Koh Rong in March
Last fact-checked: October 2026. Climate figures are long-term averages for nearby Sihanoukville.
March is still dry season, a little hotter and usually a bit quieter than December to February.
| Average daytime high | 31 °C |
| Average night-time low | 24 °C |
| Average rainfall | 76 mm |
| Average sea temperature | 28.4 °C |
Long-term averages for nearby Sihanoukville: World Meteorological Organization 1982-2024; sea temperature: seatemperature.org.
Weather
Expect sunny, hot days with rising humidity. The first short showers can appear towards the end of the month.
Sea and activities
The sea is mostly calm and warm, good for swimming, snorkeling and island hopping.
Holidays and crowds
There are no major holidays in March, so it is a good month for travelers who want dry weather with fewer crowds.
Best Beaches & Coast Conditions in March
Both east and west coasts remain calm and clear throughout March, with virtually no swell and warm, gentle breezes in the afternoon.
- Recommended Activities: Prime season for spotting whale sharks and rays on deeper dive sites, kayaking through the Prek Ta Sok mangroves, and long sunset swims along Sok San Beach.
- What to Pack & Booking Tip: Lightweight cotton or linen clothes, refillable insulated water bottle, electrolyte packets for hot midday scooter rides, and high-SPF sunscreen.
Koh Rong Weather in March: FAQ
What is the weather like on Koh Rong in March?
March is hot, sunny, and dry, with daytime highs around 31–32 °C, sea temperatures of 28.4 °C, and occasional refreshing short showers (~76 mm total) toward the end of the month.
Is March still high season on Koh Rong?
Yes, March offers peak dry-season beach weather with slightly fewer crowds and better hotel availability than January and February.
Can you see bioluminescent plankton in March?
Yes, warm calm seas in March make night swimming with bioluminescent plankton particularly comfortable—aim for nights around the new moon.