SOUTH CHINA COASTAL WATERS

(NOT TO BE ISSUED AFTER 3:30 A.M. TOMORROW, THURSDAY)

WEATHER INFORMATION FOR SOUTH CHINA COASTAL WATERS ISSUED
BY THE HONG KONG OBSERVATORY AT 11:30 P.M. ON 17 SEPTEMBER
2025

WARNINGS:

GALE FORCE WINDS IN NAN'AO AND SHANWEI.

WEATHER SITUATION:

AN EASTERLY AIRSTREAM IS AFFECTING THE SOUTH CHINA COASTAL
WATERS.

AT 11 P.M., THE TROPICAL DEPRESSION NEAR LUZON WITH MAXIMUM
SUSTAINED WINDS OF ABOUT 55 KILOMETRES PER HOUR NEAR ITS
CENTRE WAS LOCATED AT 18.6 DEGREES NORTH, 120.1 DEGREES
EAST. IT IS FORECAST TO MOVE NORTHWEST AT ABOUT 18
KILOMETRES PER HOUR CROSSING THE NORTHEASTERN PART OF THE
SOUTH CHINA SEA.

AREA FORECASTS FOR THE NEXT 24 HOURS

HONG KONG ADJACENT WATERS:

EAST TO NORTHEAST FORCE 4 TO 5.
SCATTERED SHOWERS AND SQUALLY THUNDERSTORMS.
MODERATE SEAS.

NAN'AO:
EAST TO NORTHEAST FORCE 5 TO 6, BECOMING CYCLONIC FORCE 9
LATER.
FREQUENT HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.
MODERATE TO ROUGH SEAS, BECOMING VERY ROUGH LATER.

SHANWEI:
EAST TO NORTHEAST FORCE 5 TO 6, BECOMING NORTH FORCE 9
LATER.
FREQUENT HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.
MODERATE TO ROUGH SEAS, BECOMING VERY ROUGH LATER.

SOUTH OF HONG KONG AND SHANGCHUAN DAO:
EAST TO NORTHEAST FORCE 4 TO 5.
SCATTERED SHOWERS AND SQUALLY THUNDERSTORMS.
MODERATE SEAS.

OUTLOOK FOR THE FOLLOWING 48 HOURS

WEST TO NORTHWESTERLY WINDS OF UP TO FORCE 9, CYCLONIC
WINDS OF FORCE 10 IN EAST AT FIRST. FREQUENT HEAVY SQUALLY
SHOWERS AND THUNDERSTORMS.

LATEST REPORTS FROM SOUTH CHINA COASTAL WEATHER STATIONS

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WAGLAN ISLAND      WIND EAST-NORTHEAST FORCE 4 
                   VISIBILITY OVER 50 KILOMETRES

SHANTOU            WIND WEST FORCE 1 
                   VISIBILITY 30 KILOMETRES

HUANGMAOZHOU       WIND EAST FORCE 5

MACAU              WIND NORTH-NORTHEAST FORCE 2

XISHA              WIND EAST-NORTHEAST FORCE 2 
                   VISIBILITY 30 KILOMETRES

DISPATCHED BY HONG KONG OBSERVATORY AT 23:30 HKT ON 17.09.2025