WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
26th OF SEPTEMBER 2026 AT 16:00 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:
=======
FORECAST VALID FROM 262200 TO 272200 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:
====================
Nil.
SYNOPTIC CHART 12:00Z
=====================
High 1030 hPa 40s01w, High 1028 hPa 32s64e
Low 1008 hPa 46s22e, Low 1012 hPa 37s32e
1. Cold Front: 40s20e 42s23w 43s25w into 45s26e
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 10 to 20.
VIS : Good but moderate in rain in places in the western parts for
the first half of the period.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20 but SW 05 to 10 in the east and north-east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 10 to 20 but N to NW 05 to 15 in the south-west.
VIS : Good but moderate in showers and rain in the southern parts.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 10 to 20, reaching 25 in the south-east but in the
north-east for the first half of the period.
VIS : Good but moderate in showers and rain in places in the
south-eastern parts.
SEA STATE: 3.0m in the south-eastern parts, with W to SW swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Anti-cyclonic 05 to 15 but N to NW 10 to 20 in the western
part, reaching 30 at times.
VIS : Good but moderate in showers and thundershowers in the
western and southern parts.
SEA STATE: 3.0m in the western parts from mid-period, with W to SW
swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : SW 15 to 25 in the south-east, otherwise S to SE 10 to
20 reaching 25 to 30 in the east and north-east but
anticyclonic 05 to 15 in the south.
VIS : Good.
SEA STATE: 3.0 to 4.0m in the eastern parts, with S to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Cyclonic 10 to 20 in the south-central parts, but N to NW 15
to 25 in the central and eastern parts, and S to SW 15 to 25
in the western parts reaching 30 at times.
VIS : Good but moderate in showers and thundershowers in
in the western, southern and central parts.
SEA STATE: 3.0 to 4.0m, reaching 4.5m in the western part from mid-
period, with W to SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : N to NE 15 to 25 but SW 20 to 30 in the south-west.
VIS : Good but moderate to poor in showers and thundershowers in the
south-west but in the north-east at first.
SEA STATE: 3.0 to 4.0m in the southern and eastern parts, with S to SW
swell.
MOZAMBIQUE CHANNEL:
WIND : Variable 05 to 10 but E to NE 05 to 15 in the west.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : S to SE 10 to 20 but E to NE 10 to 20 in the south.
VIS : Good but moderate in showers and rain in places.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Anticyclonic 05 to 15 in the south-east, otherwise cyclonic 15
to 25 in the central and northern parts, reaching 30 in the
north and north-east.
VIS : Good becoming moderate to poor in showers and thundershowers
in the northern and western parts.
SEA STATE: 3.5 to 4.5m, with W to SW swell.
AREA 2:
======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA
ACK (AMSTERDAM-CROZET-KERGUELEN)
26/09/26 AT 1600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE CONTINUING OVER KER.
PART 2: GENERAL SYNOPSIS, 26/09/26 AT 1200UTC
- HIGH 1027 NEAR 32S/63E, SLOWLY MOVING EASTWARD.- WESTERLY DISTURBED
FLOW OVER CRO AND KER, MOVING EASTWARD.- HIGH EXPECTED 1027 OVER
WESTERN CRO AT 00UTC, EXPECTED 1033 OVER WESTERN KER AT END.- WARM
FRONT OVER WESTERN CRO AT END.
PART 3: FORECAST FOR 24 HOURS FROM 26/09/26 AT 1800UTC TO 26/09/27
AT 1800UTC
WAM (30S/40S, 50E/65E)
SCATTERED SHOWERS.WIND : ANTICLOCKWISE 3 OR 4, BECOMING N 4 OR 5 OVER
WESTERN AT END.SEA : ROUGH, LOCALLY VERY ROUGH OVER SOUTHERN. SW
SWELL 3 OR 4 METERS.VISI: POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SCATTERED SHOWERS.WIND : ANTICLOCKWISE 3 OR 4, LOCALLY 5 OVER
SOUTHERN.SEA : ROUGH TO VERY ROUGH FROM NORTH TO SOUTH. SW SWELL 3 OR
4 METERS.VISI : POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
SCATTERED SHOWERS, THEN FRONTAL RAIN AND SHOWERS OVER WESTERN
LATER.WIND : SW 5 OR 6, LOCALLY 7 WITH GUSTS OVER EASTERN AT FIRST,
SOON BECOMING ANTICLOCKWISE 3 TO 5 FROM WEST, THEN NE 5 OR 6 OVER
WESTERN AT END.SEA : VERY ROUGH TO HIGH FROM WEST TO EAST, DECREASING
ROUGH TO VERY ROUGH FROM WEST TO EAST LATER. SW SWELL 4 TO 6 METERS,
ABATING.VISI : POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
SCATTERED SHOWERS.WIND : W 6 OR 7, AT TIMES 8 AT FIRST, DECREASING
ANTICLOCKWISE 3 TO 5 OVER WESTERN AT END. SEVERE GUSTS.SEA : HIGH,
GRADUALLY BECOMING VERY ROUGH FROM WEST. SW SWELL 4 TO 6 METERS.VISI
: POOR IN PRECIPITATION.=