WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
16th 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:
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FORECAST VALID FROM 161000 TO 171000 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. TRADES: S to SE 35 in the east.
2. TRISTAN: N to NE 35 in the south-west.
3. CAPE WEST: SE to S 35 in the north-east.
4. CAPE EAST: N to NW 35 in the south-east until mid-period.
5. MARION FORTIES EAST: Cyclonic 35 in places, but NW to W 35 in the
south-east from mid-period.
SYNOPTIC CHART 06:00Z
=====================
High 1034 hPa 33s03w, High 1038 hPa 34s58e,
Low 996 hPa 44s32e, Low 998 hPa 51s31e, Low 1006 hPa 45s38e,
1. Cold Front: 35s26e 40s34e 43s37e 47s37e into 45s38e.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : S to SE 15 to 25.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 15 to 25 but SW 05 to 15 in the extreme west.
VIS : Good.
SEA STATE: 3.0m in the south, with S to SE swell.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 15 to 25 but N to NW 15 to 25 in the south-west.
VIS : Good but moderate in showers and rain in places in the south-
west.
SEA STATE: 3.0 to 4.0m in the east by the end of the period, with S to SE
swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 20 to 30 reaching 35 in the east.
VIS : Good.
SEA STATE: 3.0 to 4.0m reaching 4.5 to 5.0m, with S to SE swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Anticyclonic 05 to 15 in the east until mid-period, otherwise
N to NE 15 to 25 reaching 30 to 35 in the south-west becoming
NW 20 to 30 in the extreme west from mid-period.
VIS : Good but moderate to poor in showers and rain in the north-
west spreading to the west towards mid-period and to the east
by the end of the period.
SEA STATE: 3.0 to 4.0m, reaching 4.5 to 5.0m in places in the south-west,
with SW swell but NW swell in the west by the end of the
period.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anticyclonic 05 to 15 but SE to S 20 to 30 reaching 35 in the
north-east.
VIS : Good.
SEA STATE: 3.0 to 4.0m except in the central west, reaching 4.5 to 5.0m
in places in the north-east, with S to SW swell but SE swell
in the north-east.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NW 15 to 25 in the east, drifting to the north-east from
mid-period reaching 30 to 35 in the south-east until mid-
period, otherwise S to SE 15 to 25 reaching 30 in places in
the north, becoming Anticyclonic 05 to 15 in the south-west
towards the end of the period.
VIS : Good in the south-west until mid-period, otherwise moderate in
showers and rain.
SEA STATE: 3.0 to 4.0m reaching 4.5 to 5.0m in the south-west at first.
with S to SW swell but SE in the north.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : SW 20 to 30 in the extreme west until mid-period but variable
05 to 10 in the west, otherwise N to NE 15 to 25 reaching 30
in the north-east becoming SE 15 to 25 in the south-east from
mid-period.
VIS : Good but moderate in showers and thundershowers in the south-
west spreading to the south-east by the end of the period.
SEA STATE: 3.5 to 4.5m in the south-west by the end of the period, with S
to SE swell in the north.
MOZAMBIQUE CHANNEL:
WIND : N to NE 10 to 20 but E to SE 10 to 20 in the east, spreading
to the south from mid-period.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : SE 15 to 25, reaching 30 but E to NE 15 to 25 in the south.
VIS : Moderate in showers and rain in places.
SEA STATE: 3.0 to 4.0m subsiding in the south from mid-period, with E to
SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Cyclonic 15 to 25 reaching 30 to 35 places, becoming NW to W
20 to 30 from mid-period reaching 35 in the south-east but
Anticyclonic 05 to 15 in the north.
VIS : Moderate in rain and showers with possible snow-showers in the
south.
SEA STATE: 4.5 to 5.5m, reaching 6.0 to 6.5m in the south, with W to SW
swell.
AREA 2:
======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
2026/09/16 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE CONTINUING OVER EASTERN KER.
PART 2: GENERAL SYNOPSIS, 26/09/16 AT 0000UTC
- FRESH OR STRONG DISTURBED WESTERLY FLOW OVER SOUTHERN PART OF BASIN WITH LOW DEEPENING 1002 JUST SOUTHWEST OF CROZET ISLAND THE 16 AT 18 UTC, EXPECTED NEAR 49S/59E THE 17 AT 06 UTC.- SQUALLY WEATHER AT FIRST OVER EAST OF AMS.- HIGH 1038 OVER WAM AND AMS.
PART 3: FORECAST FOR 24 HOURS FROM 26/09/16 AT 0600UTC TO 26/09/17 AT 0600UTC
WAM (30S/40S, 50E/65E)
SCATTERED SHOWERS IN NORTH LATER. FRONTAL RAIN OR SHOWERS IN FAR SOUTHWEST AT END.
WIND: ANTICLOCKWISE 3 TO 5, BUT LOCALLY NORTHWEST 6 OR 7, TEMPORARILY 8,
IN FAR SOUTH WITH SEVERE GUSTS.
SEA : MODERATE OR ROUGH, LOCALLY VERY ROUGH IN SW SWELL IN EAST AT FIRST,
THEN VERY ROUGH RAPIDLY IN FAR SOUTH.
VIS : GOOD, BECOMING POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SCATTERED SHOWERS AT FIRST IN EAST.
WIND: SOUTH OR SOUTHWEST 5 OR 6, LOCALLY 7 WITH GUSTS AT FIRST IN FAR
EAST, DECREASING ANTICLOCKWISE 3 TO 5 FROM WEST.
SEA : VERY ROUGH OR HIGH IN LONG SSW SWELL, DECREASING ROUGH OR VERY
ROUGH FROM WEST.
VIS : GOOD, BUT LOCALLY MODERATE IN SHOWERS AT FIRST IN EAST.
CRO (40S/50S, 50E/65E)
FRONTAL RAIN OR SHOWERS. SNOW SHOWERS AT END IN FAR SOUTHWEST.
WIND: NORTHWEST 6 OR 7, AT TIMES 8, INCREASING CLOCKWISE 8 OR 9 AT END IN
FAR SOUTH. SEVERE GUSTS.
SEA : ROUGH OR VERY ROUGH, BECOMING VERY ROUGH OR HIGH IN SOUTH AT END. W
SWELL 4 OR 5 M IN SOUTH.
VIS : POOR OR VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
FRONTAL RAIN OR SHOWERS.
WIND: WESTERLY 6 OR 7, AT TIMES 8. SEVERE GUSTS.
SEA : ROUGH OR VERY ROUGH, BUT LOCALLY HIGH IN NORTHEAST TILL 16 AT 15
UTC. W SWELL INCREASING 4 OR 5 M IN SOUTH.
VIS : POOR OR VERY POOR IN PRECIPITATION.