WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
21ST OF SEPTEMBER 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:
=======
FORECAST VALID FROM 211000 TO 221000 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: CYCLONIC 35 TO 40 IN THE CENTRAL PARTS, WHILE MOVING
EASTWARDS FROM MID-PERIOD.
2. MARION FORTIES EAST: NW 35 IN THE EXTREME SOUTH-WEST FROM
MID-PERIOD.
SYNOPTIC CHART 06:00Z
=====================
HIGH 1029 HPA 33S24E, HIGH 1029 HPA 31S59E
LOW 1008 HPA 43S00W, LOW 1020 37S35E
1. COLD FRONT: 29S08W 35S03W 39S01W INTO 43S00W.
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.
VIS : GOOD.
ST HELENA (15S/30S, 00E/20W):
WIND : E TO SE 05 TO 15.
VIS : GOOD.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S TO SE 10 TO 20, BUT SW TO W 05 TO 15 IN THE EXTREME
EAST.
VIS : GOOD.
TRISTAN (30S/40S, 00E/20W):
WIND : NW 20 TO 30 IN THE NORTH-EAST AT FIRST, OTHERWISE W TO SW
15
TO 25, AND ANTICYCLONIC 05 TO 15 IN THE WEST, WHILE
SPREADING
EASTWARDS IT WILL BECOME ANTICYCLONIC 05 TO 15 IN THE
CENTRAL
PARTS AND SE 15 IN THE NORTH-EAST AND NW 15 TO 25 IN THE
SOUTH-WEST BY END OF PERIOD.
VIS : GOOD.
SEA STATE: 3.0 M IN THE CENTRAL PARTS UNTIL MID-PERIOD, WITH W TO SW
SWELL.
CAPE WEST (30S/40S, 00E/20E):
WIND : E TO SE 15 TO 25 BUT W TO NW 05 TO 15 IN THE WEST, BUT SW
05 TO 15 IN THE SOUTH-WEST.
VIS : GOOD, BUT MODERATE IN SHOWERS AND RAIN IN THE EXTREME WEST
AT
FIRST.
SEA STATE: 3.0 M IN THE SOUTH-WEST AT FIRST, WITH NW SWELL.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : ANTICYCLONIC 15 TO 25 IN THE EAST, OTHERWISE SE 05
TO 10, BUT CYCLONIC 20 TO 30 IN THE CENTRAL PARTS, WHILE
MOVING EASTWARDS, IT WILL REACH 35 TO 40 FROM MID-PERIOD.
VIS : GOOD BECOMING MODERATE TO POOR IN PLACES IN THE CENTRAL
AND
SOUTHERN PARTS, SPREADING TO THE EAST FROM MID-PERIOD.
SEA STATE: 3.0 TO 4.0M IN THE CENTRAL AND SOUTHERN PARTS, REACHING
5.0M
IN THE EAST FROM MID-PERIOD, WITH SW SWELL, BUT CYCLONIC
IN
THE EASTERN PARTS.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : E TO NE 15 TO 25, BUT SE 05 TO 15 IN THE CENTRAL-NORTH
AND SW 05 TO 15 IN THE SOUTH-WEST WHERE IT WILL BECOME SE
TO E
05 TO 15 TOWARDS END OF PERIOD.
VIS : GOOD BUT MODERATE TO POOR IN SHOWERS AND RAIN IN THE EAST.
SEA STATE: 3.0M IN THE CENTRAL PARTS UNTIL MID-PERIOD, WITH S TO SE
SWELL.
MOZAMBIQUE CHANNEL:
WIND : S TO SE 15 TO 25 BUT W TO SW 05 TO 15 IN THE EAST.
VIS : GOOD.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : N TO NE 05 TO 15 IN THE SOUTH, OTHERWISE E TO SE 15 TO 25.
VIS : GOOD.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : SW 15 TO 25, REACHING 30 IN THE SOUTH-EAST AT FIRST, BUT
SE 10
TO 20 IN THE NORTH AND NW 15 TO 25 IN THE SOUTH-WEST WHERE
IT
WILL REACH 30 TO 35 IN THE EXTREME SOUTH-WEST FROM
MID-PERIOD.
VIS : GOOD BUT MODERATE IN SHOWERS AND RAIN IN THE NORTH AT
FIRST,
BUT IN SNOW-SHOWERS OVER THE SOUTH.
