WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
09TH OF AUGUST 2026 AT 13:30 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 092200 TO 102200 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. TRADES: S to SE 35 to 40 in the central and south-eastern parts.
2. TRISTAN: N to NW 35 to 40 in the west and south-west, moderating in
the south-west from the afternoon.
3. CAPE EAST: N to NW 35 to 40 in the south-east at first, but S to SE
35 in the north-west and central parts, moderating in the
central parts from mid-period.
4. DURBAN EAST: S to SW 35 to 40 in places in the west and south-
western parts.
5. MARION FORTIES EAST: S to SW 35 in the south and south-west at
first.
SYNOPTIC CHART 12:00Z
=====================
High 1040 hPa 38s05e, High 1047 hPa 42s79e.
Low 1006 hPa 52s55e, Low 982 hPa 59s32e.
1. Cold Front: 35s33e 40s40e 44s48e into 52s55e.
2. Cold Front: 42s21e 47s29e 52s35e 56s37e into 59s32e.
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 15 to 25.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 05 to 15 but SW 05 to 15 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : NE 10 to 20 in the south-west, otherwise E to SE 15 to 25,
reaching 30 in the east.
VIS : Good.
SEA STATE: 3.0 to 4.0m in the central and eastern parts, with E to SE
swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 15 to 25 reaching 30 to 40 in the central and south-
eastern parts.
VIS : Good.
SEA STATE: 3.0 to 4.0m, reaching 4.5 to 5.5m in the east, south and
central parts, with SE swell.
TRISTAN (30S/40S, 00E/20W):
WIND : E to NE 15 to 25 in the north and north-east, otherwise N to
NW 15 to 25 reaching 30 to 40 in the west and south-west,
moderating in the south-west from the afternoon.
VIS : Good but moderate to poor in showers and thundershowers in the
west and south-west, spreading to the south from mid-period,
while clearing in the south-west.
SEA STATE: 3.0 to 4.0m in the west and south-west, reaching 5.0 to 7.0m
in the south-west, spreading to the west and south from mid-
period, with W to NW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : SW 15 to 25 in the south-east at first, but S to SE 15 to 25
in the east and northern parts reaching 30 at times, otherwise
anti-cyclonic 05 to 15.
VIS : Good but moderate in showers and rain in the south-east until
mid-period.
SEA STATE: 3.0 to 4.0m except in the west and south-west, reaching 4.5 to
5.5m in places in the south-east until in the evening, with W
to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NW 15 to 25 in the east, reaching 30 to 40 in the south-
east at first, otherwise S to SE 15 to 25, reaching 30 to 35
in the north-west, and central parts, moderating in the
central parts from mid-period.
VIS : Good but moderate in showers and rain in the west, but
moderate to poor in showers and thundershowers over the
central and eastern parts. Clearing in the west and south-west
from mid-period.
SEA STATE: 3.5 to 4.5m, reaching 5.0 to 5.5m in the places in the north-
west and western half, subsiding in the north-west from the
afternoon, with W to SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : N to NE 10 to 20, reaching 25 to 30 in places in the east at
first, becoming variable 05 to 10 in the central and northern
parts from the morning, but S to SW 20 to 30 in the west and
south-west, reaching 35 to 40 in places.
VIS : Good but moderate to poor in showers and thundershowers in the
south, west and south-west.
SEA STATE: 3.0 to 3.5m in the central, south and western parts, reaching
4.0 to 6.0m in the south-west, spreading to the west from mid-
period, with S to SW Swell.
MOZAMBIQUE CHANNEL:
WIND : N to NE 10 to 20 in the west and south-west, otherwise
variable 05 to 10.
VIS : Good, becoming moderate to poor in showers and thundershowers
over the south-west from mid-period.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 15 to 25, but NE 15 to 25 in the south.
VIS : Moderate in showers and rain in in places.
SEA STATE: 3.0m in the north and southern parts, with E to SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : N to NW 20 to 30 in the south-east and north-east at first,
but variable 05 to 10 in the central and eastern parts until
mid-period, otherwise S to SW 15 to 25 reaching 30 to 35 in
the south and south-west at first.
VIS : Moderate in showers and rain in places, with possible snow-
showers in the south and west, becoming poor in showers and
thundershowers in the north-east from the morning until in the
afternoon.
SEA STATE: 3.5 to 4.5m reaching 5.0 to 6.0m in the south and western
parts, 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)
26/08/09 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (Wind gusts may be about 40% stronger than the averages given here).
PART 1: WARNING
- Gale over CRO then KER.
PART 2: GENERAL SYNOPSIS, 26/08/09 AT 0000UTC
- Cold front CF axis 43S/56E, 40S/56E, 35S/50E, moving slowly eastwards.
- High-pressure system 1041 hPa near 37S/71E, filling.
- High-pressure system 1044 hPa near 44S/73E, expected 1045 hPa near 39S/82E on the 10th at 06 UTC.
PART 3: FORECAST FOR 24 HOURS FROM 26/08/09 at 0600UTC to 26/08/10 at 0600UTC
WAM (30S/40S, 50E/65E)
Showers over southern with CF.
WIND : Northerly 5 to 6, occasionally freshening sometimes 7 over southern area with gusts.
SEA : Moderate to rough.
VIS : Poor during precipitation.
AMS (30S/40S, 65E/80E)
WIND : Anticlockwise 3 to 4 easterly force 5 to 6 over northern area, settling-up N force 3 to 5 over southern area.
SEA : Moderate to rough.
VIS : Good.
CRO (40S/50S, 50E/65E)
Rain and frontal showers with CF.
WIND: North-East 5 to 6, locally 7 setting-up North-West 5 to 6 by Western the front, backing South-West 4 to 5 behind by South-Western overnight.
SEA: Moderate or rough, locally very rough in south. SW swell 3 or 4 m in
south.
VIS : Poor in precipitation.
KER (40S/50S, 65E/80E)
Scattered showers.
WIND : Anticlockwise force 4 to 5, settling-up northerly force 6 to 7 from the west, settling-up north-west force 5 to 7 overnight and freshening NW force 7/8 from the north-west over southern areas at the end of the forecast period. Gusts.
SEA : Moderate to rough swell from the south-west, 2.5 to 3 m.
VIS : Poor during rainfall.