Koh Rong weather in May
May in Koh Rong: sweltering, soaked, with clean air — a gamble, with 29 rainy days.
Updated September 2026 · climate normals from ERA5 reanalysis
#7 of 12 months in Koh Rong · #1130 of 1413 destinations to visit in May · comfort 63/100 (tier C)
- Days
- 31°C
- Nights
- 27°C
- Wet days
- 29
- Sun
- 9.4 h
- Humidity
- 85%
- Daylight
- 13 h

Traveller notes on Koh Rong in May
Other months in Koh Rong
Koh Rong's forum describes August as a genuine mixed bag - a decent mixture of sun and rain, with some stretches going several days rain-free and others turning genuinely miserable. One island worker described 15 straight days where it rained almost around the clock, which posters treated as an extreme outlier rather than typical. When rain does hit, it's usually a heavy hour-to-90-minute burst at night, early morning or mid-afternoon, and rough seas can cancel boat trips on the worst days. Opinions on visiting are genuinely split - some steer clear of Koh Rong entirely in August, while one experienced regular was confident sunny days still outnumber wet ones.
Forum posters place February inside Koh Rong's peak season, which runs roughly November through March and brings cool(er), dry conditions relative to the rest of the year - though posters are quick to add that the beaches themselves still run very hot and sunny by day, with water and a hat treated as essential rather than optional. The white-sand beaches and clear, warm water are repeatedly praised, with Sunset Beach singled out for its turquoise water. On the practical side, posters note some visitors worry about choppy seas delaying the ferry crossing even in the dry season, so building a buffer day into ferry-dependent travel plans is a common piece of advice.
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Koh Rong climate normals — May
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Koh Rong in May
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 2 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Koh Rong's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherKoh Rong's weather peaks December–February.
Best weatherFair weatherToughest weather
What's on in Koh Rong in May
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Wet season
MonsoonRisk29 rainy days and about 337 mm in the month — the real kind of rainy season, not afternoon showers.
from the climate normals
Nearby, and something's on
Within 300 km of Koh Rong — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Koh Rong?
Koh Rong in May — FAQ
- Is May a good time to visit Koh Rong?
- May in Koh Rong: sweltering, soaked, with clean air — a gamble, with 29 rainy days. It ranks #7 of 12 months for Koh Rong on SeasonMap's comfort score (63/100).
- What is the weather like in Koh Rong in May?
- In May, Koh Rong averages a daily high of 31°C and a low of 27°C, with about 336.7 mm of rain over roughly 28.6 rainy days.
- What is the air quality in Koh Rong in May?
- Koh Rong has a mean US Air Quality Index of about 41 in May.
Within 300 km: Phu Quoc's Phu Quoc visa exemption on 1 Jan – 31 Dec.