WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
24th OF AUGUST 2026 AT 16:30 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 16300UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (Wind gusts may be about 40% stronger than the averages given here).
PART 1: WARNING
- Gale ongoing over CROand expected KER.
PART 2: GENERAL SYNOPSIS, 26/08/24 AT 1200UTC
- Thundery low 1014 near 32S/53E, steadily moving eastward.
- Cold front over CRO, rapidly moving eastward.
PART 3: FORECAST FOR 24 HOURS FROM 26/08/24 at 1800UTCto 26/08/25 at 1800UTC
WAM (30S/40S, 50E/65E)
Thundery showers over northern. Frontal rain and showers over far southern later.
WIND : clockwise 3/4 over northern at times 5, but Westerly 5/6 with
gusts over southern. Increasing later W 4/5 over northern but 6/7
over southern. Gusts.
SEA : moderate to rough, becoming gradually very rough to high over
southern by long SW swell increasing 3 to 5m.
VIS : poor to very poor in precipitation.
AMS (30S/40S, 65E/80E)
Scattered showers. Thundery showers over far north-western at end.
WIND : Westerly 3/4 over northern but 5/6 with gusts over southern,
veering gradually NW 4/5 from west, at times 6 over southern.
SEA : rough, but very rough over eastern at first by SW swell 3 to 4m
abating. Becoming soon moderate to rough.
VIS : poor to very poor in precipitation.
CRO (40S/50S, 50E/65E)
Frontal rain and showers. Snowy showers behind over southern.
WIND : Westerly 6/7 at times 8. Gusts.
SEA : very rough to high by long SW swell increasing 5 to 7m.
VIS : poor to very poor in precipitation.
KER (40S/50S, 65E/80E)
Scattered showers, soon frontal rain and showers from west. Snowy showers behind over southern.
WIND : North-Westerly 5/6 at times 7, Gusts. Temporarily 8 over north-
western at end.
SEA : rough to very rough, becoming later high over far south-western by
long Westerly swell increasing 4 to 6m.
VIS : poor or very poor in precipitation.