SEA STATE: 3.0 TO 4.0M REACHING 5.0 TO 6.0M IN THE IN THE CENTRAL
PARTS
AND SOUTHERN PARTS, BUT 7.0 TO 9.0M IN THE SOUTH-EAST
UNTIL
MID-PERIOD, WITH W TO SW SWELL.
AREA 2:
======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA
ACK (AMSTERDAM-CROZET-KERGUELEN)
26/09/21 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE OR STRONG GALE CONTINUING OVER CRO.
- GALE EXPECTED SOON OVER KER.
PART 2: GENERAL SYNOPSIS, 26/09/21 AT 0000UTC
- DISTURBED FRESH OR STRONG WESTERLY FLOW OVER SOUTHERN PART OF
BASIN.
- COLD FRONT AXIS 40S/61S 40S/55E, MOVING EASTWARD.
- HIGH 1029 OVER NORTHERN WAM AND AMS.
- HIGH EXPECTED 1032 OVER WESTERN CRO AT END.
PART 3: FORECAST FOR 24 HOURS FROM 26/09/21 AT 0600UTC TO 26/09/22 AT
0600UTC
WAM (30S/40S, 50E/65E)
RAIN OVER FAR SOUTHERN SOON.
WIND : ANTICLOCKWISE 3 TO 5, BUT W 5 OR 6 OVER FAR SOUTHERN AT FIRST.
SEA : MODERATE TO VERY ROUGH FROM NORTH TO SOUTH. SW SWELL OVER
SOUTHERN, 2 OR 3 METERS, INCREASING 4 OR 5 METERS AT END.
VISI : POOR WITH PRECIPITATION OVER FAR SOUTHERN.
AMS (30S/40S, 65E/80E)
FEW SHOWERS, THEN FRONTAL SHOWERS AND RAIN OVER SOUTHERN AT END.
WIND : ANTICLOCKWISE 3 TO 5 BUT W 5 OR 6 OVER FAR SOUTHERN.
SEA : MODERATE TO VERY ROUGH FROM NORTH TO SOUTH. SW SWELL 2 TO 4
METERS
OVER SOUTHERN.
VISI : GOOD, THEN POOR WITH PRECIPITATION OVER FAR SOUTHERN.
CRO (40S/50S, 50E/65E)
FRONTAL RAIN AND SHOWERS OVER FAR NORTHERN AT FIRST, ELSEWHERE
SCATTERED SHOWERS, LOCALLY SNOWY OVER FAR SOUTHERN.
WIND : W OR SW 6 OR 7 OVER NORTHERN, 8 OR 9 OVER SOUTHERN, DECREASING
5
OR 6 FROM WEST LATER, THEN BECOMING ANTICLOCKWISE 3 TO 5 OVER
NORTHERN AT END. SEVERE GUSTS.
SEA : VERY ROUGH TO VERY HIGH FROM NORTH TO SOUTH. SW SWELL 2 TO 4
METERS SOON INCREASING 7 TO 9 METERS.
VISI : POOR TO VERY POOR WITH PRECIPITATION.
KER (40S/50S, 65E/80E)
RAIN OVER NORTHERN. SNOW SHOWERS OVER SOUTHERN.
WIND : W 6 OR 7, SOON INCREASING 7 OR 8, DECREASING SW 5 OR 6 OVER
NORTHWESTERN AT END. SEVERE GUSTS.
SEA : VERY ROUGH SOON BECOMING HIGH TO VERY HIGH FROM SOUTHWEST. W
TO SW
SWELL 3 TO 5 METERS, INCREASING 7 OR 8 METERS AT END.
VISI : POOR TO VERY POOR WITH PRECIPITATION.
WE RESPECT YOUR PRIVACY AND ACKNOWLEDGE THAT THIS EMAIL MAY CONTAIN
PERSONALLY IDENTIFIABLE INFORMATION. THE EMAIL MAY BELONG TO YOU,
OTHERS, AND OR TO YOUR ORGANIZATION, AND WHICH WE WILL PROCESS, WHICH
PROCESSING WILL BE DONE IN ACCORDANCE WITH OUR PRIVACY NOTICE ON OUR
WEBSITE - HTTPS://WWW.WEATHERSA.CO.ZA/HOME/PRIVACYNOTICE=