WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
12th OF MAY 2026 AT 13:30 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 122200 TO 132200 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. TRISTAN: W to NW 35 in the south-east towards mid-period.
2. CAPE WEST: W to SW 35 to 40 in south-east until mid-period
3. CAPE EAST: W to SW 35 to 45 in the north-west and the south-west,
drifting to the central and eastern parts by mid-period.
4. MARION FORTIES EAST: W to SW 35 to 45 in the north-west and the south-
west, drifting to the central and eastern parts by
mid-period.
SYNOPTIC CHART 12:00Z
=====================
High 1024 hPa 27s05w, High 1012 54s06w
Low 965 hPa 51s33w, Low 960 hPa 57s29e, Low 968 hPa 45s35e
1. Cold Front: 28s28w 37s21w 47s21w into 51s33w
2. Cold front: 32s29e 34s34e 40s39e into 45s35e
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 05 to 10 reaching 20 to 25 in the north-west by mid-
period.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20, but variable 05 to 10 in the south-east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : Anticyclonic 05 to 15 in the south-east, otherwise SE to E 10 to
20 but N to NW 10 to 20 in the south.
VIS : Good, becoming moderate in showers and thundershowers in the
south-west spreading to the central south.
SEA STATE: 3.0 to 3.5m in the south-east, with S to SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Variable 05 to 10 in the south-west at first, otherwise S to SE
10 to 20, reaching 25 to 30 in the south-east towards the end of
the period.
VIS : Good.
SEA STATE: 3.0 to 3.5 in the extreme east, with to SW swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Anticyclonic in the north-east at first drifting to the north-
east, otherwise W to NW 15 to 25, reaching 30 to 35 in the south-
east towards mid-period.
VIS : Good, but moderate to poor in showers and rain in the south-west
but in the south-eastern parts moderating from mid-period.
SEA STATE: 4.5 to 5.5m in the west otherwise 3.0 to 4.0m, with W swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : W to SW 20 to 30 in the east, reaching 35 to 40 in south-east
until mid-period. The north-western parts will become
anticyclonic 05 to 10 in the north, towards the end of the
period, but W to NW 15 to 25 in the south-west.
VIS : Good but moderate to poor in showers and rain in the east and the
south-west.
SEA STATE: 6.0 to 7.0m in the east at first, otherwise 4.0 to 5.0m,
subsiding to 3.0 to 4.0m in the extreme west by mid-period, with
W to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to SW 20 to 30 in the western parts, reaching 35 to 45 in the
north-west and the south-west, drifting to the central and
eastern parts by mid-period.
VIS : Moderate to poor in rain and thundershowers.
SEA STATE: 3.0 to 4.0m in the east at first with NW swell, otherwise 5.0 to
7.0m reaching 8.0 to 9.0m in the central and south-eastern parts,
subsiding in the west by the end of the period, with SW to W
swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : N to NE 10 to 20 in the east reaching 25 in the south-east,
otherwise, W to NW 15 to 25, but SW 20 to 30 in the extreme
south-west towards mid-period.
VIS : Good, but moderate in showers and rain in the south-west by the
end of the period.
SEA STATE: 3.0 to 4.0, reaching 4.5 to 5.5m in the south-west, with SW
swell.
MOZAMBIQUE CHANNEL:
WIND : N to NW 05 to 15 in the south-west, otherwise variable 05 to 10.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to NE 10 to 20 in the south, otherwise E to SE 10 to 20.
VIS : Moderate in rain and showers in places in the north, otherwise
good.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : NW to N 20 to 30 reaching 35 to 45 over the southern parts at
first, and in the northern parts towards the end of the period.
VIS : Moderate to poor in rain and showers.
SEA STATE: 9.0m to 11.0m over the central parts and the southern parts,
subsiding to 6.0 to 8.0m while spreading to the south -east
towards the end of the period, with W to NW swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/05/12 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- NIL.
PART 2: GENERAL SYNOPSIS, 26/05/12 AT 0000UTC
- COLD FRONT CF AXED N/S OVER FAR WESTERN, SLOWLY MOVING EASTWARDS.
- HIGH 1027 NEAR 46S/70E, SLOWLY MOVING NORTHEASTWARDS.
PART 3: FORECAST FOR 24 HOURS FROM 26/05/12 AT 0600UTC TO 26/05/13 AT
0600UTC
WAM (30S/40S, 50E/65E)
FRONTAL RAIN AND SHOWERS OVER SOUTH-WESTERN.
WIND: ANTICLOCKWISE 2 TO 4 OVER NORTHEASTERN, N 5 TO 6 OVER SOUTHWESTERN.
GUSTS.
SEA : MODERATE TO ROUGH FROM NE TO SW, BECOMING VERY ROUGH OVER FAR
SOUTHWESTERN AT END. E SWELL 3 TO 4M OVER FAR SOUTHWESTERN AT END.
VIS : POOR TO VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SHOWERS AND SQUALLS, BECOMING LESS FREQUENT LATER.
WIND: SW 4 TO 5, LOCALLY6 WITH GUSTS, BECOMING ANTICLOCKWISE 3 TO 5 BY SOUTH
LATER.
SEA : MODERATE TO ROUGH FROM WEST TO EAST.
VIS : POOR TO VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
FRONTAL RAIN AND SHOWERS WITH THUNDERSTORMS DUE TO CF.
WIND: N 5 TO 6; LOCALLY 7. GUSTS.
SEA : MODERATE TO ROUGH BECOMING ROUGH, VERY LOCALLY VERY ROUGH OVER FAR
WESTERN AT END. NE SWELL 3 TO 4M AT END OVER FAR SOUTHWESTERN.
VIS : POOR TO VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
WIND: ANTICLOCKWISE 2 TO 4 INCREASING NORTHERLY 4 TO 5 LOCALLY 6 WITH GUSTS
BY WESTERN LATER, BUT E 4 TO 5 LOCALLY 6 OVER SOUTHERN.
SEA : MODERATE TO ROUGH FROM WEST TO EAST, BECOMING ROUGH OVER WESTERN AT
END.
VIS : GOOD. =