Surviving the Rainy Season in Hong Kong: What to Wear, Do, and Avoid

When Does It Rain in Hong Kong?

Hong Kong's rainy season runs roughly from April through September, with the heaviest rainfall in May, June, and August. During these months, the city receives around 80% of its annual rainfall — approximately 2,400mm total, which is more than London receives in three years. The rain is not a gentle drizzle. It comes in sudden, intense downpours that can drop 50mm or more in an hour.

If you have just moved to Hong Kong, your first rainy season will be a revelation. Here is how to handle it.

Understanding the Warning System

The Hong Kong Observatory operates a colour-coded warning system that you need to understand:

Rainstorm Warnings

• Amber — Heavy rain. Be alert. No significant disruption expected, but carry an umbrella.
• Red — Very heavy rain (more than 50mm/hour expected). Schools may dismiss early. Flooding possible in low-lying areas. Employers should allow flexible working.
• Black — Extremely heavy rain (more than 70mm/hour). Schools are closed. Employees should not travel to work. Significant flooding risk. Stay indoors if possible.

Typhoon Signals

• T1 — A tropical cyclone is within 800km. Be aware but carry on normally.
• T3 — Strong winds expected. Some ferries may be suspended. Horse racing at Happy Valley continues.
• T8 — The big one. Gale force winds. Everything shuts down — offices, schools, public transport, shops. Stock up on food and water before the signal goes up. Employers are required to release staff at least two hours before T8 is hoisted.
• T9 and T10 — Hurricane force winds. Stay indoors. Tape windows in older buildings. T10 is rare (only raised a handful of times per decade) but extremely serious.

Download the Hong Kong Observatory app (MyObservatory) — it sends push notifications for all warnings and is the most reliable source of weather information.

What to Wear

Footwear

Regular shoes and leather footwear will be ruined. During rainy season, consider:

• Waterproof shoes or rain boots — Brands like Hunter, Aigle, and Palladium have styles that work for both commuting and casual wear. Many Hong Kong professionals keep waterproof shoes at the office for rainy days.
• Quick-drying sandals — Teva or Birkenstock EVA sandals are practical for casual days. Your feet will get wet regardless — better to have shoes that handle it.
• Avoid suede and untreated leather — the humidity and rain will destroy them.

Clothing

• Light rain jacket — Not a heavy waterproof. Hong Kong rain is warm (25-33°C), so breathability matters more than insulation. Uniqlo's Blocktech parkas are popular and inexpensive.
• Quick-dry fabrics — Avoid cotton, which stays damp and uncomfortable. Synthetic fabrics or merino wool dry faster.
• Bring a change of clothes — if you are commuting to an office, keep a spare shirt at work. Getting drenched between the MTR exit and your building entrance is common.

Umbrellas

A compact umbrella is essential. The small telescopic ones are fine for drizzle but inadequate for Hong Kong downpours. Invest in a sturdy, wind-resistant umbrella — you will use it almost daily for months. 7-Eleven and convenience stores sell cheap umbrellas for HK$30-50, but they will not survive more than a few storms.

Getting Around

The MTR Is Your Friend

The MTR (subway) system is climate-controlled, reliable, and unaffected by rain. During heavy rain, it is by far the best way to travel. Plan routes that minimise walking between MTR exits and your destination.

Elevated Walkways and Covered Paths

Hong Kong has an extensive network of covered walkways connecting MTR stations, shopping malls, and office buildings. In Central, you can walk from the MTR through IFC, Exchange Square, the covered escalator system, and connecting bridges without ever going outside. Learn these routes — they are lifesavers during downpours.

Buses and Trams

Buses continue running in all but the most extreme conditions. Trams also operate normally unless T8 is raised. However, waiting at open bus stops and tram stops in heavy rain is unpleasant — plan accordingly.

Taxis

During heavy rain, demand for taxis spikes and availability drops. Expect long waits and difficulty hailing. Apps like HKTaxi help but are also overwhelmed during storms. If you see rain forecast for the evening, book transport early.

Indoor Activities for Rainy Days

Rainy days are perfect for exploring Hong Kong's excellent indoor attractions:

• M+ Museum (West Kowloon) — Spend hours exploring the galleries. Free general admission.
• Hong Kong Palace Museum — Adjacent to M+, with rotating exhibitions from Beijing's Palace Museum.
• Hong Kong Science Museum and History Museum (Tsim Sha Tsui) — Both are engaging and air-conditioned. Free on Wednesdays.
• Shopping malls — Hong Kong's malls are practically designed for rainy days. Elements, Harbour City, IFC, Pacific Place, and Times Square offer shopping, dining, and entertainment under one roof.
• Cinema — Hong Kong has excellent cinemas including the UA IMAX at MegaBox and MCL Cinemas at various locations. Tickets are around HK$80-130.
• Board game cafes and escape rooms — Scattered throughout Mong Kok and Causeway Bay. Good for groups.
• Spa days — Treat yourself at one of the hotel spas. Many offer rainy day or weekday packages at HK$600-1,500.

Protecting Your Home

• Check window seals — Older buildings often have leaky windows. Report to your landlord or management office before the season starts.
• Buy a dehumidifier — Humidity during rainy season regularly exceeds 90%. A dehumidifier is not a luxury — it prevents mould on clothes, shoes, bags, and walls. Run it daily.
• Use moisture absorbers — Place them in closets, shoe cabinets, and drawers. Available at ParknShop and Wellcome for HK$30-50 per pack.
• Keep windows closed — Obvious but easy to forget. Even brief rain can soak furniture and floors.
• Typhoon preparation — Before T8 signals, secure balcony items, close and lock all windows, tape large glass windows in older buildings, and stock food and water for 24-48 hours.

Health Tips

• Stay hydrated — The heat and humidity are draining even when it rains. Drink water consistently.
• Beware of slippery surfaces — Wet marble and tile floors (common in malls and MTR stations) are dangerously slippery. Walk carefully.
• Dry wet clothes promptly — The humidity means damp clothes will not dry naturally. Use a dryer or hang near air conditioning.
• Watch for flooding — After heavy rain, some streets and underpasses flood. Avoid walking through flood water — it may contain sewage and debris.
• Mosquitoes — Standing water attracts mosquitoes. Use repellent, especially in the evenings, and ensure there is no standing water on your balcony or near your windows.

Hong Kong's rainy season is intense but manageable. The key is preparation — the right gear, the right apps, and the right attitude. The rain makes the city's autumn (October-December) feel like a reward: clear skies, cool air, and some of the best weather anywhere in Asia.