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 4:30 P.M. ON 21 SEPTEMBER
2025

WARNINGS:

GALE FORCE WINDS IN NAN'AO. STRONG WINDS IN SHANWEI.

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 4 P.M., SUPER TYPHOON RAGASA WITH MAXIMUM SUSTAINED
WINDS OF ABOUT 220 KILOMETRES PER HOUR NEAR ITS CENTRE WAS
LOCATED AT 18.6 DEGREES NORTH, 125.9 DEGREES EAST. IT IS
FORECAST TO MOVE WEST-NORTHWEST AT ABOUT 18 KILOMETRES PER
HOUR TOWARDS THE VICINITY OF LUZON STRAIT AND CONTINUE TO
INTENSIFY.

AREA FORECASTS FOR THE NEXT 24 HOURS

HONG KONG ADJACENT WATERS:

EAST TO SOUTHEAST FORCE 4 TO 5, BECOMING NORTH UP TO FORCE
5 LATER.
OCCASIONAL HEAVY SHOWERS AND SQUALLY THUNDERSTORMS.
MODERATE SEAS.

NAN'AO:
NORTH TO NORTHEAST FORCE 5 TO 6, UP TO FORCE 8 LATER.
FREQUENT HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.
MODERATE TO ROUGH SEAS, BECOMING VERY ROUGH LATER.

SHANWEI:
EAST TO NORTHEAST FORCE 4 TO 5, BECOMING NORTH UP TO FORCE
6 LATER.
SCATTERED SHOWERS AND SQUALLY THUNDERSTORMS.
MODERATE SEAS, BECOMING ROUGH SEAS LATER.

SOUTH OF HONG KONG:
EAST TO NORTHEAST FORCE 4 TO 5, BECOMING NORTH UP TO FORCE
5 LATER.
SCATTERED SHOWERS AND SQUALLY THUNDERSTORMS.
MODERATE SEAS.

SHANGCHUAN DAO:
EAST TO NORTHEAST FORCE 4, OCCASIONALLY FORCE 5.
SCATTERED SHOWERS AND SQUALLY THUNDERSTORMS.
MODERATE SEAS.

OUTLOOK FOR THE FOLLOWING 48 HOURS

NORTHERLY WINDS OF FORCE 7 TO 8, BECOMING CYCLONIC WINDS OF
FORCE 12. FREQUENT HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.

LATEST REPORTS FROM SOUTH CHINA COASTAL WEATHER STATIONS

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WAGLAN ISLAND      WIND EAST FORCE 3 
                   VISIBILITY 48 KILOMETRES

SHANTOU            WIND EAST-SOUTHEAST FORCE 2 
                   VISIBILITY 30 KILOMETRES

HUANGMAOZHOU       WIND SOUTHEAST FORCE 2

MACAU              WIND EAST-NORTHEAST FORCE 0 
                   VISIBILITY OVER 60 KILOMETRES

XISHA              WIND SOUTH-SOUTHWEST FORCE 2 
                   VISIBILITY 30 KILOMETRES

DISPATCHED BY HONG KONG OBSERVATORY AT 16:36 HKT ON 21.09.2025