WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
28TH 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 281000 TO 291000 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 EAST: S to SE 35 in the west towards mid-period, drifting to the
central parts towards the end of the period.
2. MARION FORTIES EAST: W to SW 35 in the south towards mid-period.
SYNOPTIC CHART 06:00Z
=====================
High 1024 hPa 32s07e, High 1037 hPa 37s64e
Low 1008 hPa 33s14w, Low 949 hPa 64s35e
1. Cold front: 33s16e 40s29e 45s35e 50s40e 55s44e 60s47e into 64s35e
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 10 to 20.
VIS : Good.
SEA STATE: 3.0m, subsiding from the south-west towards mid-period with S
to SW swell.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20, but SW 05 to 10 in the east.
VIS : Good.
SEA STATE: 3.0 to 3.5m in the south-west, with S swell.
ST HELENA (15S/30S, 00E/20W):
WIND : N to NW 15 to 25 in the south, otherwise SE to E 10 to 15.
VIS : Good, but moderate in showers and thundershowers in the south-
west.
SEA STATE: 3.0m in the north-east and south-west, with S to SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 15 to 25, but anticyclonic 05 to 10 in the south-west.
VIS : Good.
SEA STATE: 3.0 to 3.5m, with S to SW swell.
TRISTAN (30S/40S, 00E/20W) :
WIND : N to NW 15 to 25.
VIS : Moderate to poor in showers and thundershowers.
SEA STATE: 3.0 to 3.5m, subsiding from the west towards mid-period, with
SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : S to SE 10 to 20 in the north-east, otherwise anticyclonic 05
to 15, but N to NW 15 to 25 in the south-west.
VIS : Good, but moderate in showers and rain in the south-east until
mid-period, but in the south-west towards the end of the
period.
SEA STATE: 3.0 to 4.0m reaching 4.5 to 5.5m in the south-east until mid-
period, with SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NW 10 to 20 in the east, otherwise W to SW 10 to 20 but S
to SE 10 to 20 in the west where it will reach 25 to 35
towards mid-period, drifting to the central parts towards the
end of the period, while becoming E to NE 15 to 25 in the
west.
VIS : Moderate in showers and thundershowers.
SEA STATE: 3.0 to 4.0m in the south and western half, reaching 4.5 to
5.0m in the south-west until mid-period, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : SE 05 to 15 over the central parts, otherwise NE to E 10 to 20
but S to SW 05 to 15 in the extreme west, reaching 20 to 25 in
the south-west towards the end of the period.
VIS : Good but moderate to poor in showers and thundershowers in the
east, but in the south-west towards the end of the period.
SEA STATE: 3.0m in the extreme east with E to SE swell, but in the south-
west from mid-period with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 05 to 15, but variable 05 to 10 in the south-west.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : Variable 05 to 10 in the south, otherwise E to SE 05 to 15
reaching 20 to 25 in the north.
VIS : Moderate in showers and thundershowers, but good in the south.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : NW 15 to 25 in the east, otherwise W to SW 15 to 25 reaching
30 to 35 in the south towards mid-period.
VIS : Good, but moderate to poor in showers and rain in the east
until towards the end of the period.
SEA STATE: 3.0 to 4.0m reaching 5.0m in the south-west, with SW to W
swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
2026/05/28 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE AT FIRST OVER FAR NORTH-EASTERN AMS AND FAR SOUTH-EASTERN KER.
PART 2: GENERAL SYNOPSIS, 2026/05/28 AT 0000UTC
- FILLING LOW 1009 NEAR 32S/77E, STEADILY MOVING NORTH-EASTWARD.
- HIGH 1036 NEAR 38S/62E, SLOW-MOVING.
- WAVING FRONT SLOW-MOVING OVER FAR SOUTH-WESTERN WAM, CRO THEN KER.
PART 3: FORECAST FOR 24 HOURS FROM 2026/05/28 AT 0600UTC TO 2026/05/29 AT 0600UTC
WAM (30S/40S, 50E/65E)
FRONTAL RAIN AND SHOWERS OVER FAR SOUTH-WESTERN. SHOWERS AND SQUALLS OVER FAR NORTH-EASTERN.
WIND: ANTICLOCKWISE 3/4 AT TIMES 5, NORTH EASTERLY 5/6 OVER FAR NORTH-
EASTERN. INCREASING SOON NORTHERLY 5/6 OVER FAR SOUTHERN. GUSTS.
SEA : MODERATE TO ROUGH.
VIS : POOR OR VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SHOWERS AND SQUALLS OVER NORTH-EASTERN BECOMING GRADUALLY MORE SCATTERED.
WIND: SOUTH-EASTERLY 6/7 OVER NORTH-EASTERN AT TIMES 8 WITH GUSTS,
DECREASING GRADUALLY 5/6, BUT ANTICLOCKWISE 3/4 ELSEWHERE AT TIMES
5.
SEA : ROUGH TO VERY ROUGH, BUT LOCALLY HIGH OVER NORTH-EASTERN BY SW
SWELL 4 TO 6M ABATING. BECOMING GRADUALLY MODERATE TO ROUGH FROM
SOUTH-WEST.
VIS : POOR OR VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
FRONTAL RAIN AND SHOWERS.
WIND: NW 4/5 AT TIMES 6, INCREASING 5/6 AT TIMES 7. BACKING SW 4/5 LATER
OVER WESTERN. GUSTS.
SEA : ROUGH, BECOMING VERY ROUGH OVER SOUTH-WESTERN AT END BY WESTERLY
SWELL 3 TO 4M.
VIS : POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
SCATTERED SHOWERS, THEN FRONTAL RAIN AND SHOWERS SOON FROM SOUTH-WEST.
WIND: SOUTH-WESTERLY 3/4 A TIMES 5, BUT 6/7 AT FIRST OVER FAR SOUTH-
EASTERN AT TIMES 8 WITH GUSTS. VEERING GRADUALLY NW 5/6 FROM WEST.
SEA : ROUGH TO VERY ROUGH BY SW SWELL 3 TO 5M, FROM NORTH-WEST TO SOUTH-
EAST, LOCALLY HIGH AT FIRST OVER FAR SOUTH-EASTERN.
VIS : POOR IN PRECIPITATION.