WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
27th OF MAY 2026 AT 16:30 UTC.
FOR SOUTH-EAST SECTOR OF METAREA. VII, PREPARED BY REUNION, SEE AREA 2
BELOW.
NOTE: WX OBSERVATIONS.
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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 272200 TO 282200 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. MARION FORTIES EAST: W to NW 35 in the south-west.
SYNOPTIC CHART 12:00Z
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High 1035 hPa 39s62e High 1022 hPa 27s05w.
Low 951 hPa 57s18e, Low 1016 hPa 41s43.
Cold front: 35s07e 40s15e 45s21e 50s26e 55s31e 59s30e into 57s18e.
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 10 to 20.
VIS : Good.
SEA STATE: 3.0m in places, 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 10 to 20 in the south-west, otherwise SE to E 10 to 15
but variable 05 in the south-east.
VIS : Good, but moderate in showers and thundershowers in the south-
west.
SEA STATE: 3.0 to 3.5m, with S to SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Anticyclonic 05 to 10 in the south-west, otherwise S to SE 15
to 25.
VIS : Good.
SEA STATE: 3.0 to 3.5m, with SW swell.
TRISTAN (30S/40S, 00E/20W) :
WIND : Variable 05 to 10 in the east for the first half of the
period, otherwise N to NW 10 to 20.
VIS : Good in the east and south for the first half of the period,
otherwise moderate in showers and thundershowers.
SEA STATE: 3.0 to 3.5m reaching 4.0m in the south-east at first, with SW
swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : W to SW 10 to 15 in the south for the first half of the
period, otherwise anticyclonic 05 to 15. It will become N to
NW 10 to 20 in the west towards the end of the period.
VIS : Moderate in showers and rain over the central and south-
eastern parts, otherwise good.
SEA STATE: 3.0 to 4.0m reaching 5.0 to 5.5m in the south, with SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NW 10 to 20 reaching 25 in the south-west at first. It
will become S to SE 10 to 20 in the west from mid-period.
VIS : Moderate in showers and thundershowers.
SEA STATE: 3.0 to 4.0m in the west, spreading to the central parts by
mid-period while reaching 4.5 to 5.0m in the south-west, with
SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : NE to E 10 to 20 reaching 25 in the east but SE to E 05 to 15
over the central parts.
VIS : Good but moderate to poor in showers and thundershowers in the
east.
SEA STATE: 3.0m in the extreme east, with E to SE swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 15.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : Variable 05 but E to SE 10 to 15 in the north.
VIS : Good, but moderate in showers and thundershowers in the south
and east.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to NW 15 to 25 reaching 30 to 35 in the south-west.
VIS : Moderate to poor in showers and rain.
SEA STATE: 3.0m reaching 4.0 to 5.0m in the south-west and extreme 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)
26/05/27 AT 1600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (Wind gusts may be about 40% stronger than the averages given here).
PART 1: WARNING
Strong gale over AMS.
PART 2: GENERAL SYNOPSIS, 26/05/27 AT 1200UTC
- Filling low 1005 hPa near 36S/78E, moving northeastward, leaving AMS at first.
- Cold front CG moving over CRO.
- Between, high 1035 hPa near 38S/62E, moving slowly eastward.
PART 3: FORECAST FOR 24 HOURS FROM 26/05/27 at 1800UTC to 26/05/28 at 1800UTC
WAM (30S/40S, 50E/65E)
Scattered showers, later over northwestern and southwestern.
WIND : Anticlockwise 3 to 5, increasing later Easterly 6 over northwestern and Northwest 6 over southern.
SEA : Moderate to rough. At first, southerly swell 3 meters over eastern.
VISIBILITY : moderate under showers.
AMS (30S/40S, 65E/80E)
Rain, showers and squall.
WIND : eastern : clockwise 7 to 9 decreasing later southerly 5/6, western, southerly 5/6 then anticlockwise 3 to 5. Gusts
SEA : rough to high from west to east, later, moderate to very rough. Southwest swell 3 to 5 meters decreasing by southwest.
VISIBILITY: Very poor on rain.
CRO (40S/50S, 50E/65E)
Frontal rain and showers.
WIND : north of CG, northwest 5/6, south of CG, at first, anticlockwise 3 to 5, later, northerly 4/5, at end, northwest 6 over southwestern.
SEA : moderate to rough. Southwest 3 to 4 m over southern and eastern, decreasing 3 m at end over southeastern.
VISIBILITY : poor on rain.
KER (40S/50S, 65E/80E)
Showers over southern.
WIND : westerly 6/7 over southern, anticlockwise 3 to 5 over northern. Later westerly 4/5. At end over southwestern, Northerly 5/6.
SEA : Rough to very rough. Southwest swell 3 m, later 4 to 5 m over southern.
VISIBILITY : moderate on showers.