WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
15th 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 152200 TO 162200 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 north-eastern and central parts.
2. CAPE EAST: W to NW 35 in the western parts at first and south-eastern
Parts until the end of the period.
3. MARION FORTIES EAST: N to NW 35 over north-east. It will become W to
SW 35 over the central parts towards the end of
the period.
SYNOPTIC CHART 12:00Z
=====================
High 1029 hPa 33s14w, High 1038 hPa 36s52e
Low 964 hPa 64s53e, Low 995 hPa 48s16e, Low 1011 hPa 30s33e
1. Cold Front: 40s10e 43s14e 46s16e into 48s16e
2. Cold Front: 30s10e 32s11e 37s18e 43s27e 50s34e 57s46e 62s58e
into 64s53e
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.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : N to NE 15 to 25 in the south-west otherwise E to SE 15 to 25
in the south and south-east.
VIS : Good but moderate in showers and rain in places in the central
and south-west.
SEA STATE: 3.0m in places over the central at first, with S to SW
swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 15 to 25, reaching 30 to 35 in the central and north-
eastern parts.
VIS : Good.
SEA STATE: 3.0 to 4.0m in the south-western parts, spreading to the
central towards mid-period, with S to SW swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Anticyclonic 05 to 15 in the central and eastern parts but N
to NW 15 to 25 in the south-west, spreading over the west
towards mid-period. It will become E to NE 15 to 25 in the
north-west by the end of the period.
VIS : Good becoming moderate in showers and rain in the western
Parts from mid-period.
SEA STATE: 3.0 to 4.0m except in the northern parts, reaching 4.5m
in the extreme south-west, with W to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : W to SW 15 to 25 in the south-east at first, otherwise S to SE
15 to 25, reaching 30 in places in the central and north-east
towards the end of the period. It will become anticyclonic 05
to 15 in the west towards mid-period, spreading to the central
towards the end of the period.
VIS : Moderate to poor in showers and rain eastern parts at first,
otherwise good.
SEA STATE: 3.0 to 4.0m, reaching 4.5 to 5.0m in places in the southern
parts until mid-period, with W to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to NW 15 to 25, reaching 30 to 35 in the western parts
at first and south-eastern parts, but SW 15 to 25 over the
western parts aa first drifting to the central parts towards
mid-period, otherwise S to SE 15 to 25.
VIS : Moderate in showers and rain over the west and the
central parts but clearing over the south-west parts from mid-
period, otherwise good.
SEA STATE: 3.0 to 4.0m, reaching 4.5 to 5.5m in places in the west and
south-central, with W to NW swell in the west but N to NE
central parts.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Cyclonic 05 to 15 in the north-western parts at first becoming
W to SW 15 to 25 over the south-west spreading to the north-
western parts towards mid-period, otherwise E to NE 15 to 25,
reaching 30 in the northern parts (south of Madagascar) at
first. It will become S to SE 15 to 25 in the south-west
towards the of the period.
VIS : Good becoming moderate to poor in showers and rain in the
south-west towards the end of the period.
SEA STATE: 3.0 to 4.0m except in the north-western and south-eastern
parts, with E to NE swell over the central, but S to SW in the
south-west.
MOZAMBIQUE CHANNEL:
WIND : N to NE 10 to 15 but E to SE 15 to 25 in the north and eastern
parts towards the end of the period.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : SE 15 to 25, reaching 30 in the north-west at times, but E to
NE 15 to 25 in the south.
VIS : Moderate in showers and rain in west and north places.
SEA STATE: 3.0 to 4.0m, reaching 4.5m in the northern parts, with E to SE
swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : N to NW winds of 15 to 25 over the central and eastern parts
until mid-period, reaching to 30 to 35 in the northeast,
becoming cyclonic at 15 to 25 over the central parts, shifting
towards the extreme east by the end of the period. It will
become W to SW at 15 to 25 in the west from mid-period,
spreading to the central and south-eastern parts towards the
end of the period, while reaching 30 to 35 over the
central parts towards the end of the period.
VIS : Moderate to poor in showers and rain over the north across the
central to the south-east, spreading to the north-east towards
the end of the period, otherwise good.
SEA STATE: 4.0 to 5.0m, reaching 5.5 to 6.5m in the central and eastern
parts, with W to NW swell.
AREA 2:
======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/09/15 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 EASTERN KER.
PART 2: GENERAL SYNOPSIS, 26/09/15 AT 1200UTC
- HIGH 1035 NEAR 35S/53E, SLOWLY MOVING EASTWARD. - COLD FRONT
EXPECTED OVER SOUTHWEST CRO AT FIRST.
PART 3: FORECAST FOR 24 HOURS FROM 26/09/15 AT 1800UTC TO 26/09/16
AT 1800UTC
WAM (30S/40S, 50E/65E)
SCATTERED SHOWERS.
WIND: ANTICLOCKWISE 3 TO 5, BUT NW 5 OR 6 OVER FAR
SOUTH-WESTERN.
SEA : ROUGH TO VERY ROUGH BECOMING MODERATE TO ROUGH
LATER. SW SWELL 3 TO 5 METERS ABATING 2 TO 3 METERS AT END.
VISI : GOOD.
AMS (30S/40S, 65E/80E)
SCATTERED SHOWERS.
WIND : SW 6 OR 7, DECREASING ANTICLOCKWISE 3 TO 5
FROM WEST SOON. GUSTS.
SEA : VERY ROUGH OR HIGH BECOMING ROUGH TO VERY
ROUGH LATER. LONG SW SWELL 4 TO 6 METERS ABATING 3 TO 5 METERS AT
END.
VISI : GOOD.
CRO (40S/50S, 50E/65E)
RAIN AND FRONTAL SHOWERS (CF) OVER SOUTHERN.
WIND : NW 6 OR 7 BECOMING ANTICLOCKWISE 3 TO 5 OVER SOUTHERN AT END. GUSTS.
SEA : ROUGH OR VERY ROUGH. LONG SW SWELL 4 TO 6 METERS ABATING 2 TO 4 METERS AT END.
VISI: POOR OR VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
RAIN AND FRONTAL SHOWERS (CF) OVER SOUTHERN SOON.
WIND : SW 6 OR 7, AT TIMES 8 OVER FAR EASTERN AT FIRST, BUT SW 5 OR 6
OVER WESTERN, INCREASING QUICKLY W 6 OR 7 BY WESTERN. SEVERE GUSTS.
SEA : VERY ROUGH TO HIGH, BECOMING ROUGH OR VERY ROUGH AT END. LONG W SWELL 4 OR 5 METERS, ABATING 3 OR 4 METERS LATER THEN NEW W SWELL 3 TO 5 METERS OVER FAR SOUTHWESTERN AT END.
VISI : POOR OR VERY POOR IN PRECIPITATION. =