WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
30TH OF MAY 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 301000 TO 311000 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: S to SW 35 to 45 in the south-central drifting to the south-
east by mid-period.
2. CAPE WEST: NW to N 35 in the south-west.
3. MARION FORTIES EAST: NW 35 to 40 in the south-east until mid-period.
SYNOPTIC CHART 06:00Z
=====================
High 1024 hPa 32s11e, High 1034 hPa 44s50e
Low 992 hPa 44s05w, Low 1024 hPa 33s42e
1. Cold front: 25s20w 30s15w 35s10w 40s05w into 44s05w.
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, but SW to W 10 to 20 in the
south-west otherwise SE to E 05 to 15.
VIS : Good, but moderate to poor in showers and thundershowers in
the south-west drifting to the south-east by the end of the
period.
SEA STATE: 3.0 to 4.0m in the south-west, with W to SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 10 to 20, 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, otherwise S to SW 20 to 30 spreading
to the east in the second half of the period, reaching 35 to
45 in the south-central drifting to the south-east by mid-
period.
VIS : Moderate to poor in showers and thundershowers becoming good
in the south-west towards mid-period.
SEA STATE: 3.5 to 4.5m reaching 5.0m in the south-east towards mid-
period, with NW to W swell, but SW to S in the south-west.
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.
VIS : Good, but moderate to poor in showers and thundershowers in
the south-west.
SEA STATE: 3.0 to 4.0m in the south reaching 4.5 to 5.0m in the south-
west, 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
reaching 20 to 25 in the south-east at first.
VIS : Good, but moderate in showers and thundershowers in the east.
SEA STATE: 3.0 to 4.0m in the central and eastern parts, with SW to S
swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : S to SE 05 to 15, but NE to E 10 to 20 in the south-east.
VIS : Good, but moderate to poor in showers and thundershowers in
the south-east.
SEA STATE: 3.0m in the south, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 05 to 15 reaching 20 in the south-east at times.
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.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : NE 05 to 15 in the north-east, otherwise NW 20 to 30 reaching
35 to 40 in the south-east until mid-period, but SW 15 to 25
in the extreme south-west spreading to the south-east by mid-
period. It will become NW to N 20 to 30 in the south-west
towards the end of the period.
VIS : Good, but moderate in showers and rain in the south.
SEA STATE: 3.0 to 4.0m reaching 5.0 to 6.0m in the south, with W to SW
swell but NW in the south until mid-period.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/05/30 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE FORCE 8 EXPECTED OVER FAR SOUTHERN CRO.
PART 2: GENERAL SYNOPSIS, 26/05/30 AT 0000UTC
- A HIGH-PRESSURE SYSTEM OF 1030 HPA OVER AMS AT THE START AND A HIGH-PRESSURE SYSTEM OF 1034 HPA OVER CRO MOVING SLOWLY EASTWARD.
BETWEEN THE TWO CELLS, COLD FRONT AXIS 37S/45E, 40S/44E, 41S/50E, 44S/60E, 47S/65E, 50S/68E, 41S/70E, 60S/78E.
PART 3: FORECAST FOR 24 HOURS FROM 26/05/30 AT 0600UTC TO 26/05/31 AT 0600UTC
WAM (30S/40S, 50E/65E)
RAIN, SHOWERS, AND SQUALLS OVER SOUTH WITH CF, FOLLOWED BY RAIN AND THUNDERSTORMS OVER NORTHWESTERN AREA BY THE END OF THE FORECAST PERIOD.
WIND : ANTICLOCKWISE 3 TO 5, INCREASNG 5/6 FROM THE SOUTHEAST OVER
SOUTHERN BEHIND THE COLD FRONT CF, THEN SETTING-UP 4 TO 6 ENE OVER
NORTHERN REGION BY THE END OF THE PERIOD.
SEA : MODERATE TO ROUGH. SOUTHWEST SWELL 1.5 TO 2.5 M.
VIS : POOR TO VERY POOR DURING PRECIPITATION.
AMS (30S/40S, 65E/80E)
RAIN AND FRONTAL SHOWERS WITH A COLD FRONT OVER THE SOUTHERN PART OF THE REGION.
WIND : ANTICLOCKWISE 3/5, FRESHENING NW 5/6 SHEAD OF THE COLD FRONT AND
BACKING SE 4 TO 6 BEHIND IT.
SEA : MODERATE TO ROUGH. SOUTHWEST SWELL 1.5 TO 2.5 M OVER SOUTHERN
SECTOR.
VIS : GOOD, BECOMING POOR TO VERY POOR.
CRO (40S/50S, 50E/65E)
RAIN AND FRONTAL SHOWERS WITH THE ARRIVAL OF A NEW FRONT OVER THE SOUTHWEST REGION TOWARD THE END OF THE FORECAST PERIOD.
WIND : ANTICLOCKWISE 3 TO 5, FRESHENING NW 7/8 AHEAD OF A NEW FRONT OVER
THE SOUTHERN REGION,BACKING SE 4 TO 6 BEHIND THE FRONT TOWARD THE
END OF THE FORECAST PERIOD.
SEA : ROUGH OVER NORTHERN, VERY ROUGH OVER SOUTHERN. SOUTHWEST SWELL
3 TO 5 M OVER SOUTHERN.
VIS : POOR TO VERY POOR DURING PRECIPITATION.
KER (40S/50S, 65E/80E)
RAIN OR SHOWERS WITH A COLD FRONT CF.
WIND : NORTHWEST 6/7 AHEAD OF THE COLD FRONT, BACKING SW 4 TO 6 BEHIND
IT, THEN ANTICLOCKWISE 3/4 OVER NORTHERN AREA, FRESHENING NW
5 TO 7 OVER SOUTHERN AREA BY THE END OF THE FORECAST PERIOD.
SEA : ROUGH TO VERY ROUGH. WESTRLY SWELL 2 TO 4 M, THEN SW SWELL 3 TO
5 M OVER SOUTHWESTERN AREA.
VIS : POOR TO VERY POOR DURING PRECIPITATION.