WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
24TH OF SEPTEMBER 2026 AT 08:30 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 241000 TO 251000 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. MARION FORTIES EAST: W to NW 35 to 40 in the central and southern
half spreading to the east from mid-period.
SYNOPTIC CHART 06:00Z
=====================
High 1030 hPa 40s28e, High 1024 hPa 31s38e
Low 920 hPa 24s04e, Low 992 hPa 51s10w
1. Cold Front: 27s30w 31s24w 35s19w 40s13w 44s08w into 51s10w
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : SE 10 to 20 reaching 25 in the south-west.
VIS : Good but moderate in light rain in the south-west.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20 but SW 05 to 10 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : Variable 05 to 10 in the south, otherwise E to SE 15 to 25.
VIS : Good.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Variable 05 to 10 in the central and south, otherwise S to SE
10 to 20.
VIS : Good.
TRISTAN (30S/40S, 00E/20W):
WIND : Anti-cyclonic 05 to 15 over the north and north-east, but SW
15 to 25 in the south-west, otherwise N to NW 15 to 25. It
will become anti-cyclonic 05 to 15 in the south-west from
tomorrow morning.
VIS : Good, but moderate in showers and rain in the west and
southern parts, spreading to the south-east tomorrow morning
while clearing in the south.
SEA STATE: 3.0 to 4.0m in the west and southern parts, reaching 4.5m in
the south-west at first, with W to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Variable 05 to 10 in the north, but W to NW 15 to 25 in the
south-west, otherwise S to SE 10 to 20.
VIS : Good but moderate in showers and thundershowers in places in
north-west and central parts, spreading to the south-east and
north-east from tomorrow morning.
SEA STATE: 3.0 to 3.5m in the south-east until mid-period, as well as
south-west from mid-period, with S to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : E to NE 15 to 25 in the north-west otherwise anti-cyclonic 05
to 15. It will become W to NW 15 to 25 in the south-east from
tomorrow morning.
VIS : Good but moderate in light showers and rain in the north-east,
becoming moderate in showers and thundershowers over the west
towards the end of the period.
SEA STATE: 3.0 to 4.0m in the west and southern parts, spreading to the
east from tomorrow morning, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Anti-cyclonic 05 to 15, becoming N to NE 15 to 25 in the
south-west but SE 15 to 25 in the north from tomorrow morning.
VIS : Good but moderate in showers and thundershowers in places in
the west.
SEA STATE: 3.0 to 4.0m in places in the east at first, with SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 05 to 15, reaching 20 to 25 in the south-east.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : S to SE 05 to 15, reaching 20 to 25 in the north.
VIS : Good but moderate in showers and thundershowers in the
North-east.
SEA STATE: 3.0m in the south at first with S to SW swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Variable 05 to 10 in the north at first, otherwise W to NW 20
to 30, reaching 35 to 40 in the central and southern half
spreading to the east from mid-period.
VIS : Good but moderate in rain and snow-showers over the southern
parts.
SEA STATE: 4.0 to 5.0m reaching 6.0 to 7.0m in the in the southern parts,
but 7.5 to 8.0m in the south-east until 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)
26/09/24 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 OVER RUNNING OVER KER.- STRONG GALE EXPECTED OVER CRO.
PART 2: GENERAL SYNOPSIS, 26/09/24 AT 0000UTC
- DEEPENING LOW 1011 HPA OVER WAM.- COLD FRONT AXIS 38S/40E, 44S/55E, 53S/65E, MOVING EASTWARD 20/25 KT.- HIGH 1035 HPA OVER EASTERN AMS.
PART 3: FORECAST FOR 24 HOURS FROM 26/09/24 AT 0600UTC TO 26/09/25 AT 0600UTC
WAM (30S/40S, 50E/65E)
SHOWERS OR SQUALLS.
WIND : CLOCKWISE 3 TO 5 AT TIMES 6, SETTING UP S 3 OR 5 SOON. GUSTS IN
SQUALLS.
SEA : ROUGH BECOMING MODERATE OVER NORTHERN AREA. SW SWELL 2 TO 3
METERS.
VIS : POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SHOWERS OR SQUALLS.
WIND : N 3 TO 5, INCREASING LOCALLY 6 TO 7 OVER SOUTHERN AREA BACKING SW
5/6 OVER WESTERN AT END.
SEA : ROUGH TO VERY ROUGH, BECOMING ROUGH OR TEMPORARILY MODERATE OVER
NORTHERN AREA SOON. SW SWELL 2 TO 4 METERS ABATING.
VIS : POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
FRONTAL SHOWERS, OCCASIONALLY SNOWY.
WIND : NW 6 TO 7 AHEAD THE FRONT BACKING SW THEN W 6 TO 7 , LOCALLY 8/9 .
GUSTS.
SEA : ROUGH TO VERY ROUGH, HIGH OVER SOUTHERN AREA. SW SWELL 4 TO 6 M. VIS : POOR TO VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
FRONTAL SHOWERS, OCCASIONALLY SNOWY.
WIND : NW 6 TO 7 AT TIMES 8 AHEAD THE FRONT S 3 TO 5 BEHIND AND
INCREASING NW 6/7 OVER SOUTHWESTERN AREA AT END. GUSTS.
SEA : ROUGH TO VERY ROUGH LOCALLY HIGH OVER SOUTHWESTERN AREA. SW SWELL
3 TO 5M.
VIS : POOR TO VERY POOR IN PRECIPITATION.