WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
31ST 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 311000 TO 011000 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:
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1. CAPE WEST: W to NW 35 in the south-east until mid-period.
2. MARION FORTIES EAST: NW 35 in the south.
SYNOPTIC CHART 06:00Z
=====================
High 1027 hPa 35s32w, High 1028 hPa 39s38e
Low 960 hPa 55s20e
1. Cold front: 33s01e 43s12e 50s21e into 55s20e.
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 : Anticyclonic 05 to 15 in the central parts, otherwise SE to E
10 to 20.
VIS : Good, but moderate in showers and rain in the south.
SEA STATE: 3.0 to 3.5m in the south, subsiding from mid-period, with SW
swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 10 to 20, but Anticyclonic 05 to 15 in the south.
VIS : Good.
TRISTAN (30S/40S, 00E/20W) :
WIND : SW 10 to 20 in the south, otherwise SE 10 to 20, becoming
Anticyclonic 05 to 15 in the central west from mid-period,
spreading to the central parts by the end of the period.
VIS : Good, but moderate in showers and thundershowers in the north.
SEA STATE: 3.0 to 4.0m, with W to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : SE 05 to 10 in the east, otherwise W to NW 15 to 25 reaching
30 to 35 in the south-east until mid-period, but SW 15 to 25
in the south-west, spreading to the west and south-east from
mid-period.
VIS : Good, but moderate in showers and thundershowers in the west
spreading to the south-east from mid-period.
SEA STATE: 3.0 to 4.0m except in the north-east, reaching 4.5 to 5.0m in
the south-east until mid-period, with W to SW swell but NW
swell in the south-east until mid-period.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : E to NE 05 to 15 reaching 20 to 30 in places in the central
parts and east, becoming NW to W 05 to 15 in the south-west
from mid-period reaching 20 to 25.
VIS : Good, but moderate in showers and thundershowers in the
extreme south-east by the end of the period.
SEA STATE: 3.0 to 3.5m in the east and extreme south-west from mid-
period, with SW to S swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : E to SE 05 to 15 reaching 20 to 25 in the south-east, but NE
15 to 25 in the extreme south-west.
VIS : Good, but moderate in showers and thundershowers in places in
the east.
SEA STATE: 3.0m in the south-east, with S to SE swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 20 reaching 25 in the south-east at times.
VIS : Good, but moderate in rain and showers in the east at times.
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 thundershowers in places in
the south, spreading to the north from mid-period.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Anticyclonic 05 to 15 in the north-east at first, otherwise NW
15 to 25 reaching 30 to 35 in the south.
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.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
2026/05/31 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE CONTINUING OR EXPECTED OVER AMS, CRO AND KER.
PART 2: GENERAL SYNOPSIS, 26/05/31 AT 0000UTC
- LOW DEEPENING 1011 IN FAR SOUTHEAST OF AMS IN A TROUGH WITH COLD FRONT TILL SOUTH OF WAM, MOVING EASTWARDS.
- SQUALLY LINE IN NORTHWEST OF WAM.
- DISTURBED FRESH OR STRONG WESTERLY FLOW IN FAR SOUTHERN AREAS.
- HIGH BELT 1031 ALONG 62E, LITTLE CHANGE.
PART 3: FORECAST FOR 24 HOURS FROM 26/05/31 AT 0600UTC TO 26/06/01 AT 0600UTC
WAM (30S/40S, 50E/65E)
RAIN, SHOWERS AND THUNDERSTORMS WITH SEVERE GUSTS.
WIND: MAINLY EASTERLY 3 TO 5, AT TIMES 6 IN NORTHWEST.
SEA : MODERATE OR ROUGH.
VIS : POOR TO VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
RAIN AND SHOWERS.
WIND:
- IN FAR SOUTHEAST: INCREASING CLOCKWISE 7 OR 8, DECREASING SOUTH 5 OR 6 LATER. SEVERE GUSTS.
- ELSEWHERE: ANTICLOCKWISE 3 TO 5.
SEA : MODERATE OR ROUGH, BECOMING ROUGH OR VERY ROUGH IN FAR SOUTHEAST.
VIS : POOR TO VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
RAIN AND SHOWERS.
WIND: NORTHWESTERLY 6 OR 7 WITH SEVERE GUSTS, AT TIMES 8 AT FIRST THEN
LATER IN FAR SOUTH, BUT ANTICLOCKWISE 3 TO 5 IN FAR NORTH.
SEA : ROUGH OR VERY ROUGH, LOCALLY HIGH AND CROSSED IN SOUTH. SW SWELL
4 OR 5 M IN SOUTH.
VIS : POOR TO VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
RAIN AND SHOWERS.
WIND: NORTHWESTERLY 6 OR 7 WITH SEVERE GUSTS, AT TIMES 8 AT FIRST THEN AT
END IN FAR SOUTH, BUT ANTICLOCKWISE 3 TO 5 IN FAR NORTH.
SEA : ROUGH OR VERY ROUGH, BECOMING HIGH IN FAR SOUTHWEST. SW SWELL 4 OR
5 M IN SOUTH.
VIS : POOR TO VERY POOR DURING PRECIPITATION.