Koh Rong weather in October

October in Koh Rong: sweltering, soaked, with clean air — a gamble, with 28 rainy days.

Updated September 2026 · climate normals from ERA5 reanalysis

Koh Rong🇰🇭 Cambodia · Southern Vietnam & Cambodia · Island57
  1. 90Jan
  2. 91Feb
  3. 85Mar
  4. 80Apr
  5. 63May
  6. 60Jun
  7. 54Jul
  8. 59Aug
  9. 51Sep
  10. 57Oct
  11. 76Nov
  12. 88Dec

#10 of 12 months in Koh Rong · #1203 of 1413 destinations to visit in October · comfort 57/100 (tier D)

Days
30°C
Nights
26°C
Wet days
28
Sun
8.1 h
Humidity
86%
Daylight
12 h
Koh Rong, Cambodia
Photo: allPhoto Bangkok · Pexels

Traveller notes on Koh Rong in October

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.
KohRongIslandRegular · August · 1 month ago · Read more on Tripadvisor ↗
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.
Tripadvisor community · February · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Koh Rong's card on the map.

Koh Rong climate normals — October

Daytime high30°C / 86°F🔥 sweltering
Nighttime low26°C / 79°F
Feels like (high)37°C / 99°F
Sea temperature30°C / 86°F♨️ bath-warm
Rainfall405 mm / 15.9 in⛈ soaked
Rainy days28 days
Humidity86%💦 very humid
Dew point25°C / 77°F
Sunshine8.1 h/day
Daylight11.9 h
Wind12 km/h / 7 mph
Air quality (US AQI)35🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Koh Rong in October

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.

Quietschool holidays in 3 of the markets that fill it, one of its worst months for weather(estimated)

JFMAMJJASOND

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).

Toughest weatherKoh Rong's weather peaks December–February.

JFMAMJJASOND

Best weatherFair weatherToughest weather

What's on in Koh Rong in October

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Season

    Rough crossings in the wet

    1 Jun – 15 Oct · usuallyMonsoonRisk

    The southwest monsoon puts a swell across the channel and the fast boats from Sihanoukville get cancelled at short notice. Leave a spare day either side of a flight.

  • Season

    Wet season

    MonsoonRisk

    28 rainy days and about 405 mm in the month — the real kind of rainy season, not afternoon showers.

    from the climate normals

What's on around the world in October →

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?

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Koh Rong in October — FAQ

Is October a good time to visit Koh Rong?
October in Koh Rong: sweltering, soaked, with clean air — a gamble, with 28 rainy days. It ranks #10 of 12 months for Koh Rong on SeasonMap's comfort score (57/100).
What is the weather like in Koh Rong in October?
In October, Koh Rong averages a daily high of 29.8°C and a low of 26°C, with about 404.5 mm of rain over roughly 28.3 rainy days.
What is the air quality in Koh Rong in October?
Koh Rong has a mean US Air Quality Index of about 35 in October.

Within 300 km: Phnom Penh's Pchum Ben around 10 Sep – 10 Oct, and Phu Quoc's Phu Quoc visa exemption on 1 Jan – 31 Dec.