WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
21ST OF JUNE 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 212200 TO 222200 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: NW 35 in the south-east at first, but SW 35 in the south,
drifting to the south-east towards the end of the period.
2. CAPE WEST: SW 35 in the south-west towards mid-period.
3. MARION FORTIES EAST: W to NW 35 in the south-east at first.
SYNOPTIC CHART 12:00Z
=====================
High 1022 42s12w, High 1031 hPa 33s43e
Low 968 hPa 50s11w, Low 1016 hPa 42s31e
1. Cold Front: 34s26w 40s13w 45s08w into 50s11w
2. Cold Front: 38s16e 40s24e into 42s31e
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 10 to 20.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 05 to 15, but SW 05 to 15 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 05 to 15, but anticyclonic 05 to 15 in the south.
VIS : Good, but moderate in showers and rain in the south.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Variable 05 to 10 in the south, otherwise S to SE 05 to 15
reaching 20 in the extreme north-east at first. It will become W
10 to 20 in the south-west towards the end of the period.
VIS : Good, becoming moderate in showers and rain the extreme south-west
towards the end of the period.
TRISTAN (30S/40S, 00E/20W):
WIND : NW 15 to 25 in the east until mid-period, reaching 30 to 35 in the
south-east at first, otherwise SW 15 to 25 reaching 30 to 35 in
the south, drifting to the south-east towards the end of the
period, while becoming anticyclonic 05 to 15 in the south-west.
VIS : Good, but moderate in showers and rain in the north-west, but in
the east until towards the end of the period.
SEA STATE: 3.0 to 4.0m over the southern half, reaching 5.0 to 7.0m in the
south, drifting to the south-east towards mid-period, with SW
swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Variable 05 to 10 in the east at first, otherwise W to NW 10 to 20
reaching 25 to 30 in the south-west, where it will become SW 25 to
35 towards mid-period.
VIS : Good, but moderate in showers and rain over the southern and
western halves.
SEA STATE: 3.0 to 3.5m in the south and west, reaching 4.0 to 5.0m in the
south-west, but 6.0 to 7.0m towards the end of the period, with W
to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Anticyclonic 05 to 15 in the east, otherwise N to NW 10 to 20
reaching 25 to 30 in the north, but variable 05 to 10 in the west,
where it will become E to NE 10 to 20 towards mid-period.
VIS : Good, but moderate in showers and thundershowers in the south and
in places over the western half.
SEA STATE: 3.0 to 4.0m in the southern parts, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : E to SE 10 to 20 in the east, otherwise N to NE 10 to 20, but NW
10 to 20 in the extreme west.
VIS : Moderate in showers and thundershowers in places, but good in the
west.
SEA STATE: 3.0 to 4.0m in the north and east, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : E to NE 15 to 25 in the south, otherwise S to SE 10 to 20 reaching
25 to 30 in the north-east and south-east.
VIS : Good, but moderate in showers and rain in places in the northern
and south-western parts until towards the end of the period.
SEA STATE: 3.0 to 3.5m in the southern and central parts until towards mid-
period, with S to SE swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : SE 10 to 20, reaching 25 to 30 in the north.
VIS : Moderate in showers and rain in places.
SEA STATE: 4.0 to 5.0m, subsiding to 3.0 to 3.5m towards mid-period, with S
to SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to NW 15 to 25 reaching 30 to 35 in the south-east at first, but
SW 15 to 25 in the west, reaching 30 in the south-west, drifting
to the south-east towards the end of the period.
VIS : Good, but moderate in showers and rain in the north.
SEA STATE: 3.5 to 4.5m, reaching 5.0 to 7.0m in the southern half, 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)
26/06/21 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 WAM, AMS, CRO AND KER.
PART 2: GENERAL SYNOPSIS, 26/06/21 AT 1200UTC
- WAVING FRONT OVER SOUTHERN CRO AND KER.
- LOW 1005 HPA NEAR 36S/67E, EXPECTED 1008 HPA NEAR 36S/73E AT END.
HIGH 1032 HPA NEAR 34S/43E, EXPECTED 1030 HPA NEAR 35S/49E AT END
WITH A RIDGE EXTENDING EASTWARD.
PART 3: FORECAST FOR 24 HOURS FROM 26/06/21 AT 1800UTC TO 26/06/22
AT 1800UTC
WAM (30S/40S, 50E/65E)
SHOWERS AND SQUALLS OVER EASTERN AREA.
WIND: SOUTHERLY 5 TO 6, 7 TO 8 OVER EASTERN WITH GUSTS SETTING-UP
ANTICLOCKWISE 3 TO 4 BY WESTERN DURING THE DAY.
SEA : ROUGH TO VERY ROUGH, LOCALLY HIGH OVER EASTERN . SOUTHWESTERLY
SWELL 3 TO 5 M.
VIS : VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SHOWERS AND SQUALLS.
WIND: CLOCKWISE 5 TO 7, INCREASING LOCALLY 8 WESTERN CENTRE WITH
GUSTS. SOUTH 6 TO 7 BY WESTERN AREA AT END.
SEA : BECOMING ROUGH TO VERY ROUGH, LOCALLY HIGH OVER NORTH-WESTERN.
CLOCKWISE SWELL 3 TO 4 M.
VIS : VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
SHOWERS.
WIND: WESTERLY 5 TO 6, INCREASING 7 TO 8 OVER SOUTHERN WITH GUSTS.
ANTICLOCKWISE 3 TO 5 OVER NORTH-WESTERN AT END.
SEA : ROUGH TO HIGH FROM NORTH TO SOUTH BECOMING VERY ROUGH TO VERY
HIGH AT END. SOUTH-WEST SWELL 3 TO 5 M, INCREASING 5 TO 7 M FROM
NORTH TO SOUTH AT END.
VIS : VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
SHOWERS.
WIND:WESTERLY 5 TO 6 OVER NORTHERN, INCREASING 7 TO 8 OVER SOUTHERN
WITH GUSTS.
SEA : ROUGH TO VERY ROUGH, BECOMING HIGH BY SOUTHERN DURING THE DAY,
THEN VRY HIGH OVER FAR SOUTHWESTERN AT END. SOUTHWEST SWELL 3 TO 4 M,
INCREASING 4 TO 6 M LATER.
VIS : POOR TO VERY POOR IN PRECIPITATION.