Climate and monthly weather forecastSai Wan, Hong Kong

The climate of Sai Wan

Sai Wan, Hong Kong finds itself in the Humid subtropical zone according to the Köppen climate classification - represented by the symbol Cwa. This particular zone is characterized by mild, wet winters and warm to hot summers with high humidity. In Sai Wan, temperatures exhibit a pronounced cycle, fluctuating from a mild 15°C (59°F) in February to a sultry 30.5°C (86.9°F) in August.

Humidity levels are quite high throughout the year, maintaining a steady range from 70% in December to 84% in May, contributing to the overall warm, moist climate. Precipitation is another key element of Sai Wan's weather. The area sees a stark shift between relatively drier winters and an extensive monsoon season. Rainfall rises steadily from 25mm (0.98") in January, peaking at 223mm (8.78") in August before receding again to 23mm (0.91") in December. This has a corresponding effect on the number of rainfall days - these escalate from 12.6 days in January to a peak of 26.8 in July.

Despite the regular rainfall, sunlight is not scarce. Values range from 10.9 daylight hours in January to a maximum of 13.5 hours in June. However, actual sunshine duration hovers between 5.3 hours per day in March and reaches up to 10 hours in July. As for UV index, it goes from a moderate 4 in January and February to a high of 7 during the period between May to September. Cloud cover shows a moderate fluctuation from 35% in September and October to 61% in March.

Wind speed varies within small brackets throughout the year, with an average of 12.4km/h (7.7mph) in August and reaching 16km/h (9.9mph) in December, while visibility remains consistently high at 9-10km (-6.2mi).

The best time to visit Sai Wan

Selecting the optimal time for a visit to Sai Wan is closely tied to the visitor's personal preferences in terms of weather. For those who enjoy warmer climate and long days, May through September can be considered favourable. With temperatures ranging from 24.5°C (76.1°F) to 30.5°C (86.9°F) and daylight duration extending to 13.5 hours, these months offer ample opportunity for outdoor activities. The UV index does climb to 7 during this time, so sun protection measures are advisable.

The worst time to visit Sai Wan

Converse to the best visiting period, the least conducive time to tour Sai Wan would be the winter months from November to January. Although temperatures remain mild at 19.6°C (67.3°F) to 23.9°C (75°F), the shorter days - 10.8 to 11.1 daylight hours - might not be appealing to all. Additionally, these months record the lowest sunshine hours, declining to 5.4 to 5.7 per day.

Spring weather in Sai Wan

Spring, the transitional season from March to May, sees a steady rise in various weather parameters. The temperature climbs from 21.7°C (71.1°F) to 27.7°C (81.9°F), while daylight grows from 12 to 13.2 hours. The UV index also escalates to moderate levels. Rainfall, however, witnesses a significant jump during this period, from 44mm (1.73") to 171mm (6.73"), accompanying a rise in relative humidity from 80% to 84%.

Summer weather in Sai Wan

The summer months from June through August present the warmest and longest days in Sai Wan. Temperatures peak at 30.5°C (86.9°F), and daylight lasts a substantial 13.4 to 13.5 hours. Despite the rise in temperature, the relative humidity drops to 80% to 83%. Rainfall intensity also increases, culminating in 206mm (8.11") to 223mm (8.78"). Simultaneously, the UV index hits 7, indicating a high level of UV radiation.

Autumn weather in Sai Wan

Autumn in Sai Wan, from September through November, sees a gradual decline in weather parameters from their summer peaks. Temperatures drop from 29.6°C (85.3°F) to 23.9°C (75°F), while daylight hours reduce to 12.3 to 11.1. The rainfall also subsides, with the amount falling to 71mm (2.8") in October. Additionally, relative humidity reduces to a range from 75% to 77%.

Winter weather in Sai Wan

Winters in Sai Wan, occurring from December to February, are mild with appreciable variations in weather factors. Temperatures range between 15°C (59°F) and 19.7°C (67.5°F), while daylight hours limit between 10.9 and 11.4. Relative humidity reduces to its lowest annual level at 70% -73% in December and January, that accompanies the least rainfall of 23mm (0.91") and 25mm (0.98") respectively. The UV index also stays at the lowest annual level of 4 during these months.

Weather in January

Venturing into the new year, January in Sai Wan, Hong Kong, presents mild summer conditions. Temperatures do not fluctuate dramatically, pastoral warmth spreads across the city. Higher humidity levels give a hint of sweatiness, yet it's a reasonable amount of moisture. Weather in January »

Weather in February

Notably different from January, February's weather is a momentous increase in rainfall, humid afternoons, and ever slightly warmer temperatures in Sai Wan. These conditions encourage an uptick in indoor activities. Despite the increasing humidity, this month is not unmanageably humid. Weather in February »

Weather in March

March transitions into notable warmth - a gentle nudge towards summer in Sai Wan. There are more humid afternoons coupled with vivid microbursts of rain through the month, symbolizing a distinct change in city's atmosphere. March stands out for its increase in rainfall, ushering in a period of revitalization for nature. Weather in March »

Weather in April

A significant shift arises in April's weather as Sai Wan bathes in the early summer's glow. The clear skies and calm breezes experienced in March are replaced with more humid afternoons and heavier rainfall. Nature now mirrors a vibrant portrait, with blooming flora painting Sai Wan in an array of colors. Weather in April »

Weather in May

May introduces higher temperatures and abundant sunshine in Sai Wan, Hong Kong. Despite the rise in humidity and substantial rainfall, the city retains its allure. The city becomes a vibrant relay of changing weather patterns and ever-increasing temperatures. Weather in May »

Weather in June

As summertime begins in earnest, June sees the atmosphere in Sai Wan turning increasingly tropical. The city is filled with a pulsating energy, an echo of the heated environment. While the rising temperatures might be daunting for the uninitiated, the city natives find a rhythmic sway in their step. Weather in June »

Weather in July

July takes the baton from June, continuing the warm summer extravaganza in Sai Wan. This month sees the city dipping into languid afternoon siestas under the balmy weather. The marine cityscape resonates with the high-pitched call of seagulls, their symphony in perfect cadence with the sizzling weather. Weather in July »

Weather in August

The sultry August weather takes center stage in Sai Wan, with temperatures maintaining their summer vibrancy. The city pulsates with the steady throb of tropical heat, interspersed with bold bouts of rainfall. Despite fatigue from the lengthened summer, the city entertains with a plethora of summer events. Weather in August »

Weather in September

September starts to slowly wind down from the peak of summer in Sai Wan. The city sees a fusion of late summer heat and the early arrival of autumnal cool breezes. Despite the first rustle of fallen leaves, afternoons remain sweltering, and the city's general atmosphere carries a residual humidity. Weather in September »

Weather in October

Sai Wan welcomes October with the gentle onset of autumn, underscoring its diverse climatic experience. This month, packed with autumnal hues, offers welcome change from the tropical summer of the previous months. The warmth starts to wane, providing a respite to the city inhabitants. Weather in October »

Weather in November

November dips deeper into autumn, with Sai Wan slowly preparing for winter's arrival. The city undergoes subtle changes in its landscape - the leaves start to wilt, and the sun sets slightly earlier, painting the cityscape in a warm, orange hue. Weather in November »

Weather in December

December brings the year to a close with a mild wisp of winter in Sai Wan. The month sees a noticeable decrease in temperature and rainfall. Winter in Sai Wan is far from harsh, presenting a rather subtle, softer version of the season. Weather in December »