WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
30TH OF MAY 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 302200 TO 312200 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 WEST: NW to N 35 in the south-west spreading to the south-
east from mid-period.
SYNOPTIC CHART 12:00Z
=====================
High 1024 hPa 33s11e, High 1032 hPa 44s55e
Low 998 hPa 37s11w, Low 1020 hPa 33s45e, Low 958 hPa 59s37e
1. Cold front: 23s20w 30s12w 35s08w into 37s11w.
2. Cold front: 45s30e 50s35e 55s40e into 59s37e.
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 10 to 20.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20, but SW 05 to 10 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : N to NW 15 to 25 in the south-east, but SW to W 05 to 15 in
the south-west until mid-period otherwise SE to E 05 to 15.
VIS : Good, but moderate in showers and rain in the south-east.
SEA STATE: 3.0 to 3.5m in the south-west, with SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 05 to 15, but N to NW 05 to 15 in the south-west.
VIS : Good.
TRISTAN (30S/40S, 00E/20W) :
WIND : NW 20 to 30 in the east at first, otherwise S to SW 15 to 25,
reaching 30 in the central and eastern parts in the first half
of the period, becoming SE 10 to 20 in the north towards the
end of the period.
VIS : Good, but moderate in showers and thundershowers in the north
and east until mid-period.
SEA STATE: 3.0 to 4.0m reaching 5.0m in the south-east until mid-
period, with NW to W swell, but SW to S in the south-west
spreading to the north and east from mid-period.
CAPE WEST (30S/40S, 00E/20E):
WIND : SE 05 to 15 in the north-east, otherwise NW to N 15 to 25
reaching 30 to 35 in the south-west spreading to the south-
east from mid-period, while becoming SW 15 to 25 in the west.
VIS : Good, but moderate in showers and thundershowers in the
south-west spreading to the north-west from mid-period.
SEA STATE: 3.0 to 4.0m in the south and west reaching 4.5 to 5.0m in the
south-west drifting to the south-east towards by the end of
the period, with W to NW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : NE to N 10 to 20 in the west, otherwise S to SE 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 thundershowers in the east
until mid-period.
SEA STATE: 3.0 to 3.5m in the east until mid-period, with SW to S swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : NE 10 to 20 in the extreme south-east, otherwise S to SE 05 to
15 reaching 20 in the south-east from mid-period.
VIS : Good, but moderate to poor in showers and thundershowers in
the south-east.
SEA STATE: 3.0m in the south until mid-period, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 20.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : Variable 05 to 10 in the south, otherwise E to SE 10 to 20.
VIS : Good, but moderate in showers and rain in places in the west
until mid-period.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Anticyclonic 05 to 15 in the north-east and south-west until
mid-period, otherwise NW 15 to 25 reaching 30 in the south-
east at first and over the southern half from mid-period.
VIS : Good, but moderate in showers and rain in the south-east at
first and over the southern half in die second half of the
period.
SEA STATE: 3.0 to 4.0m reaching 5.0 to 6.0m in the south, with W to SW
swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/05/30 AT 1600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE FORCE 8 OVER FAR SOUTHERN CRO.
PART 2: GENERAL SYNOPSIS, 26/05/30 AT 1200UTC
-HIGH 1030 HPA OVER AMS AT FIRST AND HIGH 1033 HPA OVER CRO MOVING
SLOWLY NORTH-EASTWARD. BETWEEN THE TWO CELLS, COLD FRONT AXIS
35S/50E, 40S/44E, 39S/65E, 44S/80E, 50S/94E.
- ARRIVAL OF A COLD FRONT CG FROM THE SW OF CRO SOON.
PART 3: FORECAST FOR 24 HOURS FROM 26/05/30 AT 1800UTC TO 26/05/31
AT 1800UTC
WAM (30S/40S, 50E/65E)
RAIN, SHOWERS, AND SQUALLS WITH CF, FOLLOWED BY RAIN AND
THUNDERSTORMS OVER NORTHWESTERN AREA SOON.
WIND : EASTERLY 5/6 OVER SOUTHERN AREA AT FIRST THEN ANTICLOCKWISE
2/4 EVERYWHERE, INCREASING SE 4/5 LOCALLY 6 AT END.
SEA : MODERATE TO ROUGH.
VIS: POOR TO VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
RAIN AND FRONTAL SHOWERS WITH CF.
WIND : NW 5/6 LOCALLY 7 AHEAD THE FRONT AND BACKING SE 5/6 LOCALLY 7
BEHIND THEN ANTICLOCKWISE 2/4 FROM THE W AT END.
SEA : MODERATE TO ROUGH.
VIS: POOR TO VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
RAIN AND FRONTAL SHOWERS WITH THE ARRIVAL OF CG.
WIND : ANTICLOCKWISE 3/5, INCREASING NW 6/7 LOCALLY 8 AHEAD THE FRONT
OVER SOUTHERN AREA ,BACKING SW 4/6 BEHIND THE FRONT.
SEA : ROUGH OVER NORTHERN, VERY ROUGH OVER SOUTHERN. SOUTHWEST SWELL
4 TO 5 M OVER SOUTHERN.
VIS : POOR TO VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
RAIN OR SHOWERS WITH CF OVER NORTH-EASTERN AREA AT FIRST.
WIND : NORTHWEST 6/7 AHEAD OF THE COLD FRONT, BACKING S 4/6 BEHIND
IT, THEN ANTICLOCKWISE 3/4 OVER NORTHERN AREA, INCREASING NW 5/7
OVER SOUTHERN AREA LATER.
SEA : ROUGH TO VERY ROUGH. SW SWELL 4 TO 6 M OVER SOUTHERN AREA.
VIS : POOR TO VERY POOR DURING PRECIPITATION.=