WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
29TH OF JUNE 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 291000 TO 301000 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. TRISTAN: Cyclonic 35 to 40 in the west, drifting to the central and
eastern part from mid-period.
2. CAPE EAST: N to NW 35 in the south-east.
3. MARION FORTIES EAST: N to NW 35 in the east, drifting to the extreme
north-east from mid-period, but W to SW 35 in
the south-west, spreading to the south-east by mid-
period
SYNOPTIC CHART 06:00Z
=====================
High 1030 hPa 32s08w, High 1041 hPa 40s70e
Low 1009 hPa 40s14w, Low 992 hPa 50s37e.
1. Cold Front: 33s27e 39s35e 45s42e 53s44e into 50s37e.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : SE 15 to 25.
VIS : Good, but moderate in showers and rain in places.
SEA STATE: 3.0m in the west, with SE swell.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20, but SW 05 to 15 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : Variable 05 to 10 in the south, becoming SW 15 to 25 in the
extreme south from mid-period, otherwise S to SE 15 to 25.
VIS : Good, but moderate in showers and rain in places in the north and
in the south-west by the end of the period.
SEA STATE: 3.0m, with S to SE swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 15 to 25, but variable 05 to 10 in the south-west towards
mid-period.
VIS : Good.
SEA STATE: 3.0 to 4.0m in the south, with SW swell, but SE swell in the
north.
TRISTAN (30S/40S, 00E/20W):
WIND : Cyclonic 20 to 30 in the west reaching 35 to 40, drifting to the
central and eastern part from mid-period, otherwise Anticyclonic
05 to 15, becoming NW 15 to 25 in the extreme south-west by the
end of the period.
VIS : Good, but moderate in showers and rain in the east and central
part.
SEA STATE: 3.0 to 4.0, reaching 5.0 to 6.0m in the south-west, drifting to
the central and eastern part from mid-period, with S to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anticyclonic 05 to 15, but SE 10 to 20 in the extreme north-east.
VIS : Good, but moderate in showers in places, clearing in the north by
mid-period.
SEA STATE: 4.0 to 5.0m in the east until mid-period, otherwise 3.0 to 3.5m,
with SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NW 15 to 25 reaching 30 to 35 in the south-east, otherwise SW
to W 15 to 25 reaching 30 in places, becoming Anticyclonic 05 to
15 in the west by mid-period, spreading to the central part by the
end of the period.
VIS : Good, but moderate in showers and rain in the west and central
part, spreading to the east from mid-period.
SEA STATE: 3.0 to 4.0m in the east until mid-period, otherwise 4.5 to 5.5m,
with SW swell, but NW swell in the east.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : SW to S 15 to 25 in the extreme west, drifting to the extreme
north-west from mid-period, otherwise E to NE 10 to 20 reaching 25
to 30 in places, becoming variable 05 to 10 in places in the
north-west and central part from mid-period.
VIS : Good, but moderate in showers and rain in places in the west.
SEA STATE: 3.0 to 3.5m, reaching 4.0 to 4.5m in the south-west until mid-
period, with SE swell, but SW swell in the south-west.
MOZAMBIQUE CHANNEL:
WIND : Variable 05 to 10, becoming SE to S 10 to 20 from mid-period.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 10 to 20 reaching 25 to 30 in the north-east.
VIS : Moderate in showers and rain in places, clearing in the east by
the end of the period.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : N to NW 25 to 35 in the east, drifting to the extreme north-east
from mid-period, otherwise W to SW 15 to 25 reaching 30 to 35 in
the south-west, spreading to the south-east by mid-period.
VIS : Moderate in showers and rain in places and snow-showers in the
south, clearing in the west from mid-period.
SEA STATE: 3.5 to 4.5m reaching 5.0 to 6.0m in places, with W to NW swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/06/29 AT 0600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
GALE EXPECTED OVER CRO.
PART 2: GENERAL SYNOPSIS, 26/06/29 AT 0000UTC
- FRESH TO STRONG NORTHWESTERLY DISTURBED FLOW OVER CRO, WITH
ARRIVIAL OF COLD FRONT.
- SQUALLY AREA IN FAR NORTH OF AMS WITH ASSOCIATED FRESH FLOW.
- HIGH1042 HPA NEAR 40S/70E, EXPECTED 1040 HPA NEAR 37S/77E AT END.
PART 3: FORECAST FOR 24 HOURS FROM 26/06/29 AT 0600UTC TO 26/06/30 AT
0600UTC
WAM (30S/40S, 50E/65E)
SCATTERED SHOWERS.
WIND:
WEST HALF: NORTHERLY TO NORTH-EASTERLY 4 TO 6 FROM NORTH TO SOUTH,
REACHING 7 IN THE SOUTH-WEST AT END.
EAST HALF: EASTERLY TO NORTH-EASTERLY 4/5, REACHING 6/7 IN THE
NORTH-EAST.
SEA: MODERATE TO ROUGH, LOCALLY VERY ROUGH IN THE FAR NORTH-EAST AND
SOUTH-WEST. EASTERLY SWELL, 2 TO 4 METERS IN NORTH.
VIS: POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SCATTERED SHOWERS, BUT SQUALLS IN FAR NORTH.
WIND: EASTERLY 6/7 IN THE NORTH AND ANTICLOCKWISE 3 TO 5 IN THE
SOUTH.
SEA: ROUGH TO VERY ROUGH, CROSSED IN THE NORTH, BECOMING MODERATE IN
THE SOUTH. SOUTH-WESTERLY SWELL OF 2 TO 4 METERS ABATING.
VISI: POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
LOCALLY THUNDERY SHOWERS AND FRONTAL RAIN IN THE SOUTH-WEST.
SCATTERED SHOWERS ELSEWHERE.
WIND: NORTH-WESTERLY 7 TO 8 WITH VIOLENT GUSTS AHEAD OF THE FRONT,
BACKING WESTERLY 6/7 BEHIND AT THE END OVER SOUTH-WEST. BUT
NORTH-WESTERLY 5/6 IN THE NORTHERN AREAS AT START.
SEA: ROUGH TO VERY ROUGH, BECOMING LOCALLY HIGH IN THE SOUTH.
SOUTH-WESTERLY SWELL 3 METERS AHEAD THE FRONT AND LATER
NORTH-WESTERLY SWELL 3 TO 5 METERS WITH THE FRONT OVER SOUTH WEST.
VIS: VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
SCATTERED SHOWERS.
WIND: WESTERLY TO NORTH-WESTERLY, 4 TO 7 FROM NORTH TO SOUTH, BUT
VARIABLE 2/3 IN THE FAR NORTH OF THE AREA INITIALLY.
SEA: MODERATE TO ROUGH IN THE NORTH, BUT ROUGH TO VERY ROUGH IN THE
SOUTH. SOUTH-WESTERLY SWELL, 2 TO 4 METRES.
VIS: POOR IN PRECIPITATION