Sihanoukville weather in March
March in Sihanoukville: sweltering, rainy — fine if you can take 37°C afternoons.
Updated September 2026 · climate normals from ERA5 reanalysis
#4 of 12 months in Sihanoukville · #344 of 1413 destinations to visit in March · comfort 85/100 (tier A)
- Days
- 31°C
- Nights
- 26°C
- Wet days
- 17
- Sun
- 10.9 h
- Humidity
- 74%
- Daylight
- 12 h

Traveller notes on Sihanoukville in March
Notes from nearby Phu Quoc (65 km away)
Sihanoukville doesn't have its own notes for March yet — these are about Phu Quoc, close enough to share the season.
March is inside Phu Quoc's dry high season - November to March on the strict reckoning, stretching to May on the generous one - and regulars call it a safe month: hot, sunny, blue sky, calm water. Our row gives 32.3C reading as 37C with a 29.4C sea. The island-specific advice is about which coast. The west is fine in March but is the side that turns rough and murky when the wind gets up or the wet season arrives; the east is more sheltered, and Khem Beach in its bay is the one they name for reliably clear, calm water. Our row still counts 14.7 precipitation days carrying only 50.7mm, which is the brief tropical shower rather than a wet month. The record: 24.2C nights, 11 hours of sun and a 21 kph wind.
Other months in Sihanoukville
Sihanoukville forum regulars describe August as genuine monsoon season, with rain that can hit overnight, early morning or mid-afternoon and, when it does, comes down hard for roughly an hour before clearing. One traveler who spent two weeks there in August said it only rained a handful of times, always torrential but brief, and had more sunny days than wet ones overall. The bigger risk isn't the rain itself but rougher seas - a few posters mentioned island boat trips to Koh Rong getting cancelled on choppy days, so it's worth building a spare day into any island-hopping plan.
Forum posters describe February as comfortably inside Cambodia's dry season, with beaches around Sihanoukville generally clean and calm this time of year. Posters are candid, though, that the country's tropical climate means even peak dry season isn't fully rain-free - localized afternoon or evening showers and brief thunderstorms remain possible, following a common daily pattern of a sunny morning giving way to clouding and rain later in the day. Posters treat this as a minor, short-lived interruption rather than a reason to avoid the period, with February still ranking among the better months for beach time on this coast.
Add your own note from Sihanoukville's card on the map.
Sihanoukville climate normals — March
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Sihanoukville in March
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.
BusyDry season, school holidays in 2 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Sihanoukville'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 weatherSihanoukville's weather peaks December–February, best around January.
Best weatherFair weatherToughest weather
What's on in Sihanoukville in March
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Dry season
15 Nov – 30 Apr · usuallyCrowdedCalm water and reliable crossings to Koh Rong and Koh Rong Sanloem, which is what most people are actually here for. The mainland beaches are a building site by comparison.
Nearby, and something's on
Within 300 km of Sihanoukville — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Sihanoukville?
Sihanoukville in March — FAQ
- Is March a good time to visit Sihanoukville?
- March in Sihanoukville: sweltering, rainy — fine if you can take 37°C afternoons. It ranks #4 of 12 months for Sihanoukville on SeasonMap's comfort score (85/100).
- What is the weather like in Sihanoukville in March?
- In March, Sihanoukville averages a daily high of 30.9°C and a low of 25.9°C, with about 90.6 mm of rain over roughly 16.8 rainy days.
- What is the air quality in Sihanoukville in March?
- Sihanoukville has a mean US Air Quality Index of about 63 in March.
Within 300 km: Phu Quoc's Dry season around 15 Nov – 30 Apr, and Phnom Penh's Dry season around 15 Nov – 30 Apr.