SOUTH CHINA COASTAL WATERS

(NOT TO BE ISSUED AFTER 9:45 A.M.)

WEATHER INFORMATION FOR SOUTH CHINA COASTAL WATERS ISSUED
BY THE HONG KONG OBSERVATORY AT 5:30 A.M. ON 21 SEPTEMBER
2025

WARNINGS:

STRONG WINDS IN NAN'AO.

WEATHER SITUATION:

AN EASTERLY AIRSTREAM IS AFFECTING THE COASTAL WATERS OF
GUANGDONG. MEANWHILE, THE UNSETTLED WEATHER ASSOCIATED WITH
THE REMNANT OF MITAG IS AFFECTING THE REGION.

AT 5 A.M., SUPER TYPHOON RAGASA WITH MAXIMUM SUSTAINED
WINDS OF ABOUT 195 KILOMETRES PER HOUR NEAR ITS CENTRE WAS
LOCATED AT 17.9 DEGREES NORTH, 127.3 DEGREES EAST. IT IS
FORECAST TO MOVE WEST-NORTHWEST AT ABOUT 18 KILOMETRES PER
HOUR TOWARDS THE VICINITY OF THE LUZON STRAIT AND CONTINUE
TO INTENSIFY.

AREA FORECASTS FOR THE NEXT 24 HOURS

HONG KONG ADJACENT WATERS:

EAST TO SOUTHEAST FORCE 4 TO 5.
OCCASIONAL HEAVY SHOWERS AND SQUALLY THUNDERSTORMS.
MODERATE SEAS.

NAN'AO:
EAST TO SOUTHEAST FORCE 4 TO 5, BECOMING NORTHEAST UP TO
FORCE 6.
OCCASIONAL HEAVY SHOWERS AND SQUALLY THUNDERSTORMS.
MODERATE SEAS, BECOMING ROUGH.

SHANWEI AND SOUTH OF HONG KONG:
EAST TO SOUTHEAST FORCE 4 TO 5, BECOMING NORTHEAST UP TO
FORCE 5.
OCCASIONAL HEAVY SHOWERS AND SQUALLY THUNDERSTORMS.
MODERATE SEAS.

SHANGCHUAN DAO:
SOUTH TO SOUTHEAST FORCE 4, OCCASIONALLY FORCE 5, BECOMING
EAST UP TO FORCE 5.
OCCASIONAL HEAVY SHOWERS AND SQUALLY THUNDERSTORMS.
MODERATE SEAS.

OUTLOOK FOR THE FOLLOWING 48 HOURS

EASTERLY WINDS OF FORCE 5 TO 6, BECOMING CYCLONIC WINDS OF
UP TO FORCE 12 LATER. FREQUENT HEAVY SQUALLY SHOWERS AND
THUNDERSTORMS.

LATEST REPORTS FROM SOUTH CHINA COASTAL WEATHER STATIONS

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WAGLAN ISLAND      WIND EAST FORCE 4 
                   VISIBILITY 17 KILOMETRES

SHANTOU            WIND EAST FORCE 2 
                   VISIBILITY 30 KILOMETRES IN DRIZZLE

HUANGMAOZHOU       WIND SOUTH-SOUTHEAST FORCE 4

MACAU              WIND SOUTHEAST FORCE 2 
                   VISIBILITY OVER 50 KILOMETRES

XISHA              WIND SOUTH FORCE 1 
                   VISIBILITY 30 KILOMETRES

WEATHER BULLETIN FOR HONG KONG WATERS

AT 5 A.M. HONG KONG TIME:

KAI TAK:
WIND EAST-SOUTHEAST FORCE 3.
 
STAR FERRY KOWLOON:
WIND EAST FORCE 2.
 
GREEN ISLAND:
WIND EAST FORCE 2.
 
CHEUNG CHAU:
WIND SOUTHEAST FORCE 5.
 
SEA WAVES NEAR WAGLAN ISLAND WILL BE ABOUT 1 METRE TO 2
METRES DURING THE NEXT 12 HOURS.
 
SWELL OF UP TO 1 METRE CAN BE EXPECTED.
 
THE SEA TEMPERATURE IN VICTORIA HARBOUR IS 28 DEGREES
CELSIUS.
 
THE NEXT HIGH TIDE IN VICTORIA HARBOUR WILL BE 2.3 METRES
AT 9:01 A.M. TODAY AND THE NEXT LOW TIDE WILL BE 0.8 METRE
AT 3:13 P.M. TODAY.

DISPATCHED BY HONG KONG OBSERVATORY AT 05:30 HKT ON 21.09.2025