WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
25th OF SEPTEMBER 2026 AT 17:00 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:
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FORECAST VALID FROM 252200 TO 262200 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. MARION FORTIES EAST: W to SW 35 in the south-eastern parts at first.
SYNOPTIC CHART 12:00Z
=====================
High 1028 hPa 38s18w, High 1028 hPa 30s08w, 1023 hPa 35s49e
Low 1003 hPa 51s05e ,Low 1013 hPa 36s24e
1. Cold Front: 32s21w 34s15w 38s01w 42s04e 47s08e into 51s05e
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 10 to 20.
VIS : Good but moderate in light rain in the south-west.
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 : Variable 05 to 10 in the south-central, otherwise E to SE 10
to 20 but N to NE 05 to 15 in the south-west.
VIS : Good.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 10 to 20, reaching 25 to 30 in the north-east.
VIS : Good but moderate to poor in showers and thundershowers in
the south-east at first.
TRISTAN (30S/40S, 00E/20W):
WIND : Anti-cyclonic 05 to 15 becoming N to NW 05 to 15 in the west
towards mid-period.
VIS : Good but moderate in showers and rain in the west and central.
SEA STATE: 3.0 to 3.5m in the south-eastern parts until, with W to SW
swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : W to SW 15 to 25 in the south-west at first, otherwise S to SE
10 to 20 reaching 25 in the north-west the southern and
central parts by 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 thundershowers in places in
the east for the first-half of the period and central from
mid-period.
SEA STATE: 3.0 to 3.5m in the southern and central parts spreading to
the east from mid-period, with S to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Cyclonic 05 to 15 in the west at first drifting to the south-
central by mid-period but N to NW 15 to 25 in the central
spreading to the east towards the end period. it will become S
to SE 15 to 25 in the west by the end of the period.
VIS : Good but moderate in showers and thundershowers in
in the west and central, spreading to the south-east towards
the end of the period.
SEA STATE: 3.0 to 4.0m except in the northern parts, with W to SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Anti-cyclonic 05 to 15 east until mid-period, otherwise N to
NE 15 to 25.
VIS : Good but moderate to poor in showers and thundershowers in the
south-west.
SEA STATE: 3.0m in the south and northern parts (near Madagascar) from
mid-period, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : Variable 05 to 10 becoming E to NE 05 to 15 towards the end of
the period.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : S to SE 05 to 15 but E to NE 05 to 15 in the south.
VIS : Good but moderate in showers and rain in places in
central and west.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to SW 15 to 25 in the central and eastern parts until mid-
period, reaching 30 to 35 in the south-eastern parts at first
becoming anticyclonic 05 to 15 in the west from mid-period,
spreading to the east towards the end of the period.
VIS : Good becoming moderate in showers and thundershowers in the
northern parts towards mid-period.
SEA STATE: 3.5 to 4.5m reaching 5.5 to 6.5m in the in the south-eastern
parts until mid-period, 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)
26/09/25 AT 1600UTC
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 KER.- STRONG GALE FORCE 9 OVER CRO.
PART 2: GENERAL SYNOPSIS, 26/09/25 AT 1200UTC
- LOW 1005 HPA NEAR 40S/73E, MOVING EASTWARD. WAVING FRONT AXIS
24S/62E, 26S/64E, 31S/70E, 39S/73E._ HIGH 1022 HPA NEAR 31S/49E,
MOVING EASTWARD.- SLIGHT COLD FRONT OVER SOUTHERN CRO AND KER, MOVING
RATHER RAPIDLY EASTWARD.
PART 3: FORECAST FOR 24 HOURS FROM 26/09/25 AT 1800UTC TO 26/09/26
AT 1800UTC
WAM (30S/40S, 50E/65E)
SCATTERED SHOWERS.WIND: ANTICLOCKWISE 3/4 BUT INCREASING W 5/6 WITH
GUSTS OVER SOUTHERN AREA.SEA:BECOMING ROUGH TO VERY ROUGH. SW SWELL 3
TO 5 METERS.VISI: POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
FRONTAL RAIN, SHOWERS AND SQUALLS AT BEGINNING THEN SCATTERED SHOWERS
BEHIND FRONT.WIND: CLOCKWISE 5/6 OVER EASTERN AREA AT BEGINNING
BECOMING W TO SW 3/4 AT TIMES 5 BY WESTERN AREA.SEA: MODERATE TO
ROUGH BECOMING ROUGH TO VERY ROUGH. SW SWELL INCREASING 3 TO 5
METERS.VISI: POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
FRONTAL RAIN AND SHOWERS OVER SOUTHERN AREA. SCATTERED SHOWERS OVER
NORTHERN AREA.WIND: WESTERLY 7 TO 8 TEMPORARILY 9. SEVERE GUSTS. SEA:
VERY ROUGH TO HIGH. SW SWELL 5 TO 6 METERS.VISI: POOR TO VERY POOR IN
PRECIPITATION.
KER (40S/50S, 65E/80E)
FRONTAL RAIN ,SHOWERS AND SQUALLS DRIFTING AWAY GRADUALLY BY
EASTWARD, THEN FRONTAL RAIN AND SHOWERS OVER SOUTHERN AREA.WIND:
BECOMING GRADUALLY W TO NW 6/7 AT TIMES 8. SEVERE GUSTS.SEA: VERY
ROUGH TO HIGH. SW SWELL 4 TO 6 METERS.VISI: POOR OR VERY POOR IN
PRECIPITATION.=