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 4:20 A.M. ON 31 MAY 2026

WARNINGS:

STRONG WINDS IN NAN'AO.

WEATHER SITUATION:

AN EASTERLY AIRSTREAM IS AFFECTING THE COASTAL WATERS OF
GUANGDONG.

SEVERE TROPICAL STORM JANGMI HAS INTENSIFIED INTO A TYPHOON.
 
AT 3 A.M., JANGMI WITH MAXIMUM SUSTAINED WINDS OF ABOUT 120
KILOMETRES PER HOUR NEAR ITS CENTRE WAS LOCATED AT 20.1
DEGREES NORTH, 128.3 DEGREES EAST. IT IS FORECAST TO MOVE
NORTH-NORTHWEST AT ABOUT 14 KILOMETRES PER HOUR TOWARDS THE
VICINITY OF THE RYUKYU ISLANDS.

AREA FORECASTS FOR THE NEXT 24 HOURS

HONG KONG ADJACENT WATERS:

EAST TO SOUTHEAST FORCE 3 TO 4.
SCATTERED SHOWERS AND SQUALLY THUNDERSTORMS. SHOWERS WILL
BE HEAVY AT FIRST.
SLIGHT TO MODERATE SEAS.

NAN'AO:
EAST TO NORTHEAST FORCE 4 TO 5, OCCASIONALLY FORCE 6.
ISOLATED SHOWERS AND THUNDERSTORMS.
MODERATE TO ROUGH SEAS.

SHANWEI:
EAST TO NORTHEAST FORCE 4, OCCASIONALLY FORCE 5.
ISOLATED SHOWERS AND THUNDERSTORMS.
MODERATE SEAS.

SOUTH OF HONG KONG AND SHANGCHUAN DAO:
EAST FORCE 4.
ISOLATED SHOWERS AND THUNDERSTORMS.
MODERATE SEAS.

OUTLOOK FOR THE FOLLOWING 48 HOURS

EASTERLY WINDS OF FORCE 4, OCCASIONALLY FORCE 5, BECOMING
SOUTHERLY WINDS UP TO FORCE 5. ISOLATED SHOWERS AND
THUNDERSTORMS.

LATEST REPORTS FROM SOUTH CHINA COASTAL WEATHER STATIONS

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WAGLAN ISLAND      WIND EAST FORCE 2 
                   VISIBILITY 20 KILOMETRES

SHANTOU            WIND EAST FORCE 1 
                   VISIBILITY 30 KILOMETRES

MACAU              WIND SOUTH-SOUTHEAST FORCE 1 
                   VISIBILITY 30 KILOMETRES

XISHA              WIND EAST-NORTHEAST FORCE 1 
                   VISIBILITY 28 KILOMETRES

DISPATCHED BY HONG KONG OBSERVATORY AT 04:20 HKT ON 31.05.2026