervised dives off Koh Rong Sanloem.
Best time
Go in the dry season, roughly November to May, for the best visibility.
How long
Half to full day including briefing and dives; confirm with the operator.
Tips
Avoid alcohol the night before, do not fly within a day of diving and mention any medical conditions.
Quick picks
- Best for
- Adventurous beginners who want to try diving in calm water.
- Families
- Check the operator for minimum age requirements.
- Couples
- Learning something new together makes a fun shared activity.
- Pair with
- A beach afternoon or an overnight stay on the island.
- Time needed
- Half to full day.
Good questions
Do I need to be a certified diver?+
No, this is a beginner experience led by an instructor.
When is the best time to dive?+
The dry season from roughly November to May usually has better visibility.
How do I reach Koh Rong Sanloem?+
Boats run from Sihanoukville; times vary by season and weather.
Can I fly after diving?+
You should wait at least a day, so plan your itinerary carefully.
Is there an age limit?+
Yes, usually, so check with the operator.
