Why go
Compared with Thailand’s more built-up island resorts, Cambodia’s smaller islands still run on generator power in places, with limited roads and a fraction of the visitor numbers. That trade-off is the whole appeal: fewer facilities, but beaches and water without a crowd competing for them. Koh Thansur belongs to this looser, quieter island scene rather than the package-resort model found elsewhere in the region.
It suits travellers who have already covered the mainland circuit through [Siem Reap](destinations/siem-reap) and [Phnom Penh](destinations/phnom-penh) and want a stretch of unplugged time before flying out, more than it suits anyone chasing nightlife or a long list of activities. Bring cash, bring patience with boat schedules, and treat the destination as downtime rather than a checklist.
Things to do
Beach time without the crowds
The main draw on Cambodia’s smaller islands is simply the beach itself — clear, warm water and sand that rarely fills up, since visitor numbers stay low compared with better-known island destinations across the region.
Snorkelling the reefs
Fringing reefs sit close to shore around many of Cambodia’s outer islands, and snorkelling gear is often available to rent locally or bring with you. Visibility and reef condition vary by season and by exact location, so it is worth checking current conditions with whoever runs your boat.
Boat trips between islands
Cambodia’s Gulf islands cluster together closely enough that hopping between two or three by boat in a day is common, letting you compare a busier beach with a near-empty one on the same trip.
Disconnecting
Power and mobile signal are limited on the smaller islands, often running on generators for set hours rather than round the clock. For many travellers that limitation is the actual selling point — a genuine break from connectivity that is hard to find elsewhere on a Cambodia itinerary.
When to go
The dry season, November to April, gives the calmest crossings and the most reliable boat schedules, along with the clearest water for snorkelling. This is the window most operators recommend for island time on this stretch of coast.
During the wet season, May to October, seas can turn rough enough to delay or cancel crossings, and some smaller operations scale back or close entirely. If travelling in these months, build flexibility into your schedule around the boat.
Getting there and around
Boats to Cambodia’s outer islands leave from mainland piers, most often in [Sihanoukville](destinations/sihanoukville) or Kep, with the exact route and operator depending on where you are headed. Schedules and journey times vary, so it is worth confirming departure points locally rather than assuming a fixed timetable.
Once on the island, expect to get around on foot or by a short local boat hop between beaches, since most of these islands have little to no vehicle road network.
Tours that include Cambodia
Cambodia currently features in our multi-country routes rather than as a standalone island tour. Any of the following can be paired with independent island time before or after.
Plan your trip
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