WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
18th OF OCTOBER 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 181000 TO 191000 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.CAPE EAST: SE to E 30 to 35 in the extreme central-north.
2.MARION FORTIES EAST: SW 35 in the south-east at first.
SYNOPTIC CHART 06:00Z
=====================
High 1029 hPa 33s05w High 1029 hPa 29s63e.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 10 to 20.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20 but SW 05 to 10 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 15 to 25 but NE 15 to 25 in the south-west becoming
N to NW 10 to 20 during second half of the period, spreading
to the south bu the end of the period.
VIS : Good but moderate in showers in the south-west.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 15 to 25 reaching 30 in places in the east.
VIS : Good.
SEA STATE: 3.0 to 3.5m reaching 4.0m in places in the east, with S to SW
swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Anticyclonic 05 to 15 in the north-east, otherwise W to NW 10
to 20 but NE 20 to 30 in the west spreading to the east by the
end of the period while becoming SE 10 to 20 in the extreme
south-west.
VIS : Good but moderate to poor in showers and rain in the north-
west spreading to the entire western and southern parts
towards the end of the period.
SEA STATE: 3.0 to 3.5m over the southern and eastern parts at first,
otherwise S to SW swell 3.0 to 3.5m in the north-west towards
the mid-period spreading to the west during the second
half of the period, with NW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anticyclonic 05 to 10 in the north-west otherwise W to SW 10
to 20 reaching 25 in the extreme south but S to SE
15 to 20 in the north-east.
VIS : Good but moderate in showers in the south.
SEA STATE: 3.0 to 3.5m in the south, with SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : NW 10 to 20 in the north, otherwise SE to E 15 to 25
reaching 30 to 35 in the extreme central-north
but variable 05 to 10 in the south-west at first becoming SW
10 to 20 by the end of the period.
VIS : Good but poor in showers and rain in the central and north
-west spreading to the south and west during the second half
of the period.
SEA STATE: 3.0 to 3.5m reaching 4.0m in the west and central
parts, with SW swell but NW swell in the east.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : NE 15 to 20 becoming S to SW 10 to 15 in the extreme south-
west by the end of the period.
VIS : Good, but moderate to poor in showers and thundershowers in
the extreme south-west.
SEA STATE: 3.5 to 4.0m over the extreme south-west by the end of the
period, with SW swell.
MOZAMBIQUE CHANNEL:
WIND : Variable 05 to 10 over the central and eastern parts,
otherwise E to NE 10 to 20.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : SE 10 to 20 in the north but NE 10 to 20 in the south.
VIS : Good.
SEA STATE: 3.0m in the northern parts, with SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : SW 15 to 25 reaching 30 to 35 in the south-east at first but anticyclonic 05 to
15 in the north becoming NW 10 to 20 in the south-west by the
end of
the period.
VIS : Good but moderate in showers and snow-showers in the south at
first becoming poor in the west towards the end of the period.
SEA STATE: 3.5 to 4.5m reaching 5.0 to 7.0m in the south, with W to SW
swell.
AREA 2:
======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/10/18 AT 0600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
STRONG GALE FORCE 9 OVER CRO AND KER.
PART 2: GENERAL SYNOPSIS, 26/10/18 AT 0000UTC
- HIGH 1028 HPA, NEAR 28S/64E, SLOW-MOVING.- LOW AT 946 HPA NEAR 54S/70E, MOVING EASTWARD 25 KT. ASSOCIATED COLD FRONT AXIS 53S/75E, 48S/81E, 47S/80E, 44S/73E.
PART 3: FORECAST FOR 24 HOURS FROM 26/10/18 AT 0600UTC TO 26/10/19 AT 0600UTC
WAM (30S/40S, 50E/65E)
SHOWERS OVER SOUTHERN.
WIND:NORTHERN HALF: NORTH TO NORTHWEST 3/4 OVER
WESTERN, WESTERLY 2/4 OVER EASTERN.SOUTHERN HALF: WEST TO NORTHWEST
5/6, DECREASING 3/4 AND BECOMING SOUTHERLY OVER FAR SOUTHERN.
SEA:MODERATE TO ROUGH FROM NORTH TO SOUTH. WEST TO SOUTHWEST SWELL 2 TO 3
METERS FROM NORTH TO SOUTH, INCREASING 3 TO 4 METERS OVER SOUTHERN AT
END.
VISI:MODERATE IN SHOWERS.
AMS (30S/40S, 65E/80E)
FEW SHOWERS OVER SOUTHERN.
WIND: WESTERLY, 4 TO 6 FROM NORTH TO SOUTH, WEAKENING 3/4 OVER
SOUTHWESTERN AT END.
SEA: MODERATE TO ROUGH FROM NORTH TO SOUTH,
BECOMING VERY ROUGH OVER FAR SOUTHERN AT END.
SOUTHWES SWELL, 2 TO 5 METERS FROM NORTH TO SOUTH.
VISI: MODERATE IN SHOWERS.
CRO (40S/50S, 50E/65E)
SCATTERED SHOWERS.
WIND:NORTHERN HALF: WESTERLY TO NORTHWESTERLY 4 TO
7 FROM NORTH TO SOUTH.SOUTHERN HALF: WESTERLY THEN SOUTHWESTERLY 6
TO 7 FROM NORTH TO SOUTH, TEMPORARILY 9 OVER FAR SOUTHEASTERN AT
FIRST.
VIOLENT GUSTS.
SEA: ROUGH TO HIGH FROM NORTH TO SOUTH, LOCALLY VERY HIGH OVER FAR
SOUTHERN AT FIRST. SOUTHWEST SWELL 3 TO 5 METERS, TEMPORARILY 6 TO 8
METERS OVER FAR SOUTHERN.
VISI: POOR IN PRECIPITATIONS.
KER (40S/50S, 65E/80E)
RAIN AND FRONTAL SHOWERS OVER EASTERN, THEN SCATTERED SHOWERS.
WIND:NORTHERN HALF: WESTERLY 5 TO 8 FROM NORTH TO SOUTH.
GUSTS.SOUTHERN HALF: WESTERLY 7 TO 9, BUT 7/8 AT END. VIOLENT
GUSTS.
SEA: VERY ROUGH TO HIGH, TEMPORARILY VERY HIGH OVER SOUTHERN.
CROSS SEAS WITH A SOUTHWEST SWELL 3 TO 5 METERS, TEMPORARILY
INCREASING 6 TO 8 METERS OVER SOUTHERN.
VISI: POOR IN PRECIPITATIONS.=