AI-generatedSihanoukville at a glance
- Best time
- Dec – Feb
- Warmest month
- Apr · 32°
- Warmest sea
- May · 30.6°
- Sunshine a year
- 2,040 h
- Rain a year
- 3,292 mm
- Climate
- Tropical
- Time zone
- UTC+7
- Elevation
- 6 m
Climate in Sihanoukville
Sihanoukville has a tropical climate: it is warm all year round, and the seasons differ mainly in how much rain falls. April is the warmest month with average highs of 32 °C, while September is the coolest at 29 °C. With around 2,040 hours of sunshine a year, Sihanoukville is moderately sunny; February is the sunniest month with 7.1 hours a day.
Holiday weather through the year
Best time to visit Sihanoukville
The best time to visit Sihanoukville is from December to February. For a beach holiday – sea from 21 °C, warm and mostly dry – go from December to February. The rainy season is from May to October; the wettest month is July with 510 mm.
Sihanoukville through the seasons
How the weather changes over the seasons, with averages for each.
Sihanoukville in the dry season
Nov – Apr
Good
- 31–32 °C by day
- Sea 29 °C
- 6.8 h of sun a day
- 86 rainy days in all
Sihanoukville in the rainy season
May – Oct
Good
- 29–31 °C by day
- Sea 30 °C
- 4.4 h of sun a day
- 175 rainy days in all
Which month for what?
Beach & swimming
Dec – Feb
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
No month
15–28 °C and not too much rain
Rainy months
May – Oct
Rainy season or more than 12 rainy days
Find your perfect month
Tell us what you like and we rate every month in Sihanoukville for you.
Your best months: December – February
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Good
Best time to visit: December – February
Where to go in OctoberSea temperature in October
Keep in mindFrequent rain
A typical day in October
- Morning, 08:00: about 26°
- Midday, 13:00: about 30°
- Afternoon, 16:00: about 29°
- Evening, 20:00: about 26°
- Night, 23:00: about 25°
05:5417:49
Warm enough for a T-shirt in the evening.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 05:41–06:22 · evening 17:21–18:02
- Blue hour
- Morning 05:33–05:41 · evening 18:02–18:10
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
October in Sihanoukville compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs stay at about 30° from start to end. The days get 0.3 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 30° | 30° |
| Night-time low | 23° | 23° |
| Sea | 29° | 29° |
| Daylight | 12.0 h | 11.8 h |
What is the weather like in Sihanoukville in October?
In October, Sihanoukville is hot: daytime highs average 30 °C, and even at night it stays warm at around 23 °C. The sea averages 29.2 °C – almost as warm as a bath. Expect around 4.5 hours of sunshine a day. It is the rainy season: rain falls on about 28 days, totalling 405 mm. On about 18 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, October is a good month for a holiday in Sihanoukville.
More details for October
- Daylight
- 11 h 54 min05:54 – 17:49
- UV index
- 12 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 9 km/haverage daily peakAll months
- Cloud cover
- 87 %on averageAll months
- Hot days
- 18 days30 °C or moreAll months
- Time zone
- UTC+7offset from UTC
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %100 %
- Sunshineweight 20 %25 %
- Few rainy daysweight 20 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Insect repellent
- Rain jacket or umbrella
Compare two months in Sihanoukville
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
January has the better holiday weather in Sihanoukville: score 87 against 65. In January, days are 1 °C warmer than in October. The sea is 1 °C cooler in January. January has 20 fewer rainy days. The sun shines 2 hours longer a day in January.
| Month | October | January |
|---|---|---|
| Holiday weather score | 65 | 87better |
| Daytime high | 30° | 31° |
| Night-time low | 23° | 23° |
| Sea | 29.2° | 28.2° |
| Sunshine | 4.5 h | 6.9 hbetter |
| Rainy days | 28 | 8better |
| Rainfall | 405 mm | 48 mmbetter |
| Muggy days | 31 | 28better |
Based on the climate averages 1996–2025.
Sihanoukville month by month
The typical weather for every month at a glance.
87January31° · Sea 28° · 6.9 h
In January, Sihanoukville is hot: daytime highs average 31 °C, and even at night it stays warm at around 23 °C. The sea averages 28.2 °C – lovely and warm for swimming. The sun shines for around 6.9 hours a day. Rain falls on about 8 days, adding up to 48 mm. On about 24 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, January is an excellent month for a holiday in Sihanoukville.
