Report on Tropical Depression(25 to 26 June)

Tropical Depression
25 to 26 June 2025

A tropical depression formed over the central part of the South China Sea on the morning of 25 June and was the second tropical cyclone affecting Hong Kong in 2025.

The tropical depression formed over the central part of the South China Sea about 170 km northeast of Xisha and moved northwestwards towards the eastern part of Hainan Island. It attained its peak intensity with an estimated maximum sustained wind of 55 km/h near its centre on the evening of 25 June. After skirting across Wenchang of Hainan Island in the small hours on 26 June, it made landfall again over Zhanjiang of Guangdong that morning. The tropical depression then moved inland and finally degenerated into an area of low pressure over Guangxi in the small hours of the next day.

According to press reports, the tropical depression brought very heavy rain and squalls to Hainan Island and Zhanjiang of Guangdong. A maximum accumulated rainfall of 218.2 millimetres was recorded in Wenchang of Hainan Island.

The Standby Signal No. 1 was issued at 2:20 p.m. on 25 June, when the tropical depression was about 490 km south of Hong Kong. Local winds were moderate to fresh east to southeasterlies, occasionally strong offshore and on high ground from that night to the next morning. The tropical depression came closest to Hong Kong at around 2 a.m. on 26 June, skirting past about 420 km southwest of the territory. With the tropical depression gradually weakening and departing from Hong Kong, it no longer posed a threat to Hong Kong and all tropical cyclone warning signals were cancelled at 2:20 p.m. on 26 June.

The tropical depression did not cause any significant damage when it affected Hong Kong. At the Observatory Headquarters, the lowest instantaneous mean sea-level pressure of 1007.2 hPa was recorded at 4:35 p.m. on 25 June. Under the influence of the tropical depression, a maximum sea level of 3.26 m (above chart datum) and a maximum storm surge of 0.30 m (above astronomical tide) were recorded at Tsim Bei Tsui.

The local weather was mainly fine and very hot during the day on 25 June, and the outer rainbands of the tropical depression gradually affected the territory that night. There were heavy showers and squally thunderstorms in Hong Kong the next day. Around 30 millimetres of rainfall were generally recorded over the territory, with rainfall even exceeding 50 millimetres over Hong Kong Island and Kowloon.