WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
23RD OF JUNE 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:
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FORECAST VALID FROM 232200 TO 242200 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. ST HELENA: SE to S 35 in the extreme south-east.
2. CAPE EAST: NW to W 35 in the west at times until mid-period.
3. MARION FORTIES EAST : N to NW 35 in the south-west drifting to the south-
east by mid-period.
SYNOPTIC CHART 12:00Z
=====================
High 1029 39s15w, High 10232 hPa 34s52e
1. Cold Front: 31s03ew 38s15e 48s23e 56s28e into 62s25e
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : SE 10 to 20, reaching 25 at times in the west from mid-period.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 05 to 15, but S to SW 05 to 15 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : SE to S 15 to 25 reaching 30 to 35 in the extreme south-east.
VIS : Good, but moderate to poor in showers and thundershowers in
the south-east until mid-period.
SEA STATE: 3.0 to 4.0m in the south spreading to the north by the end of the
period, reaching 4.5 to 5.5m in the south-east, with S to SW
swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 05 to 15, reaching 20 at times in the south. It will
become cyclonic 25 to 35 in the extreme south-west towards mid-
period.
VIS : Good, but moderate to poor in showers and thundershowers in
the south-west reaching very poor at times.
SEA STATE: 3.5 to 4.5m in the south, spreading to the central parts towards
mid-period, with S to SW swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Anti-cyclonic 05 to 15, but SE 20 to 25 in the extreme north-east.
It will become N 15 to 25 in the west from early morning, reaching
30 in the south-west.
VIS : Good, but moderate in showers and rain in the south-west from mid-
period.
SEA STATE: 3.0 to 4.0m, reaching 4.5m in the extreme east, with S to SW swell
but NW in the extreme south-west. It will subside in the north-
west.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anti-cyclonic 05 to 15 becoming S to SE 15 to 25 in the northern
half from mid-period, reaching 30 in the extreme north-west.
VIS : Good, but moderate in showers and rain in the extreme north-west.
SEA STATE: 3.5 to 4.5m, reaching 5.0 to 7.0m in places over the southern
half, with SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to SW 10 to 20 in the west becoming anti-cyclonic 05 to 15 from
mid-period spreading over the central parts by the end of the
period, otherwise N to NW 10 to 20 reaching 25 at times over the
central south drifting to the south-east by mid-period.
VIS : Moderate in showers and thundershowers, becoming good in the west
from mid-period.
SEA STATE: 3.0 to 4.0m (except in the north-east from mid-period), with W to
NW swell, but 3.5 to 4.5m in the west reaching 5.0 to 7.0m in the
west, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : N to NE 10 to 20 in the east, otherwise variable 05 to 10.
VIS : Good, but moderate in showers and thundershowers in places over
the central parts.
SEA STATE: 3.0 to 3.5m in the east, with S swell.
MOZAMBIQUE CHANNEL:
WIND : Variable 05 to 10 in the south and central parts, otherwise S to
SE 05 to 15 spreading to the central and southeastern parts by
the end of the period.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : Variable 05 to 10 in the extreme south-west, otherwise E to SE 15
to 25.
VIS : Moderate in showers and rain in places.
SEA STATE: 3.0m, with S to SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to NW 15 to 25 reaching 30 at times, but SW 15 to 25 in the
extreme north-west from mid-period.
VIS : Good, but moderate in showers and thundershowers in places and
clearing from the west.
SEA STATE: 3.0 to 4.0m, with W to NW swell but 4.0 to 5.0m with SW swell in
the extreme south-west and north-west.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA
ACK (AMSTERDAM-CROZET-KERGUELEN)
26/06/23 AT 1600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
NIL.
PART 2: GENERAL SYNOPSIS, 26/06/23 AT 1200UTC
- HIGH 1031 NEAR 35S/54E AND HIGH 1031 NEAR 43S/60E, MERGING TO FORM
A SINGLE HIGH, EXPECTED 1038 NEAR 42S/67E THE 24/06 AT 06UTC.
- COLD FRONT OVER SOUTH-WESTERN CRO AT END.
PART 3: FORECAST FOR 24 HOURS FROM 26/06/23 AT 1800UTC TO 26/06/24
AT 1800UTC
WAM (30S/40S, 50E/65E)
FEW SHOWERS.
WIND: ANTICLOCKWISE 3/4 AT TIMES 5, INCREASING NW 5/6 WITH GUSTS OVER
FAR SOUTH-WESTERN AT END.
SEA: ROUGH TO VERY ROUGH BY SOUTH-WESTERLY SWELL 3 TO 5M ABATING.
VISIBILITY: MAINLY GOOD.
AMS (30S/40S, 65E/80E)
FEW SHOWERS.
WIND: S 4 TO 6 FROM WEST TO EAST, BECOMING GRADUALLY ANTICLOCKWISE
3/4 AT TIMES 5, BUT SE 5/6 OVER NORTH-EASTERN. GUSTS.
SEA: ROUGH TO VERY ROUGH BY SOUTH-WESTERLY SWELL 3 TO 5 M.
VISIBILITY : MAINLY GOOD.
CRO (40S/50S, 50E/65E)
SCATTERED SHOWERS. FRONTAL RAIN AND SHOWERS OVER SOUTH-WESTERN AT
END.
WIND: ANTICLOCKWISE 3/4 AT TIMES 5, INCREASING GRADUALLY NW 5/6 AT
TIMES 7 FROM SOUTH-WEST. GUSTS.
SEA : ROUGH TO VERY ROUGH BY SOUTH-WESTERLY SWELL 3 TO 5M ABATING.
VISIBILITY : POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
FEW SHOWERS.
WIND: ANTICLOCKWISE 3/4 OVER NORTHERN AT TIMES 5 AND W 5/6 OVER
SOUTHERN, BUT SW 6/7 OVER EASTERN AT FIRST. GUSTS.
SEA: VERY ROUGH TO HIGH FROM WEST TO EAST BECOMING ROUGH TO VERY
ROUGH LATER, BY SW SWELL 4 TO 6 M ABATING.
VISIBILITY : MAINLY GOOD.=