Sihanoukville in January83February32° · Sea 29° · 7.1 h
In February, Sihanoukville is hot: daytime highs average 32 °C, and even at night it stays warm at around 23 °C. The sea averages 28.5 °C – lovely and warm for swimming. The sun shines for around 7.1 hours a day. Rain is frequent, with about 10 rainy days and 51 mm in total. On about 25 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, February is an excellent month for a holiday in Sihanoukville.
Sihanoukville in February69March32° · Sea 29° · 7.1 h
In March, Sihanoukville is hot: daytime highs average 32 °C, and even at night it stays warm at around 24 °C. The sea averages 29.3 °C – almost as warm as a bath. The sun shines for around 7.1 hours a day. It rains often – on about 17 days, adding up to 118 mm. On about 30 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, March is a good month for a holiday in Sihanoukville.
Sihanoukville in March66April32° · Sea 30° · 6.8 h
In April, Sihanoukville is hot: daytime highs average 32 °C, and even at night it stays warm at around 25 °C. The sea averages 30.4 °C – almost as warm as a bath. The sun shines for around 6.8 hours a day. It rains often – on about 23 days, adding up to 198 mm. On about 29 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, April is a good month for a holiday in Sihanoukville.
Sihanoukville in April65May31° · Sea 31° · 5.1 h
In May, Sihanoukville is hot: daytime highs average 31 °C, and even at night it stays warm at around 25 °C. The sea averages 30.6 °C – almost as warm as a bath. Expect around 5.1 hours of sunshine a day. It is the rainy season: rain falls on about 29 days, totalling 349 mm. On about 25 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, May is a good month for a holiday in Sihanoukville.
Sihanoukville in May65June30° · Sea 30° · 4.5 h
In June, Sihanoukville is hot: daytime highs average 30 °C, and even at night it stays warm at around 24 °C. The sea averages 29.9 °C – almost as warm as a bath. Expect around 4.5 hours of sunshine a day. It is the rainy season: rain falls on about 28 days, totalling 421 mm. On about 16 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, June is a good month for a holiday in Sihanoukville.
Sihanoukville in June64July30° · Sea 29° · 4.1 h
In July, Sihanoukville is hot: daytime highs average 30 °C, and even at night it stays warm at around 24 °C. The sea averages 29.3 °C – almost as warm as a bath. Expect around 4.1 hours of sunshine a day. It is the rainy season: rain falls on about 30 days, totalling 510 mm. On about 14 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, July is a good month for a holiday in Sihanoukville.
Sihanoukville in July64August30° · Sea 29° · 4.3 h
In August, Sihanoukville is hot: daytime highs average 30 °C, and even at night it stays warm at around 23 °C. The sea averages 29.0 °C – almost as warm as a bath. Expect around 4.3 hours of sunshine a day. It is the rainy season: rain falls on about 30 days, totalling 477 mm. On about 13 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is a good month for a holiday in Sihanoukville.
Sihanoukville in August63September29° · Sea 29° · 3.9 h
In September, Sihanoukville is hot: daytime highs average 29 °C, and even at night it stays warm at around 23 °C. The sea averages 29.0 °C – almost as warm as a bath. The sun is scarce, with only about 3.9 hours a day. It is the rainy season: rain falls on about 29 days, totalling 488 mm. On about 11 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, September is a good month for a holiday in Sihanoukville.
Sihanoukville in September65October30° · Sea 29° · 4.5 h
In October, Sihanoukville is hot: daytime highs average 30 °C, and even at night it stays warm at around 23 °C. The sea averages 29.2 °C – almost as warm as a bath. Expect around 4.5 hours of sunshine a day. It is the rainy season: rain falls on about 28 days, totalling 405 mm. On about 18 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, October is a good month for a holiday in Sihanoukville.
Sihanoukville in October70November31° · Sea 29° · 6.0 h
In November, Sihanoukville is hot: daytime highs average 31 °C, and even at night it stays warm at around 23 °C. The sea averages 29.2 °C – almost as warm as a bath. Expect around 6.0 hours of sunshine a day. It rains often – on about 18 days, adding up to 167 mm. On about 23 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, November is a good month for a holiday in Sihanoukville.
