WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
31st OF AUGUST 2026 AT 16:40 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 312200 TO 012200 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 : W to NW 35 in places in the south until mid-period.
2. MARION FORTIES EAST : N to NW 35 to 40 in the western parts towards
mid-period. It will become W to SW 35 to 45 in
the south-west from mid-period but 50 to 55 in
places in the extreme south-west from mid-
period.
SYNOPTIC CHART 12:00Z
=====================
High 1031 hPa 30s00w, High 1037 hPa 31s68e.
Low 982 hPa 48s09e, Low 976 hPa 56s21e, Low 1014 hPa 39s51e.
1. Cold front: 35s15w 37s08w 41s02w 45s10w into 48s09e.
2. Cold front: 43s31e 50s34e 55s31e into 56s21e.
3. Cold front: 30s37e 33s42e 36s47e into 39s51e.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 15 to 20.
VIS : Good.
SEA STATE: 3.0m in places in the central and west at first, with SE
swell.
ANGOLA (06S/15S, 00E/00N):
WIND : SE 10 to 20, but S to SW 05 to 15 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : Anticyclonic 05 to 15 in the south, otherwise E to SE 15
to 25.
VIS : Good.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 15 to 25 reaching 30 in places in the east.
VIS : Good.
SEA STATE: 3.0 to 3.5m except in the south-west, with S to SE swell.
TRISTAN (30S/40S, 00E/20W):
WIND : N to NW 15 to 25 in the north across the central to the south-
east until mid-period but W to SW 10 to 20 in the south-
central until mid-period, otherwise Anticyclonic 05 to 15.
VIS : Good but moderate in showers and rain in the west across the
central to the south-east.
SEA STATE: 3.0 to 4.0m in the south-east until mid-period, with W to SW
swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anticyclonic 05 to 15 in the north-western parts but S to SE
15 to 25 in the north-east, otherwise W to NW 15 to 25. It
will become SW 05 to 15 in the south-west towards mid-period
spreading to the central towards the end of the period.
VIS : Moderate in showers and rain in the western and southern parts
toward mid-period, otherwise good.
SEA STATE: 3.0 to 4.0m except in the northern parts reaching 4.5 to 5.5m
in places in the south, with W to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Anticyclonic 05 to 15 in the north-western parts at first,
otherwise W to NW 15 to 25 reaching 30 to 35 in places in the
south until mid-period. It will become S to SE 15 to 25 in the
south-west towards the end of the period.
VIS : Good becoming moderate in showers and rain in the south-west
and south-central from mid-period.
SEA STATE: 3.0 to 4.0m except in the northern parts, reaching 4.5 to 5.5m
in the south-west and south-central parts, with W to SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Anticyclonic 05 to 15 in the central parts, otherwise E to NE
10 to 20.
VIS : Good but moderate to poor in showers and thundershowers in
places in the south-east until mid-period.
MOZAMBIQUE CHANNEL:
WIND : E to NE 05 to 15 in the western parts at first, otherwise S to SE
05 to 15.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 15 to 25, but E to NE 10 to 20 in the south.
VIS : Moderate in showers and rain in places, otherwise good.
SEA STATE: 3.0 to 3.5m except in the south, with E to SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : N to NW 15 to 25 reaching 30 to 40 in the western parts
towards mid-period. It will become W to SW 20 to 30
west reaching 35 to 45 in the south-west from mid-period but
50 to 55 in places in the extreme south-west from mid-period.
VIS : Moderate in showers and rain in the west spreading to the
central from mid-period and to the east towards the end of the
period, otherwise good. Possible snow showers in the south-
west towards the end of the period.
SEA STATE: 3.5 to 4.5m at first becoming 5.0 to 6.0m towards mid-
period, reaching 6.0 to 9.0m in the west from mid-period,
spreading to the central towards the end of the period,
with W to NW swell but SW swell in the west towards the end of
the period.
AREA 2:
=======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA
ACK (AMSTERDAM-CROZET-KERGUELEN)
26/08/31 AT 1600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE RUNNING OVER KER AND EXPECTED OVER SOUTHWESTERN CRO AT END.
PART 2: GENERAL SYNOPSIS, 26/08/31 AT 1200UTC
- WAVING FRONT AXIS 40S/54E, 43S/62E, 44S/74E, 45S/81E, WITH
DEEPENING LOW EXPECTED LOW1000 HPA OVER KER AT END.- HIGH 1037 HPA
AXIS 32S/68E ALMOST STATIONARY.- COLD FRONT EXPECTED OVER
SOUTHWESTERN CRO AT END.
PART 3: FORECAST FOR 24 HOURS FROM 26/08/31 AT 1800UTC TO 26/09/01
AT 1800UTC
WAM (30S/40S, 50E/65E)
FRONTAL RAIN, SHOWERS AND SQUALLS.WIND: ANTICLOCKWISE 3 TO 5 OVER
NORTHERN AND INCREASING NW 6 TO 7 WITH GUSTS OVER SOUTHERN.SEA:
MODERATE IN NORTH, ROUGH TO VERY ROUGH IN SOUTH. VISI: POOR IN
PRECIPITATION.
AMS (30S/40S, 65E/80E)
FRONTAL SHOWERS OVER SOUTHWESTERN AREA AT END.WIND: ANTICLOCKWISE 3
OR 5 IN NORTH INCREASING NW 6/7 IN SOUTHERN AREA SOON.SEA: MODERATE
TO ROUGH AND VERY ROUGH OVER SOUTHERN AT TIMES. SW SWELL BETWEEN, 2
TO 4 METERS .VISI: POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
FRONTAL RAIN AND SHOWERS OVER NORTHERN AND EASTERN AREA. FRONTAL RAIN
AND SHOWERS IN SOUTHWESTERN AREA AT END.WIND: ANTICLOCKWISE 3 TO 5,
INCREASING NW 6/7OVER NORTHEASTERN AND NW 6/7 AT TIMES 8 OVER WESTERN
AREA AT END. GUSTS.SEA: ROUGH OR VERY ROUGH.SW SWELL 2 TO 4 METERS IN
SOUTH.VISI : POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
FRONTAL RAIN AND SHOWERS.WIND:, AT FIRST NW 6/7 IN NORTH, SW 6/7 AT
TIMES 8 IN SOUTH, BECOMING LATER CLOCKWISE 6/7 AT TIMES 8 BY
NORTHWESTERN AREA . GUSTS.SEA: VERY ROUGH OR HIGH FROM NORTH TO
SOUTH. SW SWELL 4 TO 5 METERS.VISI: POOR OR VERY POOR IN
PRECIPITATION.