WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
13th OF SEPTEMBER 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 132200 TO 142200 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: N to NW 35 in the south-east at first.
2. CAPE WEST: E to NE 35 in the south-east at first, but W to NW 35 in
the south-west at first, spreading to the south from mid-
period, as well as south-east by the end of the period.
3. CAPE EAST: E to NE 35 to 40 in the west and north, spreading to the
central parts from the morning, while moderating in the
west, but S to SW 35 in the south-east at first.
4. DURBAN EAST: E to NE 35 to 40 in the south-west.
5. MOZAMBIQUE CHANNEL: S to SE 35 in the south-east.
6. MARION FORTIES EAST: W to SW 35 to 40 in the south and eastern
parts at first, becoming W to NW 35 to 40 in
the west towards the end of the period.
SYNOPTIC CHART 12:00Z
=====================
High 1028 hPa 40s30e
Low 1004 hPa 32s10e, Low 980 hPa 44s05w
1. Cold Front: 26s30w 30s20w 34s15w 40s07w into 44s05w
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : S to SE 05 to 15.
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 : N to NW 15 to 25 in the southern parts, otherwise anti-
cyclonic 05 to 15. It will become SW 15 to 25 in the south-
west from the morning.
VIS : Good but moderate in showers and rain in the south and south-
west, spreading to the south-east towards the end of the
period, while clearing in the south-west.
SEA STATE: 3.0 to 4.0m in the south and south-west, with SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 05 to 15, but W to NW 15 to 25 in the southern parts.
VIS : Good but moderate in showers and thundershowers in the south
and south-east at first.
SEA STATE: 3.0 to 4.0m in places in the southern parts at first, with S
to SE swell.
TRISTAN (30S/40S, 00E/20W):
WIND : N to NW 15 to 25 in the eastern parts, reaching 35 in the
south-east at first, otherwise S to SW 15 to 25, reaching 30
in the southern parts at times.
VIS : Good but moderate to poor in showers and rain in the north,
east and southern parts.
SEA STATE: 3.0 to 4.0m reaching 4.5 to 5.0m in the southern parts, with W
to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : E to NE 20 to 30 in the south-east, reaching 35 at first,
otherwise W to NW 15 to 25, reaching 30 to 35 in the south-
west at first, spreading to the south from mid-period, as well
as south-east by the end of the period.
VIS : Good but moderate to poor in showers and thundershowers in the
eastern parts until in the evening, but moderate in showers
and rain in the west and south-west, spreading to the south
from mid-period.
SEA STATE: 3.0 to 4.0m reaching 4.5 to 5.0m in the south-east at first,
as well as south-west from the afternoon, with E to NE swell
in the south-east, otherwise W to SW.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : E to NE 20 to 30 in the west and north, reaching 35 to 40,
spreading to the central parts from the morning, while
moderating in the west, but S to SW 20 to 30 in the east and
south-east, reaching 35 in the south-east at first, otherwise
anti-cyclonic.
VIS : Good but moderate to poor in showers and thundershowers in the
central, north and western parts.
SEA STATE: 3.0 to 4.0m reaching 5.0 to 6.0m in places in the east and
western parts, spreading to the south and central parts from
mid-period, with SW swell in the east and south, but E to NE
in the west and central parts.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : SW 15 to 25 in the south-east, but S to SE 20 to 30 in the
central and northern parts, otherwise E to NE 15 to 25,
reaching 30 to 40 in the south-west.
VIS : Good but moderate in showers and rain in the north-east, west
and south-west.
SEA STATE: 3.0 to 4.0m, reaching 4.5 to 5.5m in the south-east and south-
west, with E to NE swell, but SW in the south-east.
MOZAMBIQUE CHANNEL:
WIND : E to NE 15 to 25 in the south-west, otherwise S to SE 15 to
25, reaching 30 to 35 in the south-east.
VIS : Good.
SEA STATE: 3.0 to 4.0m in the south and south-east, reaching 4.5m in the
south-east from the afternoon, with SE swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : Variable 05 to 10 in the south at first, otherwise S to SE 15
to 25, reaching 30 in the north-west at times.
VIS : Moderate in showers and rain in places.
SEA STATE: 3.0 to 3.5m in the south from the morning, with SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to SW 20 to 30 reaching 35 to 40 in the south and eastern
parts at first. It will become W to NW 20 to 30 in the west
from the morning, reaching 35 to 40 towards the end of the
period.
VIS : Good but moderate in rain and snow-showers over the south and
eastern parts until mid-period, as well as in the west by the
end of the period.
SEA STATE: 4.0 to 6.0m reaching 7.0 to 8.0m in the east during the first
half of the period, with W to SW swell.
AREA 2:
======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK AMSTERDAM-CROZET-KERGUELEN)
26/09/13 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (Wind gusts may be about 40% stronger than the averages given here).
PART 1: WARNING
- Gale expected over WAM at end.- Gale continuing over CRO.- Gale or strong gale continuing over KER.
PART 2: GENERAL SYNOPSIS, 26/09/13 AT 0000UTC
- Low 981 near 44S/72E, moving south eastward and deepening, expected 966 near 49S/82E at 18UTC. Associated cold front spreading over NW.- Cold front axis 38S/50E, 45S/57E, moving eastward.- Deepening low expected 979 near 46S/75E at 06UTC the 09/14. Associated cold front spreading over N.
PART 3: FORECAST FOR 24 HOURS FROM 26/09/13 at 0600UTC to 26/09/14 at 0600UTC
WAM (30S/40S, 50E/65E)
Frontal rain or showers.
WIND : SW 5 or 6, at times over southwestern, soon increasing SW 6 or 7,
then 7 or 8 at end. Severe gusts.
SEA : rough or very rough, increasing very rough or high over southern
at end. SW swell 3 or 4 meters at first, decreasing, then new SW
swell 4 or 5 meters over western at end.
VIS : poor with precipitation.
AMS (30S/40S, 65E/80E)
Frontal rain or showers.
WIND : NW 5 or 6, locally 7 ahead the front, backing SW 5 or 6 behind the
front, increasing W 6 or 7 from west later. Gusts.
SEA : rough or very rough. SW swell 3 to 5 meters, decreasing later.
VIS : poor with precipitation.
CRO (40S/50S, 50E/65E)
Frontal rain or showers. Snow showers over southern.
WIND : W 5 or 6 over eastern, 6 or 7, at times 8, over western, soon
increasing 7 or 8. Severe gusts.
SEA : rough or very rough, soon becoming high from west. Cross sea later
with W swell 5 or 6 meters over western.
VIS : poor with precipitation.
KER (40S/50S, 65E/80E)
Frontal rain or showers. Few snow showers over southern.
WIND : clockwise 7 or 8, at times 9, over eastern at first, but SW 4 or 5
over western, later increasing from west NW 6 or 7, at times 8,
ahead the front, backing SW 6 or 7 behind the front. Severe gusts.
SEA : rough to very rough, locally high over northern the low. SW swell
3 to 4 meters.
VIS : poor with precipitation.