WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
29th OF AUGUST 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 291000 TO 301000 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. TRISTAN: NW to W 35 in the south-west from mid-period.
2. CAPE EAST: N to NW 35 over the central and south-eastern parts.
3. MARION FORTIES EAST: NW to W 35 to 40 in the north-west spreading to
the central and eastern parts by mid-period.
SYNOPTIC CHART 06:00Z
=====================
High 1033 hPa 33s12w High 1040 hPa 35s52e.
Low 1008 hPa 41s18e.
1. Cold front: 34s16e 38s19e 41s20e into 41s18e.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 15 to 25.
VIS : Good.
SEA STATE: 3.0 to 3.5m, with S to SE swell.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SW 05 to 10 in the extreme east, otherwise but S to SE 10
to 15 reaching 20 in the south-west.
VIS : Good.
SEA STATE: 3.0m in the extreme south-west, with S to SW swell.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 15 to 25.
VIS : Good.
SEA STATE: 3.0 to 3.5m, subsiding in the south-west from mid-period, with
SW to S swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 15 to 25 reaching 30 in the south-east from mid-
period.
VIS : Good.
SEA STATE: 3.0 to 4.0m, with S swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Anticyclonic 05 to 15 over the northern half, otherwise NW to
W 15 to 25 reaching 30 to 35 in the south-west from mid-
period.
VIS : Good.
SEA STATE: 3.0 to 3.5m, except in the north, reaching 4.0 to 5.0m in the
south-west from mid-period, with SW to W swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : SW to S 15 to 25 but SE 10 to 20 in the north-west. It will
become W 15 to 25 in the south from mid-period.
VIS : Good, but moderate in showers in the south-east.
SEA STATE: 3.0 to 3.5m reaching 4.0m in the south, with SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NW 15 to 25 reaching 30 to 35 over the central and south-
eastern parts but W to SW 20 to 30 in the west.
VIS : Good over the eastern parts, otherwise moderate in showers and
rain.
SEA STATE: 3.0 to 4.0m, reaching 4.5m over the central and south-eastern
parts, with SW to W swell but N to NE swell over the central
parts.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : E to NE 15 to 25 reaching 30 over the central and south-
western parts. It will become SW 20 to 30 in the extreme
south-west from mid-period.
VIS : Good.
SEA STATE: 3.0 to 3.5m, with E to NE swell in the west, otherwise S
to SW swell.
MOZAMBIQUE CHANNEL:
WIND : Variable 05 over the central and western parts, otherwise E 10 to
15 but SE 10 to 20 in the extreme north-east.
VIS : Good.
SEA STATE: 3.0 to 3.5m in the south for the first half of the period, with S
to SE swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 20 to 25.
VIS : Moderate in showers and rain.
SEA STATE: 3.5 to 4.5m, with S to SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : SW 10 to 20 in the south-west, otherwise NW to W 20 to 30
reaching 35 to 40 in the north-west spreading to the central
and eastern parts by mid-period.
VIS : Good in the north-east, otherwise moderate to poor in showers
and rain.
SEA STATE: 3.5 to 4.5m reaching 5.5 to 6.5m over the north-western parts
spreading to the central and eastern parts by mid-period, with
NW swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/08/29 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- LOCALLY GALE EXPECTED OVER CRO AND KER AT THE END.
PART 2: GENERAL SYNOPSIS, 26/08/29 AT 0000UTC
- HIGH 1039 HPA NEAR 35S/50E EXPECTED 1040 HPA NEAR 33S/61E AT THE
END.- COLD FRONT OVER SOUTHERN CRO AND SOUTHERN KER.
PART 3: FORECAST FOR 24 HOURS FROM 26/08/29 AT 0600UTC TO 26/08/30 AT 0600UTC
WAM (30S/40S, 50E/65E)
WIND: ANTICLOCKWISE 3 TO 5 BY WESTERN. INCREASING NORTH-WESTERLY 5 TO 6 OVER SOUTH-WESTERN AT THE END.
SEA: ROUGH TO VERY ROUGH BECOMING MODERATE TO ROUGH AT THE END. LONG SOUTH-WEST SWELL 3 TO 5 M ABATING.
VIS: GOOD.
AMS (30S/40S, 65E/80E)
SCATTERED SHOWERS.
WIND: SOUTHERLY 5 TO 6, SETTING-UP ANTICLOCKWISE 3 TO 4 BY WESTERN OVER NORTHERN AT THE END AND WESTERLY 5 TO 6 OVER SOUTHERN AT THE END.
SEA: ROUGH TO VERY ROUGH. LONG SOUTH-WEST SWELL 4 TO 5 M ABATING.
VIS: POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
FRONTAL SHOWERS AND RAIN OVER SOUTHERN,
WIND: WESTERLY TO NORTH-WEST 5 TO 6 INCREASING 6 TO 7 LOCALLY 8 WITH GUSTS LATER.
SEA: ROUGH TO VERY ROUGH. LONG SOUTH-WEST SWELL 4 M, ABATING LATER.
VIS: POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
FRONTAL SHOWERS AND RAIN OVER SOUTHERN. SCATTERED SHOWERS
ELSEWHERE.
WIND: WEST TO SOUTH-WEST 5 TO 6 INCREASING 6 TO 7 LOCALLY 8 WITH GUSTS AT THE END.
SEA: ROUGH TO VERY ROUGH. LONG WESTERLY SWELL,
3 TO 5 M ABATING.
VIS: POOR IN PRECIPITATION.