Weather in Hong Kong in March

How March compares

March is the 9th warmest month of the year in Hong Kong and ranks 48th of 134 destinations we compare for March - see where else is hot in March. Against London's average high of 10.5°C in March, Hong Kong is 11.9°C warmer by day and 14.4°C warmer at night.

Daytime and night-time in March

The typical March day in Hong Kong peaks at 22.4°C, but that is an average: the warmest 10% of days reach 25.7°C or more. Roughly 1 in 6 days top 25°C. Nights average 17.7°C; one night in ten drops to 13.9°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest March day here reached 28.3°C (2000-03-28) and the coldest night 7.0°C (2006-03-01).

Rain in March

Wet (more than 8 rainy days): about 10 days with 1 mm or more, 71 mm in total. Year to year it varies a lot - the wettest March was 2019 with 200 mm, the driest 2015 with 18 mm. Humidity averages 82%.

Sea temperature in March

The sea averages 20.3°C - bracing (18-22°c). Depending on the year it ranges from 19.7°C to 21.0°C. For the warmest sea here, come in August (28.5°C).

Sunshine and daylight

Around 3.2 hours of sunshine a day (estimated from cloud cover), 11.9 hours of daylight: the sun rises about 06:32 and sets about 18:32 local time in mid-March. Average cloud cover is 73%.

Is March a good time to visit Hong Kong?

March is not the strongest month here: warm days and frequent rain. The best months for Hong Kong on our scoring are November, October, September; months averaging 25°C or more: Apr, May, Jun, Jul, Aug, Sep, Oct.

Warm days, but keep a layer handy

Light clothing should work well during warmer parts of the day, but packing only for summer would be a mistake. The warmer days can reach around 26°C or more, while colder nights can drop to around 14°C or below. Bring a light jumper or jacket for evenings and cooler spells, alongside breathable tops for daytime use. Humidity averages 82%, so the air can feel damp despite the moderate temperatures. March suits travellers who prefer walking without intense heat; on warmer afternoons, you may still appreciate a break from being outdoors. Layers give you more flexibility than a suitcase built entirely around shorts and T-shirts.

Expect cloud, allow for rain and treat swimming as optional

Warm does not mean consistently sunny here in March. There are about 3.2 hours of sunshine within 11.9 hours of daylight, so expect plenty of time outdoors without necessarily seeing much sun. Carry a compact umbrella or light waterproof, and leave room to move outdoor plans around when rain arrives. The sea averages around 20°C, which is bracing rather than comfortably warm. Swimming may appeal if you tolerate cooler water, but this is not a strong choice for a holiday centred on long, leisurely swims. For a city stay, the balance is more favourable: mild air temperatures, with cloud and wet weather as the main compromises.