Also known as return tide, it is a meteorological phenomenon in Hong Kong, southern China, and Taiwan when winter transitions to early spring. It occurs when warm air flows into an area that has long been affected by cold air. This warm air interacts with surfaces that are below their dew point temperature, causing condensation to form, such as on walls. Returning to the south is a change in wind direction. It marks that the cold and dry northeast monsoon is replaced, and southerly winds begin to sweep across the region. This change causes moisture to condense, creating a humid environment indoors, which usually occurs from late February to April.

8 Ways To Deal With The Humidity In Hong Kong

• Reduce opening of windows: Open windows with special caution in the morning and evening to reduce the amount of moisture entering the room. Sealing windows facing south and southeast can effectively prevent moisture penetration.
• Electric heaters and electric heating pads: Turn them on one hour before going to bed to preheat the bed, and then remember to turn them off when you go to bed. This can keep your bed dry and warm.
• Dehumidifier: Dehumidifiers are very useful year-round in Hong Kong to help keep the indoor environment dry and comfortable.
• Dehumidifier: Use reusable moisture-absorbing bags, which contain activated carbon to effectively absorb excess moisture and prevent clothing and shoes from getting damp and moldy.
• Warming bag: Warming bag contains activated carbon products, which can keep items dry and odor-free. They can be placed in wardrobes or shoe cabinets.
• Extractor Fan: Turn on the extractor fan while showering to ensure adequate ventilation, which is important to prevent mold and odors in the bathroom.
• 2-in-1 washer and dryer: Humid weather may make it difficult to dry clothes during your trip back to the south. A 2-in-1 washer and dryer can save time and prevent odors in the clothes.
• Diatomaceous Earth: Diatomaceous Earth is a naturally hygroscopic material that can be placed in entryways to help absorb excess moisture while inhibiting mold growth on walls.