WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
27th 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 272200 TO 282200 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:
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1. DURBAN EAST: NE to E 35 in the extreme south-west at first.
SYNOPTIC CHART 12:00Z
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High 1022 hPa 22s17w, High 1036 hPa 39s38e.
Low 1017 hPa 37s17e, Low 993 hPa 43s07w.
1. Cold front: 30s19w 33s09w 39s04w 43s04w 43s09w into 43s07w.
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : S to SE 10 to 15.
VIS : Good.
SEA STATE: 3.0m in the south-west towards the end of the period, with SW
swell.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SW 05 to 10 but SE 10 to 15 in the south-west.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : SE 10 to 15 in the north, otherwise S to SW 05 to 15 becoming SE
05 to 15 in the south-west from mid-period.
VIS : Good but moderate in showers in the south-west until mid-period.
SEA STATE: 3.0 to 4.0m in the west and south, with SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : 05 to 15 NW in the south-west, where it will become SW to S by
mid-period, otherwise S to SE 10 to 20.
VIS : Good.
SEA STATE: 3.0m in the south-west from mid-period, with SW swell.
TRISTAN (30S/40S, 00E/20W):
WIND : SW to S 20 to 30 becoming 05 to 15 anticyclonic in the west from
mid-period.
VIS : Moderate in showers and thundershowers, until mid-period.
SEA STATE: 3.0 to 4.0m reaching 5.0m in the south and central parts,
spreading to the east by mid-period while subsiding in the
west, with SW to W swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : E to NE 10 to 20 in the north-east at first, otherwise NW to S 15
to 25, spreading to the central parts while becoming SW 15 to 25
in the west from mid-period.
VIS : Good, but moderate in showers and rain in the west, spreading to
the central parts by mid-period.
SEA STATE: 3.0 to 3.5m in the south and west, becoming 4.0 to 5.0m in the
south-west, with S to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : E to NE 20 to 30 in the west but S to SW 20 to 30 in the extreme
south-east and west, otherwise anticyclonic 05 to 15 becoming NW
to W 05 to 15 in the west towards end of period.
VIS : Good.
SEA STATE: 4.0 to 5.0m, reaching 6.0 to 7.0m in the east where it will be
subsiding towards end of period, with S to SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : S to SE 15 to 25 but NE to E 15 to 25 in the west reaching 30 to
35 in the extreme south-west at first.
VIS : Good.
SEA STATE: 3.0 to 4.0m, reaching 5.0m over the central-north and
eastern parts, with S to SW swell, but NE in the south-west.
MOZAMBIQUE CHANNEL:
WIND : S to SE 15 to 25 reaching 30 in the south-east and NW 15 in the
central-east from mid-period.
VIS : Good.
SEA STATE: 3.0 to 4.0m over the central and southern parts reaching 5.0m in
the south-east, with S swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 10 to 20 reaching 30 in the north-west.
VIS : Good but moderate in showers in the central parts by end of
period.
SEA STATE: 3.0 to 4.0m, reaching 5.0m in the extreme south spreading to the
central parts from mid-period, with SW swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : SW to W 15 to 25 in the east, otherwise N to NW 10 to 20 in the
west where it will be reaching 30 towards end of period.
VIS : Good, becoming moderate in rain in the south-west towards end of
period.
SEA STATE: 5.0 to 6.0m in the east at first subsiding to 3.0 to 4.0m towards
mid-period, with SW swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/08/27 AT 1600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (Wind gusts may be about 40% stronger than the averages given here).
PART 1: WARNING
Nil
PART 2: GENERAL SYNOPSIS, 26/08/27 AT 1200UTC
Low 950 hPa near 53S/85E associated with a cold front (CF) axis 47S/94E, 36S/75E, and 25S/58E, moving eastward at 2530 kt.- High 1036 hPa near 38S/38E, moving eastward at 5/10 kt.
PART 3: FORECAST FOR 24 HOURS FROM 26/08/27 at 1800UTC to 26/08/28 at
1800UTC
WAM (30S/40S, 50E/65E)
Scattered showers behind the front, more frequent over the eastern area.
WIND: SW to S 5/6, locally 7, soon decreasing to 5/6 and becoming
anticlockwise 3 to 5 over the western area at the end of the
period. Gusts.
SEA: Very rough to high, decreasing at the end of the period. Long
SW swell 4 to 6 m.
VIS: Poor in precipitations.
AMS (30S/40S, 65E/80E)
Rain, showers, and frontal showers ahead of the cold front. Scattered
showers behind it.
WIND: NW 5/6 ahead of front, backing westerly 4/5 behind it, then
increasing south-westerly 5/6, locally 7. Gusts.
SEA: Very rough, locally high over the south-western. Long SW
swell 4 to 6 m.
VIS: Poor in precipitations.
CRO (40S/50S, 50E/65E)
Scattered showers, snow.
WIND: SW 6/7, decreasing to 4 to 6 from west to east at the end
of the period. Gusts
SEA: High, decreasing. Long SW swell, 4 to 6 m, abating.
VIS: Poor in precipitations.
KER (40S/50S, 65E/80E)
Scattered showers and snow over southern.
WIND: Westerly 5 to 7; setting up SW 5/6, locally 7.
SEA: Very rough to high. Long westerly swell 4 to 6 m.
VIS: Poor in precipitations.