Sihanoukville in November85December31° · Sea 29° · 6.8 h
In December, Sihanoukville is hot: daytime highs average 31 °C, and even at night it stays warm at around 23 °C. The sea averages 28.6 °C – lovely and warm for swimming. The sun shines for around 6.8 hours a day. Rain is frequent, with about 10 rainy days and 60 mm in total. On about 23 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, December is an excellent month for a holiday in Sihanoukville.
Sihanoukville in DecemberClimate in detail
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Sihanoukville
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Warm 20–24°
- Hot 24° and more
- muggy month (15+ muggy days)
WarmOctober: nights around 23°. Tropical nights: a fan or air conditioning helps. Muggy on about 31 days (dew point 18 °C or more).
The coolest nights are in January (23°), the warmest in April (25°). Nights stay tropical all year (20 °C and more), so a room with air conditioning or at least a fan pays off. It is muggy (dew point 18 °C or more) all year, on about 359 days a year.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 87 | 31° | 23° | 28.2° | 6.9 h | 8 | 48 |
| FebruaryFeb | 83 | 32° | 23° | 28.5° | 7.1 h | 10 | 51 |
| MarchMar | 69 | 32° | 24° | 29.3° | 7.1 h | 17 | 118 |
| AprilApr | 66 | 32° | 25° | 30.4° | 6.8 h | 23 | 198 |
| MayMay | 65 | 31° | 25° | 30.6° | 5.1 h | 29 | 349 |
| JuneJun | 65 | 30° | 24° | 29.9° | 4.5 h | 28 | 421 |
| JulyJul | 64 | 30° | 24° | 29.3° | 4.1 h | 30 | 510 |
| AugustAug | 64 | 30° | 23° | 29.0° | 4.3 h | 30 | 477 |
| SeptemberSep | 63 | 29° | 23° | 29.0° | 3.9 h | 29 | 488 |
| OctoberOct | 65 | 30° | 23° | 29.2° | 4.5 h | 28 | 405 |
| NovemberNov | 70 | 31° | 23° | 29.2° | 6.0 h | 18 | 167 |
| DecemberDec | 85 | 31° | 23° | 28.6° | 6.8 h | 10 | 60 |
Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
10.61° N, 103.53° E · 6 m · Asia/Phnom_Penh
Sea temperature in Sihanoukville
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 28.7 – 29.8 °C
Swimming season: all year
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Sihanoukville ranges from 28.2 °C in January to 30.6 °C in May. At 20 °C and more, the sea is warm enough for swimming all year round.
The sea warms up slowly: it is warmest in May, while the air already peaks in April. The sea temperature varies from year to year: in May, eight out of ten years were between 29.9 and 31.4 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 28.2° | 27.5° | 29.0° | warm |
| FebruaryFeb | 28.5° | 27.8° | 29.1° | warm |
| MarchMar | 29.3° | 28.8° | 29.9° | very warm |
| AprilApr | 30.4° | 29.8° | 30.9° | very warm |
| MayMay | 30.6° | 29.9° | 31.4° | very warm |
| JuneJun | 29.9° | 29.2° | 30.5° | very warm |
| JulyJul | 29.3° | 28.6° | 30.0° | very warm |
| AugustAug | 29.0° | 28.5° | 29.6° | very warm |
| SeptemberSep | 29.0° | 28.5° | 29.6° | very warm |
| OctoberOct | 29.2° | 28.7° | 29.8° | very warm |
| NovemberNov | 29.2° | 28.8° | 29.8° | very warm |
| DecemberDec | 28.6° | 28.0° | 29.4° | warm |
Sunshine hours in Sihanoukville
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 4.5 of 11.9 hours of daylight in Sihanoukville, 38 % of the daylight hours.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
Rain in Sihanoukville: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Sihanoukville has about 28 rainy days with 405 mm of rain in total.
UV index in Sihanoukville
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 12 · extremeAvoid the midday sun; SPF 50+, covering clothes, hat and sunglasses.
The sun is strongest in April (UV 13).
Minutes until sunburn in October
- Very fair skin
- about 10 min
- Fair skin
- about 15 min
- Light brown skin
- about 20 min
- Olive skin
- about 25 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen the time, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Wind and clouds in Sihanoukville
How breezy and how cloudy Sihanoukville is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Sihanoukville typically peaks at 9 km/h during the day: Beaufort 2, light breeze or less.
