WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
23rd OF MAY 2026 AT 16:00 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 232200 TO 242200 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. TRISTAN : SW 35 in the south-west from mid-period.
SYNOPTIC CHART 12:00Z
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High 1023 hPa 31s10e, High 1025 hPa 35s50e
Low 1009 hPa 43s39e
1. Cold Front: 33s01w 40s11e 49s22e 57s30e 62s30e into 61s22e.
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 10 to 15.
VIS : Good.
SEA STATE: 3.0m in the west, with SE swell.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 15, but SW 05 to 15 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : N to NW 10 to 15 in places in the south, otherwise variable 05 to
10.
VIS : Good, but moderate in showers and rain in places in the south.
SEA STATE: 3.0 to 4.0m except in the north-east, with SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Anticyclonic 05 to 15 in the south-west, otherwise SE to S 10 to
20.
VIS : Good.
SEA STATE: 3.0m in the south-west, with SW swell.
TRISTAN (30S/40S, 00E/20W) :
WIND : variable 05 to 10 in the north-east, otherwise W to NW 15 to 25
reaching 30 in the south. It will become SW 25 to 35 in the south-
west from mid-period spreading to the south-east towards the end
of the period.
VIS : Good, but moderate in showers and rain clearing in the west from
mid-period.
SEA STATE: 4.0 to 5.0m, reaching 5.5 to 6.5m in the south but 7.5m in
the south-west towards the end of the period, with SW to W swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : NW to W 20 to 30 in the south-east until mid-period and in the
south-west from mid-period, otherwise anticyclonic 05 to 15, but
SW 10 to 20 in the south until mid-period.
VIS : Good, but moderate in showers and rain in places in the south.
SEA STATE: 3.0 to 4.0m except in the north-east, reaching 4.5m to 5.5m in the
south-west until mid-period, with W to NW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NW 15 to 25, but SW to W 15 to 25 in the south-east. It will
become anticyclonic 05 to 15 in the west towards the end of the
period.
VIS : Good, but moderate to poor in showers and thundershowers in the
east, and moderate in showers and rain in the south-west from mid-
period.
SEA STATE: 3.0m in the extreme east and in the south-west, with SW to S
swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : NE to E 10 to 20 in the north-central parts, otherwise variable 05
to 10.
VIS : Good, but moderate to poor in showers and thundershowers in the
Western and central parts.
SEA STATE: 3.0 to 3.5m in the extreme east, with S to SE swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 05 to 15, but SW 05 to 15 in the south-east from mid-
period.
VIS : Good, but moderate in showers and rain the north.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : S to SE 15 to 25 in the north, but NE to E 10 to 20 in the south.
VIS : Good, but moderate in showers and rain in the north and south-
west.
SEA STATE: 3.0m in the south spreading to the north from mid-period, with S
to SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Cyclonic 20 to 30 in the north at first, otherwise NW to W 15 to
25.
VIS : Good, but moderate in showers and rain in the north-east until
mid-period and in the south-west from mid-period.
SEA STATE: 3.0m in the north-east, but 3.0 to 4.0m in the south-west towards
mid-period, 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)
26/05/23 AT 1600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (Wind gusts may be about 40% stronger than the averages given here).
PART 1: WARNING
Gale force 8 over AMS and KER.
PART 2: GENERAL SYNOPSIS, 26/05/23 AT 1200UTC
- Low 978 hPa near 48S/76E, moving Eastward 15kt.
- High 1025 hPa near 39S/52E moving slowly Eastward.
- Low 1009 hPa near 43S/38E with cold front CG associated and axis 33S/36E, 35S/39E, 41S/42E moving Eastward.
PART 3: FORECAST FOR 24 HOURS FROM 26/05/23 at 1800UTC to 26/05/24 at 1800UTC
WAM (30S/40S, 50E/65E)
Scattered showers then frontal rain and showers under CG by Eastern area at end.
WIND: SW 7 becoming anticlockwise 3 to 4 then N 5 to 6 ahead CG at end over
western area.
SEA : Rough to very rough. SW swell 3 to 5 m abating.
VIS : Poor in precipitation.
AMS (30S/40S, 65E/80E)
Rain and showers over Eastern area then scattered showers.
WIND: SW 7 to 8. Strong gusts.
SEA : Very rough to high. SW swell 5,5 to 6,5 meters.
VIS : Poor to very poor.
CRO (40S/50S, 50E/65E)
Scattered showers then rain or snow under CG by Western area at end.
WIND: SW 6 to 7 over Eastern area with gusts becoming anticlockwise 3 to 4
then NE 5 to 6 ahead CG at end.
SEA : Rough to very rough becoming moderate to rough by Western area. SW
swell 2 to 4 meters.
VIS : Poor under precipitations.
KER (40S/50S, 65E/80E)
Showers and squalls over Eastern area.
WIND: S 7 to 8 with strong gusts becoming anticlockwise 3 to 4 by Western
area.
SEA : Rough to very rough locally high. SW swell 3 to 5 meters.
VIS : Poor to very poor under precipitations.