SOUTH CHINA COASTAL WATERS

(NOT TO BE ISSUED AFTER 5:30 A.M.)

WEATHER INFORMATION FOR SOUTH CHINA COASTAL WATERS ISSUED
BY THE HONG KONG OBSERVATORY AT 3:30 A.M. ON 18 AUGUST 2025

WARNINGS:

SEVERE SQUALLY THUNDERSTORMS IN HONG KONG ADJACENT WATERS.
STRONG WINDS IN ALL AREAS.

WEATHER SITUATION:

AT 3 A.M.,  THE TROPICAL DEPRESSION OVER THE CENTRAL AND
NORTHERN PARTS OF THE SOUTH CHINA SEA WITH MAXIMUM
SUSTAINED WINDS OF ABOUT 45 KILOMETRES PER HOUR NEAR ITS
CENTRE WAS LOCATED AT 18.2 DEGREES NORTH, 108.9 DEGREES
EAST, IT IS FORECAST TO MOVE NORTHWEST OR WEST-NORTHWEST AT
ABOUT 12 KILOMETRES PER HOUR IN THE GENERAL DIRECTION OF
THE VICINITY OF THE SOUTHWESTERN COAST OF HAINAN ISLAND TO
BEIBU WAN.

AREA FORECASTS FOR THE NEXT 24 HOURS

HONG KONG ADJACENT WATERS:

EAST TO SOUTHEAST FORCE 5 TO 6, OCCASIONALLY FORCE 7, GUSTS
OCCASIONALLY UP TO FORCE 10 AT FIRST.
HEAVY SHOWERS AND SEVERE SQUALLY THUNDERSTORMS.
ROUGH SEAS.

NAN'AO AND SHANWEI:
SOUTHEAST FORCE 4 TO 5, OCCASIONALLY FORCE 6.
SCATTERED SHOWERS AND SQUALLY THUNDERSTORMS.
MODERATE TO ROUGH SEAS.

SOUTH OF HONG KONG AND SHANGCHUAN DAO:
EAST TO SOUTHEAST FORCE 5 TO 6, OCCASIONALLY FORCE 7.
FREQUENT HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.
MODERATE TO ROUGH SEAS.

OUTLOOK FOR THE FOLLOWING 48 HOURS

SOUTHERLY WINDS OF FORCE 4 TO 5, SOUTHEASTERLY WINDS OF UP
TO FORCE 6 AT FIRST. OCCASIONAL HEAVY SQUALLY SHOWERS AND
THUNDERSTORMS.

LATEST REPORTS FROM SOUTH CHINA COASTAL WEATHER STATIONS

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WAGLAN ISLAND      WIND EAST-SOUTHEAST FORCE 5 
                   VISIBILITY 3500 METRES

SHANTOU            WIND EAST-SOUTHEAST FORCE 1 
                   VISIBILITY 26 KILOMETRES IN RAIN

HUANGMAOZHOU       WIND EAST-SOUTHEAST FORCE 5

MACAU              WIND SOUTH-SOUTHEAST FORCE 2 
                   VISIBILITY 5000 METRES IN RAIN

XISHA              WIND SOUTHWEST FORCE 5 
                   VISIBILITY 12 KILOMETRES

DISPATCHED BY HONG KONG OBSERVATORY AT 03:30 HKT ON 18.08.2025