Sihanoukville weather by month

The best time to visit Sihanoukville is December to February — 92/100 in January, 30°C and 9 rainy days. The best season is the dry season, November to April (84/100 on average).

The worst month is September at 53/100 — sweltering, soaked, clean air. See September →

Updated September 2026 · climate normals from ERA5 reanalysis

Planning the wider trip? Best time to visit Cambodia →

Sihanoukville🇰🇭 Cambodia · Southern Vietnam & Cambodia · Beach92
  1. 92Jan
  2. 90Feb
  3. 85Mar
  4. 78Apr
  5. 63May
  6. 61Jun
  7. 56Jul
  8. 60Aug
  9. 53Sep
  10. 57Oct
  11. 74Nov
  12. 87Dec

Best season: November to April (84/100 on average) · worst September (53/100)

Days
30°C
Nights
25°C
Wet days
9
Sun
10.2 h
Humidity
73%
Daylight
12 h
Sihanoukville, Cambodia
Photo: Him Sann TR · Pexels

Sihanoukville, month by month

Comfort score out of 100 for the kind of trip Sihanoukville is best for, the average high, rainy days and hours of sun a day from the climate normals, and how busy it tends to be.

MonthScoreTierHighRainSunCrowdsOn
Jan92S30°C9 d10 hBusy1
Feb90S30°C9 d11 hBusy1
Mar85A31°C17 d11 hBusy1
Apr78B31°C21 d11 hPeak2
May63C30°C29 d9 hShoulder—
Jun61C29°C28 d9 hShoulder1
Jul56D29°C30 d8 hQuiet1
Aug60C28°C30 d9 hShoulder1
Sep53D28°C29 d7 hQuiet2
Oct57D29°C28 d8 hBusy3
Nov74B29°C19 d9 hPeak2
Dec87A30°C11 d10 hBusy1

What's on in Sihanoukville through the year

Festivals, natural spectacles, holidays and the seasons to watch out for — curated and sourced. The month pages carry the detail.

April
  • Khmer New Year13–16 AprFestival
June
  • Rough island crossings1 Jun – 15 Oct (usually)Season
September
  • Pchum Ben10 Sep – 10 Oct (usually)Festival
October
  • Bon Om Touk25 Oct – 25 Nov (usually)Festival
November
  • Dry season15 Nov – 30 Apr (usually)Season

Everything on in Sihanoukville through the year →

Crowds in Sihanoukville in January

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 6 of the markets that fill it(estimated)

JFMAMJJASOND

Peak crowdsBusyShoulder seasonQuiet

Good to know before you go to Sihanoukville

Real experiences from travellers' own write-ups, quoted with a link to the original.

Safety

A guide to Sihanoukville notes it's generally a safe place to backpack, but petty theft on the beaches is a real and fairly frequent issue, so keeping valuables secured or left at your accommodation rather than out on the sand is worth the extra caution. Their timing tip: the middle of the dry season, November through February, brings daytime temperatures under 30°C, the most comfortable window for spending long stretches on beaches like Ochheuteal or the more laid-back Otres.
Lux Travel DMC · Read the original ↗

Traveller notes on Sihanoukville

What people who have been say about the place — the year-round notes first, then month by month.

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

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