General Situation
Tropical Cyclone Mitag will move across the vicinity of the northern part of the Pearl River Estuary and weaken gradually today. Under the influence of the remnant of Mitag, there will still be showers and squally thunderstorms over Guangdong tomorrow. Tropical Cyclone Ragasa will move towards the vicinity of Luzon Strait and intensify significantly in the next couple of days, and enter the northern part of the South China Sea early next week. Under the influence of its outer subsiding air, the weather will be very hot over the coast of Guangdong on Monday to early Tuesday. Ragasa is expected to edge closer to the coast of Guangdong gradually on Tuesday. Under the influence of its broad circulation, the weather over the region will deteriorate with winds strengthening significantly midweek next week. There will be heavy squally showers, thunderstorms and significant storm surge. Seas will be high with swells. With the departure of Ragasa, showers will ease off gradually in the latter part of next week. Besides, a broad trough of low pressure will bring unsettled weather to the central and northern parts of the South China Sea to the eastern part of the Philippines in the latter part of next week.
Sunday, Sep 21
Mainly cloudy with occasional showers and squally thunderstorms. Showers will be heavier at times at first.
Max Temp: 31°C
Min Temp: 26°C
Humidity: 70-95%
Wind: East to southeast force 4, occasionally force 5.
Probability of Significant Rain: High
Monday, Sep 22
Cloudy periods at first. Becoming fine and very hot during the day.
Max Temp: 34°C
Min Temp: 27°C
Humidity: 55-90%
Wind: East force 4, becoming north.
Probability of Significant Rain: Low
Tuesday, Sep 23
Becoming cloudy. Very hot with sunny intervals in the morning. Squally showers and thunderstorms later. Seas will be very rough with swells.
Max Temp: 34°C
Min Temp: 27°C
Humidity: 55-95%
Wind: North force 4 to 5, force 6 to 7 later, up to force 8 offshore and on high ground.
Probability of Significant Rain: Medium High
Wednesday, Sep 24
Cloudy to overcast with heavy squally showers and thunderstorms. Seas will be high with swells.
Max Temp: 28°C
Min Temp: 25°C
Humidity: 80-95%
Wind: East to northeast force 8 to 9, up to force 11 offshore and on high ground. Becoming southeast later.
Probability of Significant Rain: High
Thursday, Sep 25
Cloudy with squally showers and thunderstorms. Showers will be heavy at first. Seas will be very rough with swells.
Max Temp: 29°C
Min Temp: 25°C
Humidity: 80-95%
Wind: East to southeast force 5 to 6, force 7 offshore and on high ground at first.
Probability of Significant Rain: High
Friday, Sep 26
Mainly cloudy with occasional showers and a few thunderstorms.
Max Temp: 30°C
Min Temp: 26°C
Humidity: 75-95%
Wind: East force 3 to 4.
Probability of Significant Rain: Medium High
Saturday, Sep 27
Mainly cloudy with a few showers. Sunny intervals during the day.
Max Temp: 32°C
Min Temp: 27°C
Humidity: 65-90%
Wind: East to northeast force 4, occasionally force 5.
Probability of Significant Rain: Medium Low
Sunday, Sep 28
Mainly cloudy with a few showers. Sunny intervals during the day.
Max Temp: 32°C
Min Temp: 27°C
Humidity: 65-90%
Wind: East force 4 to 5.
Probability of Significant Rain: Medium Low
Monday, Sep 29
Mainly cloudy with a few showers and thunderstorms.
Max Temp: 31°C
Min Temp: 27°C
Humidity: 70-95%
Wind: East to southeast force 4.
Probability of Significant Rain: Medium
Additional Information
Sea Temperature (North Point): 27°C (Recorded: Sep 20, 2025, 07:00)
Soil Temperature (Hong Kong Observatory, 0.5m): 30.1°C (Recorded: Sep 20, 2025, 07:00)
Soil Temperature (Hong Kong Observatory, 1m): 30.4°C (Recorded: Sep 20, 2025, 07:00)