Breezy months for windsurfing and kiting
The daily breeze rarely reaches Beaufort 4 (20 km/h), so wind sports depend on single windy days.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 87 % of the sky over Sihanoukville: mostly overcast, with about 4.5 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat and humidity in Sihanoukville
How often the day gets hot in Sihanoukville (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Sihanoukville has about 18 hot days, with an average daytime high of 30 °C: hot and muggy. Plan outdoor activities for the morning and evening, drink a lot and take breaks in the cool.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Planning a trip to Sihanoukville
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Sihanoukville in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Sihanoukville has its best school-holiday weather during the Christmas holidays (score 86) and its weakest during the summer holidays (score 64).
- 67
Easter holidays
Mar – Apr
Good
- 32 °C by day
- Sea 30 °C
- 6.9 h of sun a day
- 21 rainy days a month
- 65
May half-term
May – Jun
Good
- 31 °C by day
- Sea 30 °C
- 5.0 h of sun a day
- 29 rainy days a month
Keep in mind: Frequent rain
- 64
Summer holidays
Jul – Aug
Good
- 30 °C by day
- Sea 29 °C
- 4.2 h of sun a day
- 30 rainy days a month
Keep in mind: Frequent rain
- 65
October half-term
Oct
Good
- 30 °C by day
- Sea 29 °C
- 4.5 h of sun a day
- 28 rainy days a month
Keep in mind: Frequent rain
- 86
Christmas holidays
Dec – Jan
ExcellentBest holidays
- 31 °C by day
- Sea 28 °C
- 6.9 h of sun a day
- 9 rainy days a month
Good for: Beach & swimming
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 12 h 35 min
- Distance
- 10,030 km
- Time zone
- UTC+7
- Jet lag
- About 6 days (6 h east)
Rule of thumb for flying east: for a few days before, go to bed and get up a little earlier, and get plenty of morning light at your destination.
Most routes need a change of planes, which adds time.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Compare & alternatives
Sihanoukville compared
Put Sihanoukville side by side with another destination.
Sihanoukville vs Phu Quoc (Duong Dong)
In October the holiday weather in Sihanoukville and Phu Quoc (Duong Dong) is about equally good (score 65 vs 66). During the day Phu Quoc (Duong Dong) is 1 °C cooler than Sihanoukville. The sea is about equally warm.
| in October | Sihanoukville | Phu Quoc (Duong Dong) |
|---|---|---|
| Holiday weather score | 65 | 66 |
| Daytime high | 30° | 29° |
| Sea | 29° | 29° |
| Sunshine | 5 h | 5 h |
| Rainy days | 28 | 26 |
| Best time | Dec – Feb | Dec – Mar |
Through the year
Cambodia in October: the best places
In October, Sihanoukville ranks 1 of 4 destinations in this country.
- SihanoukvilleThis page30°29°65
- 2Siem Reap (Angkor)31°33
- 3Battambang32°29
- 4Phnom Penh32°28
Near Sihanoukville
Other destinations close by.
Places with a climate like Sihanoukville
Destinations whose weather through the year is closest to Sihanoukville's – good alternatives.
Frequently asked questions about Sihanoukville
When is the best time to visit Sihanoukville?
The best time to visit Sihanoukville is from December to February. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Sihanoukville?
The sea temperature in Sihanoukville ranges from 28.2 °C in January to 30.6 °C in May. At 20 °C and more, the sea is warm enough for swimming all year round.
Can you swim in Sihanoukville in October?
Yes. In October the sea averages 29.2 °C – almost as warm as a bath.
What is the warmest month in Sihanoukville?
April is the warmest month, with average highs of 32 °C and nights around 25 °C. September is the coolest month at 29 °C.
When does it rain most in Sihanoukville?
The rainy season is from May to October; the wettest month is July with 510 mm. The driest month is January with 48 mm.
How many hours of sunshine does Sihanoukville get?
Sihanoukville gets around 2,040 hours of sunshine a year. The sunniest month is February with 7.1 hours a day; in September there are 3.9 hours a day.
What time zone is Sihanoukville in?
Sihanoukville is on UTC+7 all year.
How long is the flight from London to Sihanoukville?
A nonstop flight from London to Sihanoukville takes about 12 h 35 min, for a straight-line distance of about 10,030 km. Most routes need a change of planes, which adds time.
Which school holidays are best for Sihanoukville?
Sihanoukville has its best school-holiday weather during the Christmas holidays (score 86) and its weakest during the summer holidays (score 64). Holiday ratings (0–100): Easter holidays 67, May half-term 65, summer holidays 64, October half-term 65, Christmas holidays 86.