Hong Kong has escaped any serious effects after the first storm of the typhoon season passed just east of the territory.
Merbok made landfall over Mirs Bay shortly before midnight and weakened into a tropical storm.
The Observatory says it will drop the Number 8 signal to Number 3 shortly.
There have been heavy rains and winds in excess of 100 kilometres per hour, causing over a dozen trees to topple, but so far no reports of serious damage.
Over 200 people made use of 22 temporary shelters opened in various districts.
Dozens of flights have been cancelled and hundreds delayed as a result of the storm. Travellers have been urged to check their flight details before departing for the airport.
The government says several people have sought medical assistance at public hospitals, but it’s unclear if their injuries are related to the storm.