WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
10TH 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 101000 TO 111000 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. TRADES: S to SE 35 in the central and south-eastern parts until mid-
period.
2. TRISTAN: N to NW 35 to 40 in the places in the west and central parts.
3. DURBAN EAST: S to SW 35 at first, otherwise S to SE 35 in places in
the central-west spreading to the north-west from mid-
period.
4. MARION FORTIES EAST: S to SW 35 in places in the south-west towards
the end of the period.
SYNOPTIC CHART 06:00Z
=====================
High 1043 hPa 38s09e, High 1046 hPa 38s83e.
Low 946 hPa 46s26w, Low 984 hPa 60s42e.
1. Cold Front: 33s20w 37s18w 41s16w 48s13w 51s19w into 46s26w
2. Cold Front: 40s36e 46s44e 51s48e 57s48e into 60s42e.
AREA FORECAST:
==============
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, otherwise E to SE 15 to 25. It will
become N to NW 15 to 25 in the south-west from mid-period
reaching 30 in the extreme south-west towards the end of the
period.
VIS : Good, becoming moderate to poor in the south-west from mid-
period.
SEA STATE: 3.0 to 4.0m in the central and eastern parts and south-west
towards the end of the period, with E to SE swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 15 to 25 reaching 30 to 35 in the central and south-
eastern parts until mid-period.
VIS : Good, but poor in blowing dust in the south-east until
mid-period.
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 places in the west and
central parts.
VIS : Good but moderate to poor in showers and thundershowers in the
west across the central to the south, spreading to the south
central from mid-period, while clearing in the south-west.
SEA STATE: 3.0 to 4.0m, reaching 5.0 to 7.0m in the south-west, with W to
NW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : E to SE 15 to 25 in the east and northern parts reaching 30 at
times and 30 to 35 in the east towards the end of the period,
otherwise anti-cyclonic 05 to 15. It will become NE 10 to 20
in the south-west from mid-period.
VIS : Good.
SEA STATE: 3.0 to 4.0m except in the west and central parts, reaching 4.5
in places in the north towards the end of the period, with E
to SE swell in the north but SW swell in the south-east.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NW 15 to 25 in the east until mid-period, otherwise E to
SE 15 to 25, reaching 30 in the central parts until mid-
period. It will become anticyclonic 05 to 15 in the south-west
towards the end of the 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 for the first-half of the period.
SEA STATE: 3.0 to 4.0m, reaching 4.5 to 5.0m in the places western and
central parts, with W to SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : S to SW 15 to 25 in the north-west for the first-half of the
period, reaching 30 to 35 at first, otherwise S to SE 15 to
25, reaching 30 to 35 in places in the central-west spreading
to the north-west from mid-period but N to NE 10 to 20 in the
east.
VIS : Good but moderate to poor in showers and thundershowers in the
west and central parts.
SEA STATE: 3.0 to 4.0m in the west spreading to the central from mid-
period, reaching 4.5 to 5.5m in the west, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : N to NE 10 to 20 in the west and south-west but variable 05 to
10 over the central. It will become E to SE 10 to 20 towards
the end of the period.
VIS : Good, becoming moderate to poor in showers and thundershowers
over the south-west.
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 eastern parts, with E to SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : S to SW 15 to 25 reaching 30 in the south-east at first and 35
in places in the south-west towards the end of the period.
VIS : Moderate in showers and rain in places in the south, with
possible snow-showers in the south.
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:
=======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/08/10 AT 0400UTC
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 CRO and KER
PART 2: GENERAL SYNOPSIS, 26/08/10 AT 0000UTC
- Cold front with thundery squalls axis 44S/49E, 47S/57E, 49S/63E, 54S/76E, moving Eastward 10/15 kt.
- High 1045 hPa near 39S/81E, moving Eastward 15 kt.
PART 3: FORECAST FOR 24 HOURS FROM 26/08/10 at 0600UTC to 26/08/11 at 0600UTC
WAM (30S/40S, 50E/65E)
Frontal rain, showers and squalls under CF by Western area.
WIND : Anticlockwise 3 to 5 increasing N 5 to 6 ahead CF backing S 4 to
5 behind CF by South-Western area at end.
SEA : Moderate to rough. NE swell 2 meters over Northern area but SW
swell 2 to 3 meters over Southern area.
VIS : Poor or very poor in precipitation.
AMS (30S/40S, 65E/80E)
Scattered showers.
WIND : Anticlockwise 3 to 5 becoming NW 5 to 6 by Western area.
SEA : Moderate to rough. SW swell 2 meters.
VIS : Good.
CRO (40S/50S, 50E/65E)
Frontal rain, showers and squalls under CF.
WIND : NW 5 to 6 at times 7/8 ahead CF and backing gradually SW 4 to 6
behind. Gusts.
SEA : Rough to very rough. SW swell between 2 to 4 meters.
VIS : Poor or very poor in precipitation.
KER (40S/50S, 65E/80E)
Scattered showers but frontal rain and showers under CF by South-Western area at end.
WIND : NW 5 to 6 increasing NW 7/8 ahead CF then backing SW 5 to 6
behind. Gusts.
SEA : Rough to very rough locally very rough. SW swell 2 to 4 meters.
VIS : Poor to very poor under precipitation.