Koh Rong in May
Great time to visit
The shoulder season sweet spot where you get decent weather at much better prices. Rain showers are refreshing rather than ruinous, and fewer tourists mean you'll have beaches more to yourself.
Weather
May marks the official start of wet season, though it's more like 'occasionally wet' season. Morning thunderstorms become common, but they're usually brief and followed by clearing skies. Humidity jumps significantly, making the heat feel more oppressive.
34°C high27°C low8 rain days
Crowds & Cost
moderate crowds
~$65/day average
Events & Festivals
- •Buddha Day (Vesak Day)
- •Royal Plowing Ceremony
May Tips
- •Pack quick-dry clothing and waterproof bags
- •Morning boat trips often have calmer seas before afternoon storms
- •Mosquito nets become crucial as standing water increases
All Months
November through April is peak season for good reason. The northeast monsoon keeps things dry, temperatures hover around 28°C, and the sea stays calm for boat transfers. December and January are busiest — book accommodation well ahead.
May through October brings the southwest monsoon. Expect daily afternoon downpours, rough seas that cancel boat services, and many guesthouses closing entirely. But here's the upside: the few places that stay open offer serious discounts, and you'll have beaches almost entirely to yourself between rain showers.
The bioluminescent plankton peaks during the dry season, especially on dark nights between November and March. Full moon periods wash out the effect, so time your visit for the new moon if this is your main reason for coming.
Avoid Cambodian holidays like Khmer New Year (April) and Pchum Ben (October) when domestic tourists pack the island. Chinese New Year (January/February) also brings crowds, though the atmosphere stays more international than local holiday periods.
Koh Rong Scores
Solo
7/10
Couples
7/10
Families
5/10
Adventure
8/10
Budget
8/10
Luxury
3/10