Koh Rong in October
Last fact-checked: October 2026. Climate figures are long-term averages for nearby Sihanoukville.
October is the end of the rainy season, with gradually more dry days.
| Average daytime high | 31 °C |
| Average night-time low | 23 °C |
| Average rainfall | 310 mm |
| Average sea temperature | 29.3 °C |
Long-term averages for nearby Sihanoukville: World Meteorological Organization 1982-2024; sea temperature: seatemperature.org.
Weather
Rain decreases to around 300 mm over the month and sunny spells become longer.
Sea and activities
The sea becomes calmer towards the end of the month, and snorkeling conditions improve.
Holidays and crowds
Pchum Ben (10-12 October in 2026) is a major holiday when many Cambodians travel, so expect busier ferries around those dates.
Best Beaches & Coast Conditions in October
Transition month: as winds shift from southwest back to northeast during October, both the East Coast and West Coast become progressively calmer week by week.
- Recommended Activities: Improving underwater visibility for snorkeling and diving by late October, still-flowing waterfalls in the jungle interior, and calm evening plankton tours.
- What to Pack & Booking Tip: Mix of sun protection and a light rain jacket for passing showers, plus reef-safe sunscreen as daily sunshine hours increase.
Koh Rong Weather in October: FAQ
Does the weather improve on Koh Rong in October?
Yes! Rainfall drops by nearly half compared to August (~310 mm vs 617 mm), and the second half of October often brings long stretches of sunny, calm dry-season weather.
Are waterfalls still worth visiting in October?
October is actually the sweet spot for waterfalls: months of monsoon rain keep Varisan Nureach Waterfall full while the trails and skies dry out.
Are hotel prices still low in October?
Most resorts keep their low-season or shoulder-season rates until the end of October before high-season pricing starts in November.