Koh Rong weather by month
The best time to visit Koh Rong is December to February — 91/100 in February, 30°C and 11 rainy days. The best season is the dry season, November to April (85/100 on average).
The worst month is September at 51/100 — sweltering, soaked, clean air. See September →
Updated September 2026 · climate normals from ERA5 reanalysis
Planning the wider trip? Best time to visit Cambodia →
Best season: November to April (85/100 on average) · worst September (51/100)
- Days
- 30°C
- Nights
- 25°C
- Wet days
- 11
- Sun
- 10.8 h
- Humidity
- 79%
- Daylight
- 12 h

Koh Rong, month by month
Comfort score out of 100 for the kind of trip Koh Rong is best for, the average high, rainy days and hours of sun a day from the climate normals, and how busy it tends to be.
What's on in Koh Rong through the year
Festivals, natural spectacles, holidays and the seasons to watch out for — curated and sourced. The month pages carry the detail.
Crowds in Koh Rong in February
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.
Peak crowdstravelers describe it as peak season, Chinese New Year, school holidays in 2 of the markets that fill it
Sourced from traveler notes: “Forum posters place February inside Koh Rong's peak season, which runs roughly November through March and brings cool(…” — Tripadvisor community
Peak crowdsBusyShoulder seasonQuiet
Good to know before you go to Koh Rong
Real experiences from travellers' own write-ups, quoted with a link to the original.
Money
A guide to Koh Rong warns that despite the island now having more reliable electricity than in years past, ATMs still haven't arrived, so bringing all the cash you'll need for your entire stay is essential rather than assuming you can withdraw more once there. Their recommendation for seeing beyond the main beach: an ATV tour covers a genuine overview of the island and reaches remote beaches that would otherwise require a long walk through jungle terrain to find.
Traveller notes on Koh Rong
What people who have been say about the place — the year-round notes first, then month by month.
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.
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.
Add your own note from Koh Rong's card on the map.