WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
31ST OF MAY 2026 AT 17:00 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 312200 TO 012200 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. MARION FORTIES EAST: W to NW 35 in the south, drifting to the south-
east from mid-period.
SYNOPTIC CHART 12:00Z
=====================
High 1027 hPa 35s29w
Low 955 hPa 57s28e
1. Cold front: 32s01e 41s12e 50s29e 63s30e into 57s28e.
AREA FORECAST:
==============
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 : Variable 05 to 10 in the central parts, otherwise SE to E
10 to 20.
VIS : Good, but moderate in showers and rain in the south.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 05 to 15 reaching 20 in the south.
VIS : Good.
TRISTAN (30S/40S, 00E/20W) :
WIND : SE 10 to 20 in the north-east, otherwise anticyclonic 05 to
15, becoming NW 15 to 25 in the west towards the end of the
period reaching 30.
VIS : Good, but moderate in showers and thundershowers in the north.
SEA STATE: 3.0 to 4.0m, with S to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : NW to W 15 to 25 in the central parts and south-east until
mid-period reaching 30, otherwise S to SW 05 to 15, reaching
20 to 30 in places.
VIS : Good, but moderate in showers and thundershowers in the north-
west and south-east, spreading to the east from mid-period.
SEA STATE: 3.0 to 4.0m except in the north-east, with W to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : E to NE 10 to 20 reaching 25 to 30 in places in the central
parts and north-east, but NW to W 05 to 15 in the south-west
reaching 20 to 25.
VIS : Good, but moderate in showers and thundershowers in the south-
east and extreme south-west from mid-period, spreading to the
west by the end of the period.
SEA STATE: 3.0 to 3.5m in the east and extreme south, with SW to S swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : E to SE 05 to 15, but NE 15 to 25 in the extreme south-west
and south-east.
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, becoming variable 05 to 10 in the south from
mid-period.
VIS : Good, but moderate in rain and showers in the east until mid-
period.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : NE 05 to 15 in the south, otherwise E to SE 10 to 20.
VIS : Good, but moderate in showers and thundershowers in places.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to NW 15 to 25 reaching 30 to 35 in the south, drifting to
the south-east from mid-period.
VIS : Good, but moderate in showers and rain in the south and west.
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)
26/05/31 AT 1600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE CONTINUING OVER AMS AT FIRST.
PART 2: GENERAL SYNOPSIS, 26/05/31 AT 1200UTC
- LOW 1012 NEAR 38S/80E MOVING EASTWARDS AT FIRST. ASSOCIATED COLD
FRONT EXTENDING NW, 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 1800UTC TO 26/06/01
AT 1800UTC
WAM (30S/40S, 50E/65E)
RAIN, SHOWERS AND THUNDERSTORMS WITH SEVERE GUSTS OVER NORTHERN AREA.
WIND: MAINLY E 3 TO 5, AT TIMES 6 OVER NORTHWESTERN.
SEA: MODERATE OR ROUGH.
VISIBILITY: POOR TO VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
RAIN AND SHOWERS OVER EASTERN AT FIRST, THEN SCATTERED SHOWERS.
WIND:
- IN FAR SOUTHEAST: CLOCKWISE 7 OR 8, DECREASING S 5 OR 6 LATER.
SEVERE GUSTS.
- ELSEWHERE: ANTICLOCKWISE 3 TO 5.
SEA: MODERATE OR ROUGH, LOCALLY ROUGH OR VERY ROUGH IN FAR SOUTHEAST.
VISIBILITY: POOR TO VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
RAIN AND SHOWERS OVER FAR SOUTHERN, SCATTERED SHOWERS ELSEWHERE.
WIND: OVER SOUTHERN : MAINLY W 6 OR 7 WITH SEVERE GUSTS. OVER
NORTHERN : ANTICLOCKWISE 3 TO 5, BECMONG W OR SW 5 OR 6 LATER.
SEA: ROUGH OR VERY ROUGH, LOCALLY HIGH AND CROSSED OVER SOUTHERN. SW
SWELL 4 OR 5 M OVER SOUTHERN.
VISIBILITY: POOR TO VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
RAIN AND SHOWERS.
WIND: OVER SOUTHERN : MAINLY W 6 OR 7 WITH SEVERE GUSTS. OVER
NORTHERN : W THEN SW 5 OR 6 WITH GUSTS.
SEA: ROUGH OR VERY ROUGH, LOCALLY HIGH OVER FAR SOUTHERN. SW SWELL 4
OR 5 M OVER SOUTHERN.
VISIBILITY: POOR TO VERY POOR DURING PRECIPITATION.=