Koh Rong in July
Last fact-checked: October 2026. Climate figures are long-term averages for nearby Sihanoukville.
July is one of the wettest months of the year, suited to travelers who don't mind rain and want peace and low prices.
| Average daytime high | 31 °C |
| Average night-time low | 24 °C |
| Average rainfall | 562 mm |
| Average sea temperature | 29.4 °C |
Long-term averages for nearby Sihanoukville: World Meteorological Organization 1982-2024; sea temperature: seatemperature.org.
Weather
Rain is frequent, sometimes in longer spells, with over 550 mm on average. Daytime temperatures stay around 31°C.
Sea and activities
Rough seas can occasionally cause ferry cancellations. Some local guides report a particularly strong plankton glow in the rainy season.
Holidays and crowds
Many resorts offer big discounts. Keep a buffer day before your onward flight in case a ferry is cancelled.
Best Beaches & Coast Conditions in July
Definitely choose the East Coast (Long Set 4K Beach, Pagoda Beach, Koh Touch, or Coconut Beach). West-coast Sok San Beach experiences onshore monsoon waves and strong currents in July.
- Recommended Activities: Waterfall hikes at peak flow, kayaking in sheltered Prek Ta Sok mangroves, scooter rides between rain showers, and peaceful beach walks with almost no crowds.
- What to Pack & Booking Tip: Waterproof bag for all luggage on the ferry, seasickness tablets if you are sensitive to swell, quick-dry clothes, and 1 buffer day before any international flight.
Koh Rong Weather in July: FAQ
Is it safe to travel to Koh Rong in July?
Yes, provided you stay near the sheltered east-coast piers (Koh Touch or Long Set) and keep one buffer day in Sihanoukville or Phnom Penh before your flight home in case rough seas delay a ferry.
Why visit Koh Rong in July?
Lush emerald rainforest, roaring jungle waterfalls, empty white-sand beaches, and luxury resort villas at half their winter price.
Can you swim in the sea in July?
Yes, on the sheltered east coast (Long Set, Pagoda, and Coconut Beach) the sea remains warm (29.4 °C) and swimmable on most days, whereas the west coast can be rough.