WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
24th OF AUGUST 2026 AT 13:30 UTC.
FOR SOUTH-EAST SECTOR OF METAREA. VII, PREPARED BY REUNION, SEE AREA 2
BELOW.
NOTE: WX OBSERVATIONS.
======================
COULD ALL VESSELS EXPERIENCING UNEXPECTED, SEVERE WX/SEA STATE PLEASE
MAKE EVERY EFFORT TO REPORT THIS TO SAWS VIA CAPE TOWN RADIO.
AREA 1:
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FORECAST VALID FROM 242200 TO 252200 UTC:
WIND IN KNOTS, WAVE HEIGHTS IN METERS. NO SEA STATE GIVEN IF WAVES LESS THAN 3M.
NOTE THE WIND SPEEDS QUOTED HERE ARE THE EXPECTED AVERAGE SPEEDS.
INDIVIDUAL GUSTS MAY EXCEED THESE VALUES BY A FACTOR OF UP TO 1.5.
WAVE HEIGHTS ARE SIGNIFICANT WAVE HEIGHTS, WHICH MAY BE ACCOMPANIED BY INDIVIDUAL WAVES 1.5 TO 2.0 TIMES HIGHER.
GALE FORCE WARNINGS:
====================
1. CAPE EAST: S to SW 35 to 40 in the south from mid-period.
2. MARION FORTIES EAST: W to NW 35 to 45. It will become SW 35 to 45 in the
west from mid-period.
SYNOPTIC CHART 12:00Z
=====================
High 1028 hPa 33s03e, High 1026 hPa 27s35e.
Low 976 hPa 46s33w, Low 922 hPa 60s45e, Low 1014 hPa 32s53e.
1. Cold front: 41s35e 42s45e 46s55e 50s60e 55s62e 60s58e 62s48e into 60s45e.
2. Cold front: 36s19w 42s18w 47s19w 51s25w 48s34w into 46s33w.
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : S to SE 10 to 20.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SW 05 to 15 but SE 10 to 20 in the south-west.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 10 to 20 but W to NW 15 to 25 in the south-west.
VIS : Good but moderate in showers and thundershowers in the south-west.
SEA STATE: 3.0 to 4.0m in the south-west, with SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Anticyclonic 05 to 10 in the north-east, otherwise S to SE 15 to
25.
VIS : Good.
TRISTAN (30S/40S, 00E/20W):
WIND : N to NW 20 to 30.
VIS : Moderate to poor in showers and thundershowers.
SEA STATE: 3.0 to 4.0m in the west, reaching 4.5 to 5.5m in the extreme west,
with W to NW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anticyclonic 05 to 15 in the south, otherwise E to SE 10 to 20,
reaching 25 to 30 in the north-east.
VIS : Good, but moderate in showers and rain in the south-west.
SEA STATE: 3.0 to 4.0m in the east, reaching 4.5m in the extreme south-east,
with W to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : S to SW 20 to 30, reaching 35 to 40 in the south from mid-period.
It will be W to NW 20 to 30 in the north-east.
VIS : Good but moderate to poor in showers and rain in the south,
spreading to the north from mid-period, while clearing in the
south-west.
SEA STATE: 3.0 to 4.0m, reaching 5.0 to 6.0m in the south, but 6.5 to 7.5m in
the extreme south by mid-period while 8.0 to 9.0m towards end of
the period, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Variable 05 to 10 in the north, otherwise W to SW 10 to 20. It
will become cyclonic 10 to 20 in the extreme west from mid-period.
VIS : Good but moderate in showers in the extreme south-west towards end
of the period.
SEA STATE: 3.0 to 3.5m except in the north-west, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 20.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : SE 10 to 20, but variable 05 to 10 in the south, becoming N to NE
10 to 20 in the south-west from mid-period.
VIS : Good but moderate in showers and rain in the extreme south as well
as in the north.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to NW 35 to 45. It will become SW 35 to 45 in the west from mid-
period.
