WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
11TH 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 102200 TO 112200 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: W to NW 35 to 40 in the places in the west, south and central
parts.
2. CAPE WEST: E to NE 35 at times in the east and south-east
3. DURBAN EAST: S to SE 35 in places in the north-west.
4. MARION FORTIES EAST: W to SW 35 in places over the southern parts.
SYNOPTIC CHART 06:00Z
=====================
High 1042 hPa 39s25e.
Low 986 hPa 43s22w.
Cold Front: 25s25w 30s20w 34s18w into 43s22w
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 10 to 20.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 05 to 15 but SW 05 to 10 in the east.
VIS : Good.
SEA STATE: 3.0 in the south, with S to SE swell.
ST HELENA (15S/30S, 00E/20W):
WIND : NE 10 to 20 in the south-east, otherwise E to SE 15 to 25 but
N to NW 15 to 25 in the south-west and south, reaching 30 at
first, but W to SW 15 to 25 in the extreme south-west
spreading to the west and south from mid-period.
VIS : Good, but moderate to poor in showers and thundershowers the
south-west, west and south.
SEA STATE: 3.0 to 4.0m, reaching 4.5 to 5.5m in the south-west, with E to
SE swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 15 to 25 reaching 30 in the southern parts for the
first half of the period becoming variable 05 to 15 towards
the end of the period.
VIS : Good
SEA STATE: 3.0 to 4.0m, with SE swell.
TRISTAN (30S/40S, 00E/20W):
WIND : NE 15 to 25 in the eastern parts, otherwise
W to NW 15 to 25 reaching 30 to 40 in the places in the west,
south and central parts.
VIS : Good but moderate to poor in showers and thundershowers in
places.
SEA STATE: 3.0 to 4.0m, reaching 5.0 to 6.0m in the western and central
parts spreading to the southern parts towards mid-period, with
W to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : E to NE 15 to 25, reaching 30 to 35 at times in the east and
south-east, but SE 15 to 25 in the north and north-east
becoming N to NW 15 to 25 in the western parts towards the
end of the period.
VIS : Good.
SEA STATE: 3.0 to 4.0m, reaching 4.5 to 5.0 in the south-east and south-
west, with E to SE swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : S to SE 15 to 25 but E to NE 15 to 25 in the west, reaching 30
in the north-west at times.
VIS : Good but moderate in showers and rain in the northern and
eastern parts at times.
SEA STATE: 3.0 to 4.0m, with W to SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : S to SE 15 to 25, reaching 30 to 35 in places in the north-
west but variable 05 to 10 in the north-east.
VIS : Good but moderate to poor in showers and thundershowers in
places.
SEA STATE: 3.0 to 4.0m, reaching 4.5 to 5.5m over the western parts, with
S to SE swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 05 to 15, reaching 25 to 30 in places in the south.
VIS : Good, becoming moderate to poor in showers and thundershowers
over the south-west and south.
SEA STATE: 3.0 to 4.0m in the southern parts, with S to SE swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 10 to 20, but variable 05 to 15 in the south.
VIS : Good, but moderate in showers and rain in in places.
SEA STATE: 3.0m in the eastern and northern parts, with E to SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to SW 15 to 25 reaching 30 to 35 in places over the southern
parts.
VIS : Moderate in showers and rain in places in the northern parts,
with possible snow-showers in the south-east at first.
SEA STATE: 3.0 to 4.0m reaching 4.5 to 5.5m in the southern 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)
26/08/11 AT 0500UTC
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 CRO LATER.
PART 2: GENERAL SYNOPSIS, 26/08/11 AT 0000UTC
- COLD FRONT WITH THUNDERY SQUALLS AXIS 30S/44E, 36S/51E, 44S/65E, 49S/82E, MOVING EASTWARD 10/15 KT.
PART 3: FORECAST FOR 24 HOURS FROM 26/08/11 AT 0600UTC TO 26/08/12 AT 0600UTC
WAM (30S/40S, 50E/65E)
FRONTAL RAIN, SHOWERS. SQUALLS.
WIND : N 4 TO 6 AHEAD THE FRONT BACKING S 4 TO 6 AT TIMES 7 BEHIND.
GUSTS.
SEA : MODERATE TO ROUGH, LOCALLY VERY ROUGH OVER NORTHWESTERN AREA AT
END. SW SWELL 2 TO 3 METERS.
VIS : POOR OR VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SCATTERED SHOWERS THEN FRONTAL SHOWERS OVER SOUTHWESTERN AREA AT END.
WIND : ANTICLOCKWISE 3 TO 5,INCREASING NW 5 TO 6 AT TIMES 7 OVER
SOUTHERN AREA.
SEA : MODERATE TO ROUGH.
VIS : POOR IN SHOWERS.
CRO (40S/50S, 50E/65E)
FRONTAL RAIN, SHOWERS AND SQUALLS OVER NORTHEASTERN AREA AT FIRST.
WIND : NW 6 TO 7 OVER FAR NORTHEASTERN AREA, BACKING SOUTHWEST 4 TO
6 BEHIND, INCREASING W 6 TO 7 AT TIMES 8 OVER SOUTHERN AREA
SOON. GUSTS.
SEA : ROUGH TO VERY ROUGH. SW SWELL BETWEEN 2 TO 4 METERS.
VIS : POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
FRONTAL RAIN AND SHOWERS.
WIND : NW 6 TO 7 AT TIMES 8 BACKING SW 4 TO 6 BEHIND AND INCREASING W
6 TO 7 AT TIMES 8 OVER SOUTHERN AREA AT END. GUSTS.
SEA : ROUGH TO VERY ROUGH. WESTERLY SWELL 3 TO 5 METERS.
VIS : POOR IN PRECIPITATION.