SOUTH CHINA COASTAL WATERS

(NOT TO BE ISSUED AFTER 11:30 P.M.)

WEATHER INFORMATION FOR SOUTH CHINA COASTAL WATERS ISSUED
BY THE HONG KONG OBSERVATORY AT 7:45 P.M. ON 18 SEPTEMBER
2025

WARNINGS:

STORM FORCE WINDS IN HONG KONG ADJACENT WATERS AND SHANWEI.
GALE FORCE WINDS IN NAN'AO AND SOUTH OF HONG KONG.

WEATHER SITUATION:

AT 8 P.M., TROPICAL STORM MITAG WITH MAXIMUM SUSTAINED
WINDS OF ABOUT 65 KILOMETRES PER HOUR NEAR ITS CENTRE WAS
LOCATED AT 20.5 DEGREES NORTH, 117.3 DEGREES EAST. IT IS
FORECAST TO MOVE NORTHWEST AT ABOUT 18 KILOMETRES PER HOUR
IN THE GENERAL DIRECTION OF THE COAST OF EASTERN GUANGDONG.

AREA FORECASTS FOR THE NEXT 24 HOURS

HONG KONG ADJACENT WATERS:

EAST TO NORTHEAST FORCE 4 TO 5, OCCASIONALLY FORCE 6,
BECOMING NORTH TO NORTHWEST UP TO FORCE 10 LATER.
FREQUENT HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.
MODERATE TO ROUGH SEAS, BECOMING HIGH LATER.

NAN'AO:
EAST TO NORTHEAST FORCE 7 TO 8, BECOMING CYCLONIC FORCE 9.
FREQUENT HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.
ROUGH TO VERY ROUGH SEAS, BECOMING HIGH.

SHANWEI:
NORTHEAST FORCE 7 TO 8, BECOMING CYCLONIC FORCE 10.
FREQUENT HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.
ROUGH TO VERY ROUGH SEAS, BECOMING HIGH.

SOUTH OF HONG KONG:
NORTHEAST FORCE 4 TO 5, BECOMING NORTH TO NORTHWEST UP TO
FORCE 8.
FREQUENT HEAVY SQUALLY SHOWERS AND THUNDERSTORMS.
MODERATE SEAS, BECOMING VERY ROUGH.

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

OUTLOOK FOR THE FOLLOWING 48 HOURS

SOUTHWESTERLY WINDS OF UP TO FORCE 7, 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 NORTH-NORTHEAST FORCE 4 
                   VISIBILITY 41 KILOMETRES

SHANTOU            WIND EAST-SOUTHEAST FORCE 2 
                   VISIBILITY 30 KILOMETRES IN RAIN

HUANGMAOZHOU       WIND EAST-NORTHEAST FORCE 4

MACAU              WIND EAST-NORTHEAST FORCE 2 
                   VISIBILITY OVER 50 KILOMETRES

XISHA              WIND EAST-SOUTHEAST FORCE 2 
                   VISIBILITY 27 KILOMETRES

DISPATCHED BY HONG KONG OBSERVATORY AT 19:51 HKT ON 18.09.2025