SOUTH CHINA COASTAL WATERS

(NOT TO BE ISSUED AFTER 7:45 P.M.)

WEATHER INFORMATION FOR SOUTH CHINA COASTAL WATERS ISSUED
BY THE HONG KONG OBSERVATORY AT 5:50 P.M. ON 4 OCTOBER 2025

WARNINGS:

HURRICANE FORCE WINDS IN SOUTH OF HONG KONG AND SHANGCHUAN
DAO. GALE FORCE WINDS IN HONG KONG ADJACENT WATERS AND
SHANWEI. STRONG WINDS IN NAN'AO.

WEATHER SITUATION:

SEVERE TROPICAL STORM MATMO HAS INTENSIFIED INTO A TYPHOON.
 
AT 6 P.M., MATMO WITH MAXIMUM SUSTAINED WINDS OF ABOUT 120
KILOMETRES PER HOUR NEAR ITS CENTRE WAS LOCATED AT 18.6
DEGREES NORTH, 114.5 DEGREES EAST. IT IS FORECAST TO MOVE
WEST-NORTHWEST AT ABOUT 25 KILOMETRES PER HOUR ACROSS THE
NORTHERN PART OF THE SOUTH CHINA SEA.

AREA FORECASTS FOR THE NEXT 24 HOURS

HONG KONG ADJACENT WATERS:

EAST FORCE 6 TO 7, OCCASIONALLY FORCE 8, BECOMING SOUTHEAST
FORCE 8.
FREQUENT HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.
ROUGH TO VERY ROUGH SEAS.

NAN'AO:
SOUTHEAST FORCE 5 TO 6, UP TO FORCE 7 AT FIRST.
FREQUENT HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.
MODERATE TO ROUGH SEAS.

SHANWEI:
SOUTHEAST FORCE 7 TO 8, UP TO FORCE 9 AT FIRST.
FREQUENT HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.
ROUGH TO VERY ROUGH SEAS, HIGH AT FIRST.

SOUTH OF HONG KONG:
NORTHEAST FORCE 8 TO 9, BECOMING SOUTHEAST FORCE 12.
FREQUENT HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.
VERY ROUGH TO HIGH SEAS, BECOMING PHENOMENAL.

SHANGCHUAN DAO:
NORTH TO NORTHEAST FORCE 8 TO 9, BECOMING CYCLONIC FORCE 12.
FREQUENT HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.
VERY ROUGH TO HIGH SEAS, BECOMING PHENOMENAL.

OUTLOOK FOR THE FOLLOWING 48 HOURS

SOUTHEASTERLY WINDS OF FORCE 8 TO 9, SOUTHERLY WINDS OF UP
TO FORCE 11 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 6 
                   VISIBILITY 18 KILOMETRES

SHANTOU            WIND EAST-SOUTHEAST FORCE 2 
                   VISIBILITY 30 KILOMETRES

MACAU              WIND EAST FORCE 4 
                   VISIBILITY 35 KILOMETRES IN RAIN

XISHA              WIND WEST-NORTHWEST FORCE 3 
                   VISIBILITY 12 KILOMETRES IN RAIN

DISPATCHED BY HONG KONG OBSERVATORY AT 17:50 HKT ON 04.10.2025