Koh Rong weather in April
April in Koh Rong: sweltering, rainy, with muggy air — fine if you can take 21 rainy days.
Updated September 2026 · climate normals from ERA5 reanalysis
#5 of 12 months in Koh Rong · #627 of 1413 destinations to visit in April · comfort 80/100 (tier A)
- Days
- 31°C
- Nights
- 27°C
- Wet days
- 21
- Sun
- 10.9 h
- Humidity
- 82%
- Daylight
- 12 h

Traveller notes on Koh Rong in April
Notes from nearby Phu Quoc (95 km away)
Koh Rong doesn't have its own notes for April yet — these are about Phu Quoc, close enough to share the season.
Phu Quoc-forum threads on April weather describe it as sitting right at the edge of the low-rain season, still officially inside it but with humidity climbing and the occasional scattered storm creeping in as the wet season approaches. Posters are consistent that any given shower runs brief rather than disruptive, and the month keeps its reputation as pleasant for beach time - warm, sunny, with gentler crowds and prices than true peak season. The record actually runs wetter than most forum threads suggest for a nominally low-rain month, a reminder the wetter transition can arrive earlier in a given year than the calendar label implies. The record: 33C days feeling like a punishing 39C, 25.2C nights, a notably high 107mm across 18.4 days, 77 percent humidity, a 31.2C sea and 11.1 hours of sun.
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.
Add your own note from Koh Rong's card on the map.
Koh Rong climate normals — April
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Koh Rong in April
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.
BusyKhmer New Year, school holidays in 3 of the markets that fill it(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 April
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Holiday
Khmer New Year
13–17 AprWater-festival New YearCrowdedClosuresSihanoukville empties onto the islands for three days and the ferries run full both ways. Khmer-run places on the island shut for the holiday itself. Source ↗
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 April — FAQ
- Is April a good time to visit Koh Rong?
- April in Koh Rong: sweltering, rainy, with muggy air — fine if you can take 21 rainy days. It ranks #5 of 12 months for Koh Rong on SeasonMap's comfort score (80/100).
- What is the weather like in Koh Rong in April?
- In April, Koh Rong averages a daily high of 31.3°C and a low of 26.9°C, with about 126 mm of rain over roughly 20.5 rainy days.
- What is the air quality in Koh Rong in April?
- Koh Rong has a mean US Air Quality Index of about 51 in April.
Within 300 km: Phnom Penh's Khmer New Year on 13–16 Apr, and Phu Quoc's Dry season around 15 Nov – 30 Apr.