Hong Kong's climate is not kind to new drivers. Between May and September, the city endures a typhoon season and a rainy season that can turn a familiar road into a genuine hazard within minutes. Yet most learners prepare for their driving test on dry, clear days — and are caught off guard the first time they drive in a downpour. Here is what you genuinely need to know.
The Rainstorm Warning System and Your Responsibility
Hong Kong's Hong Kong Observatory issues Rainstorm Warnings — Amber, Red, and Black — as well as Typhoon Signals. These are not just weather alerts; they affect your legal and practical duties on the road.
- Amber Rainstorm Warning: Heavy rain is expected or occurring. You should drive with extra caution, reduce speed, and increase following distance significantly.
- Red Rainstorm Warning: Very heavy rain. Many employers advise staff to stay put. If you are already driving, find a safe place to pull over and wait if visibility drops dangerously.
- Black Rainstorm Warning: Extremely heavy rain. The Transport Department advises the public to avoid unnecessary travel. If you must drive, treat every underpass and low-lying road as a potential flood zone.
New drivers often underestimate how quickly a Black Rainstorm can develop. Do not assume the sky overhead tells the whole story — heavy rain falling kilometres away drains directly into the streets you are driving on.
Wet-Road Technique the Examiner Expects
Even on a dry-weather driving test, Transport Department examiners assess whether your overall vehicle control reflects sound habits. In real wet conditions, those habits become critical.
Increase Your Following Distance
The standard two-second rule taught for dry roads is insufficient in the wet. Aim for at least four seconds of following distance. Wet asphalt — especially in tunnels where oil residue builds up — dramatically extends stopping distances.
Brake Earlier and More Gently
Harsh, late braking is a fault on the driving test and a genuine danger in the rain. Cadence braking or smooth progressive braking helps maintain tyre contact with the road. If your car has ABS, trust it — do not pump the pedal.
Lights On, Even in Daytime
Hong Kong drivers are legally required to switch on headlights when visibility is seriously reduced. In practice, switch them on whenever it is raining heavily enough that you need windscreen wipers running continuously. This makes you visible to others, not just the other way around.
Flooded Roads and Underpasses: Never Guess the Depth
Some of Hong Kong's most dangerous moments for drivers occur at underpasses and low-lying roads that flood rapidly. The rule is simple: if you cannot clearly see the road surface and judge the depth, do not enter. A standard private car can be stalled — or worse, swept — by water as shallow as 30 centimetres.
Look for reference points such as kerb height, road markings, or other vehicles. If in doubt, turn around. No appointment, no destination, is worth a flooded engine or a dangerous situation inside a submerged underpass.
Hydroplaning: Recognising and Recovering
Hydroplaning occurs when your tyres ride on a film of water rather than gripping the road surface. You will feel the steering go unusually light. If it happens:
- Do not brake suddenly or turn the wheel sharply.
- Ease off the accelerator gently.
- Hold the steering wheel straight until you feel grip return.
Worn tyres make hydroplaning far more likely. Check your tread depth regularly — Hong Kong law requires a minimum of 1 mm, but safety experts recommend replacing tyres well before that point.
Build Good Habits Before the Wet Season Hits
The best time to develop safe wet-weather technique is before you are in the middle of a Black Rainstorm on the way to Kowloon. Use quieter roads and daylight drizzle to practise smooth braking, extended following distances, and calm observation.
If you are still preparing for your driving test, SteerClear lets you practise real Transport Department test routes with live scoring, so you arrive on test day already familiar with the road environment — whatever the weather throws at you.
Wet roads are a permanent part of driving in Hong Kong. Treat them with respect from your very first lesson, and they will never catch you off guard.