The city will be affected by a dry northeast monsoon while a possible tropical cyclone would move across the Luzon Strait on Sunday.

The Observatory says the weather this week will remain dry and fine, as a dry northeast monsoon will arrive in the coast of Guangdong on Sunday.

However, two low-pressure systems will bring strong winds to the city.

"The area of low pressure near the Philippines will move across the central to southern parts of the South China Sea and develop gradually in the next couple of days," said the Observatory.

"Besides, another area of low pressure over the western North Pacific will develop into a tropical cyclone, and move across the Luzon Strait on Sunday.

"Under their combined effect, it will be windy and become cooler over the coastal areas early to midweek next week."

The minimum temperature in the urban area on Wednesday will be 20 degrees Celsius, while the maximum will be 25.

The low-pressure system moving to the central to southern parts of the South China Sea will be moving to the southwest under the influence of the high-altitude anticyclone.

"This will keep the low-pressure area away from Hong Kong," the Observatory said. "Generally, the low-pressure system is predicted to be weak."

However, more uncertainties lie with the tropical cyclone-to-be crossing the Luzon Strait on Sunday. The Observatory believes that it is most likely to fade away to the southwest of Hong Kong.

Meanwhile, as forecast by the National Meteorological Center of the mainland, there would be one or two tropical cyclones forming in the northwest Pacific Ocean and the South China Sea in the coming 10 days.

They may bring rainfall to the southeastern coast of China, the center said.