Bulletin updated at 11:30 HKT 17/Aug/2026
9-Day Weather Forecast General Situation: A broad trough of low pressure will affect the northern part of the South China Sea to the seas east of Luzon in the next few days. Two areas of low pressure may exist over the trough of low pressure. However, there are uncertainties in their subsequent development and movement. The area of low pressure over the northern part of the South China Sea is expected to develop slightly, and has a higher chance to move towards the vicinity of Hainan Island in the next couple of days. Under the combined effect of the area of low pressure and a ridge of high pressure over southeastern China, it will be windier with showers over the coast of Guangdong midweek this week. Meanwhile, the area of low pressure to the east of Luzon will generally move towards the vicinity of Taiwan. With the whole low pressure system edging closer to the vicinity of the coast of southeastern China to southern China, the weather over the region will be unsettled in the latter part of this week. Date/Month 18/8 (Tuesday) Wind: East to northeast force 3 to 4, force 5 offshore and on high ground later. Weather: Mainly cloudy with a few showers and thunderstorms. More showers in some areas at first. Sunny intervals in the afternoon. Temp Range: 27 - 32 C R.H. Range: 70 - 95 Per Cent PSR: Medium Date/Month 19/8(Wednesday) Wind: East force 4 to 5, occasionally force 6 offshore and on high ground. Weather: Mainly cloudy with a few showers and squally thunderstorms. Bright periods during the day. Temp Range: 27 - 32 C R.H. Range: 70 - 95 Per Cent PSR: Medium Date/Month 20/8(Thursday) Wind: East to southeast force 4 to 5, occasionally force 6 on high ground at first. Weather: Mainly cloudy with a few showers. Sunny intervals during the day. Temp Range: 27 - 32 C R.H. Range: 75 - 95 Per Cent PSR: Medium Low Date/Month 21/8(Friday) Wind: East to southeast force 4, occasionally force 5 offshore. Weather: Mainly cloudy with a few showers and squally thunderstorms. More showers in some areas. Temp Range: 27 - 31 C R.H. Range: 75 - 95 Per Cent PSR: Medium High Date/Month 22/8(Saturday) Wind: South to southwest force 4, occasionally force 5 offshore. Weather: Mainly cloudy with occasional showers and squally thunderstorms. Temp Range: 27 - 31 C R.H. Range: 75 - 95 Per Cent PSR: Medium High Date/Month 23/8(Sunday) Wind: South to southwest force 4. Weather: Mainly cloudy with occasional showers and squally thunderstorms. Temp Range: 27 - 31 C R.H. Range: 75 - 95 Per Cent PSR: Medium High Date/Month 24/8(Monday) Wind: South to southeast force 4. Weather: Mainly cloudy with a few showers. Temp Range: 27 - 31 C R.H. Range: 75 - 95 Per Cent PSR: Medium Date/Month 25/8(Tuesday) Wind: Southeast force 4. Weather: Mainly cloudy with a few showers. Sunny intervals during the day. Temp Range: 27 - 31 C R.H. Range: 75 - 95 Per Cent PSR: Medium Low Date/Month 26/8(Wednesday) Wind: Southeast force 4. Weather: Sunny intervals and one or two showers. Temp Range: 28 - 32 C R.H. Range: 70 - 90 Per Cent PSR: Medium Low Sea surface temperature at 7 a.m.17/8/2026 at North Point was 27 degrees C. Soil temperatures at 7 a.m.17/8/2026 at the Hong Kong Observatory: 0.5 M below surface was 30.5 degrees C. 1.0 M below surface was 29.9 degrees C. Weather Cartoons for 9-day weather forecast Day 1 cartoon no. 54 - Sunny Intervals with Showers Day 2 cartoon no. 62 - Light Rain Day 3 cartoon no. 54 - Sunny Intervals with Showers Day 4 cartoon no. 62 - Light Rain Day 5 cartoon no. 63 - Rain Day 6 cartoon no. 63 - Rain Day 7 cartoon no. 62 - Light Rain Day 8 cartoon no. 54 - Sunny Intervals with Showers Day 9 cartoon no. 54 - Sunny Intervals with Showers
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