Sai Kung in Winter
In winter (December, January and February), Sai Kung sees average daytime highs around 19°C and overnight lows near 14°C, with 86 mm of rain over about 14 wet days across the season. It is the coldest season of the year and the driest season of the year.
Across winter, daytime highs hold fairly steady around 19°C. The sky is clear or mostly clear about 39% of the time across winter, and the air most often feels dry.
Winter is Sai Kung's best season of the year to visit on our travel score. For the whole year in context, see Sai Kung's year-round climate.
- Avg daytime high
- 19°C
- coldest season of the year
- Avg overnight low
- 14°C
- Rainfall
- 86 mm
- 14 wet days
- Avg wind
- 13 km/h
- Travel score
- 6.8
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Sai Kung in Winter
Across winter, daytime highs hold fairly steady around 19°C.
A typical winter day in Sai Kung reaches about 19°C and drops to 14°C overnight. The warmest of the three months is December, the coolest January.
How winter really feels in Sai Kung
Once humidity and wind are folded in, winter brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
winter sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Sai Kung weather by month
How the three winter months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 18° / 13° | 24 | 4 | 10.8 | 6.8 |
| Feb | 19° / 14° | 34 | 6.3 | 11.2 | 6.4 |
| Mar | 21° / 17° | 68 | 10.1 | 11.8 | 6.3 |
| Apr | 25° / 21° | 123 | 14.1 | 12.5 | 5.9 |
| May | 28° / 24° | 229 | 20 | 13.1 | 4.5 |
| Jun | 30° / 26° | 314 | 23.8 | 13.3 | 3.2 |
| Jul | 31° / 27° | 243 | 22.9 | 13.2 | 3.1 |
| Aug | 31° / 27° | 308 | 23.9 | 12.8 | 3.1 |
| Sep | 30° / 26° | 203 | 17 | 12.1 | 4.2 |
| Oct | 27° / 23° | 64 | 6.9 | 11.5 | 7.0 |
| Nov | 24° / 19° | 36 | 4.9 | 10.9 | 8.0 |
| Dec | 20° / 15° | 29 | 3.9 | 10.7 | 7.3 |
Cloud cover in Winter
The sky is clear or mostly clear about 39% of the time across winter.
Chance of precipitation in Winter
Sai Kung gets around 86 mm of rain over 14 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 13 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 10 h 42 min in early December to 11 h 30 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 3.4 kWh/m².
Hazard calendar for Sai Kung
In winter, Sai Kung overlaps its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Sai Kung sits in the Pacific typhoon belt; the season peaks July–October.
Sai Kung's monsoon runs May–September, when most of the year's rain falls.
Is winter a good time to visit Sai Kung?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a reasonable time to visit Sai Kung for sightseeing.
What to pack for Sai Kung in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, Sai Kung sees daytime highs around 19°C and nights near 14°C. Little to plan around — just the basics. About 14 days see rain.
Sea temperature near Sai Kung in Winter
The nearest coast averages about 20°C across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in July at about 29°C and coldest in January near 20°C.
It's comfortable for a long swim from Feb 23 to Jan 5 — about 10.4 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 20 | 20 | 21 | 23 | 26 | 28 | 29 | 29 | 28 | 27 | 24 | 21 |
| Comfort | Cool | Cool | Refreshing | Refreshing | Warm | Warm | Tropical | Tropical | Tropical | Warm | Refreshing | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 20 | Cool |
| Feb | 20 | Cool |
| Mar | 21 | Refreshing |
| Apr | 23 | Refreshing |
| May | 26 | Warm |
| Jun | 28 | Warm |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 28 | Tropical |
| Oct | 27 | Warm |
| Nov | 24 | Refreshing |
| Dec | 21 | Refreshing |
UV index in Sai Kung in Winter
Clear-sky midday UV across winter averages around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Sai Kung peaks around July 13 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 6 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 6 | 8 | 9 | 9 | 10 | 12 | 12 | 11 | 10 | 8 | 7 | 6 |
| Level | High | Very high | Very high | Very high | Very high | Extreme | Extreme | Extreme | Very high | Very high | High | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 6 | High |
| Feb | 8 | Very high |
| Mar | 9 | Very high |
| Apr | 9 | Very high |
| May | 10 | Very high |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 11 | Extreme |
| Sep | 10 | Very high |
| Oct | 8 | Very high |
| Nov | 7 | High |
| Dec | 6 | High |
Air quality in Sai Kung in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in Sai Kung is worst in January — around 183 µg/m³ PM2.5 (very unhealthy), about 2.5× the cleanest month (July, 73 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 183 | 175 | 165 | 149 | 115 | 83 | 73 | 85 | 119 | 127 | 157 | 156 |
| Level | Very unhealthy | Very unhealthy | Very unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Very unhealthy | Very unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 183 | Very unhealthy |
| Feb | 175 | Very unhealthy |
| Mar | 165 | Very unhealthy |
| Apr | 149 | Unhealthy |
| May | 115 | Unhealthy |
| Jun | 83 | Unhealthy |
| Jul | 73 | Unhealthy |
| Aug | 85 | Unhealthy |
| Sep | 119 | Unhealthy |
| Oct | 127 | Unhealthy |
| Nov | 157 | Very unhealthy |
| Dec | 156 | Very unhealthy |
Where is Sai Kung?
Sai Kung sits at 22.4°N, 114.3°E, 54 m above sea level, in Hong Kong. The nearest listed city is Ma On Shan, 4.0 km away.
Topography around Sai Kung
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sai Kung.
Within 3 km, the terrain around Sai Kung has large variations in elevation — a maximum elevation change of 629 m around an average of 126 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 941 m; within 80 km, large variations in elevation — a maximum elevation change of 1,012 m.
The land around Sai Kung is covered by trees (65%) and water (27%) within 3 km, trees (47%) and water (40%) within 16 km, and water (59%) and trees (26%) within 80 km.
Hong Kong travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type D / G / M
- 220 V · 50 Hz
- Prices
- ≈ 71% of US
- price level, 2025
- GDP per capita
- $56,983
- 2025
- Happiness
- 5.6 / 10
- World Happiness, 2025
- Safe drinking water
- 100%
- of population, 2024
- Homicide rate
- 0.4
- per 100k, 2023
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 538
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Sai Kung (22.3833°, 114.2667°, elevation 54 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.