VIS : Moderate to poor in showers and thundershowers with possible snow
showers in the south.
SEA STATE: 6.0 to 7.0m, reaching 8.0 to 9.0m in the south, but 9.5 to 10.0m
in the south-west, spreading to the north-west from mid-period,
with W to SW swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/08/24 AT 0600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE FORCE 8 ONGOING AND EXPECTED OVER CRO AND KER.
PART 2: GENERAL SYNOPSIS, 26/08/24 AT 0000UTC
- LOW 1009 HPA NEAR 33S/48E ASSOCIATED WITH A COLD FRONT (CF) AXIS 35S/50E, 31S/51E, 28S/48E AND A WARM FRONT (WF) AXIS 35S/50E, 36S/54E, 35S/59E; THE SYSTEM IS MOVING EASTWARD AT 1520 KT.
- COLD FRONT (CG) AXIS 61S/56E, 48S/63E, 37S/53E, MOVING EASTWARD AT 2530
KT.
- LOW 933 HPA NEAR 60S/34E ASSOCIATED WITH A COLD FRONT (CH) AXIS AT 60S/35E, 53S/49E, 43S/26E, MOVING EASTWARD AT 25/30 KT.
PART 3: FORECAST FOR 24 HOURS FROM 26/08/24 AT 0600UTC TO 26/08/25 AT 0600UTC
WAM (30S/40S, 50E/65E)
RAIN AND FRONTAL SHOWERS UNDER CF, WF, AND CG. LOCALLY THUNDERSTORMS.
WIND: NW 4 TO 6, LOCALLY 7 FROM NORTH TO SOUTH, AND CLOCKWISE 3 TO 5 OVER THE
NORTH-WESTERN AREA, BECOMING VARIABLE AND LIGHT OVER THE NORTHERN AREA
AND WESTERLY 5/6 LOCALLY 7 OVER THE SOUTHERN AREA. GUSTS.
SEA : ROUGH, BECOMING MODERATE AND VERY ROUGH OVER THE FAR SOUTHERN AREA. SW
SWELL OF 2 TO 3 M ABATING.
VIS : POOR DURING PRECIPITATIONS.
AMS (30S/40S, 65E/80E)
SCATTERED SHOWERS, MORE FREQUENT OVER THE SOUTHERN AREA.
WIND: W TO NW, 3 TO 5 FROM NORTH TO SOUTH, INCREASING TO NW 6 OVER THE FAR
SOUTHERN AREA.
SEA : VERY ROUGH, DECREASING. SW SWELL, 4 TO 5 M, ABATING.
VIS : POOR DURING PRECIPITATIONS.
CRO (40S/50S, 50E/65E)
RAIN, SNOW, AND FRONTAL SHOWERS UNDER CG, THEN CH.
WIND: NW 6/7 AHEAD OF CG, BACKING TO SW 5/6 BEHIND IT, THEN BACKING TO NW 7,
LOCALLY 8 AHEAD OF CH, AND BACKING TO WESTERLY 5 TO 7, LOCALLY 8, OVER
THE FAR SOUTH-WESTERN AREA.
SEA : ROUGH TO VERY ROUGH, BECOMING VERY ROUGH TO HIGH. SW SWELL 2 TO 3 M,
INCREASING TO 5 TO 7 M AT THE END OF THE PERIOD OVER THE SOUTH-WESTERN
AREA.
VIS : POOR TO VERY POOR IN PRECIPITATIONS.
KER (40S/50S, 65E/80E)
SCATTERED SHOWERS, THEN FRONTAL SHOWERS UNDER CH. SNOW OVER SOUTHERN.
WIND: WESTERLY 4 TO 6, INCREASING TO NW 5/6, LOCALLY 7 AHEAD OF CH, AND
BACKING TO W TO NW 6/7 BEHIND IT. STRONG GUSTS.
SEA : ROUGH TO VERY ROUGH. WESTERLY SWELL 3 TO 4 M.
VIS : POOR OR VERY POOR IN PRECIPITATIONS.