WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
17TH OF JUNE 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 171220 TO 182200 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 : N to NW 35 to 40 in the west and south-west, spreading to
the south-east from mid-period.
2. CAPE EAST : W to SW 35 in the central south from mid-period.
3. MARION FORTIES EAST: W to NW 35 in the north and north-west.
SYNOPTIC CHART 12:00Z
=====================
High 1032 hPa 34s01e, High 1024 hPa 33s71e
Low 1012 hPa 29s28w, Low 996 hPa 52s13e, Low 964 hPa 60s70e.
1. Cold Front: 37s33e 40s45e 45s55e 50s65e into 60s70e.
2. Cold Front: 16s29w 21s29w 25s27w into 28s28e.
3. Cold Front: 38s06w 41s09e 49s22e 55s22e into 52s13e.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 15 to 25.
VIS : Good.
SEA STATE: 3.0 to 4.0m, with E to SE swell.
ANGOLA (06S/15S, 00E/00N):
WIND : SW 05 to 15 in the east, otherwise S to SE 10 to 20, reaching
25 to 30 in the south and south-east.
VIS : Good.
SEA STATE: 3.0 to 3.5m int the south-east, with SE swell.
ST HELENA (15S/30S, 00E/20W):
WIND : N to NE 15 to 25 in the west and south-west, otherwise E to SE
15 to 25.
VIS : Good, but moderate to poor in showers and thundershowers in
the extreme south-west.
SEA STATE: 3.0 to 4.0m, except in the south-east, with E to SE swell, but
NW in the south-west.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 15 to 25, reaching 30 in the south-east.
VIS : Good, but moderate in thundershowers in the south-east.
SEA STATE: 3.0 to 3.5m, with SE swell.
TRISTAN (30S/40S, 00E/20W):
WIND : N to NW 15 to 25, reaching 30 to 40 in the west and south-
west, spreading to the south-east from mid-period.
VIS : Good, but moderate to poor in showers and thundershowers in
the west and southern parts, spreading to the north-west
towards mid-period.
SEA STATE: 3.0 to 4.0m, except in the north-east, reaching 4.5 to 5.0m in
the south-west, spreading to the central south during the
second half of the period, with NW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : NW 15 to 25 in the south-west, and SW 15 to 25 in the south-
east, otherwise S to SE 15 to 25.
VIS : Good, but moderate in showers and rain in places in the east
and south-east.
SEA STATE: 3.0 to 4.0m in the south-east with a SW swell, but SE in the
north-east.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to SW 15 to 25, reaching 30 to 35 in the central south from
mid-period.
VIS : Moderate in showers and rain in places.
SEA STATE: 3.0 to 4.0m, reaching 5.0 to 6.0m in the central south and the
south-west, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Anticyclonic 05 to 15 in the west, and E to SE 10 to 15 in
the northern parts, otherwise W to SW 10 to 20.
VIS : Good, but moderate to poor in showers and thundershowers in
the east and south-east, but moderate in showers and rain in
the west.
SEA STATE: 3.0 to 3.5m in the south-east, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 05 to 15, reaching 20 to 25 in the south-east.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : Variable 05 to 10 in the south, otherwise E to SE 10 to 20,
reaching 25 in the extreme north-west.
VIS : Moderate in showers and rain in places.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : SW 10 to 20 in the extreme east at first, otherwise W to NW 20
to 30 reaching 35 in the north and north-west. It will become
SE 20 to 30 in the west and south-west during the second half
of the period.
VIS : Good, but moderate in showers and rain in the southern half,
spreading to the north from the morning.
SEA STATE: 3.0 to 4.0m, reaching 5.0 to 5.5m in the north-west from mid-
period, with SW swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/06/17 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE OVER KER AND AMS.
PART 2: GENERAL SYNOPSIS, 26/06/17 AT 0000UTC
- LOW 1007 NEAR 40S/51E, STEADILY MOVING EASTWARD, WITH ASSOCIATED COLD FRONT (CF) AXIS 29S/48E, 35S/53E, 40S/53E.
- WAVING FRONT OVER SOUTHERN CRO AND KER, MERGING WITH THE COLD FRONT.
- HIGH 1028 NEAR 32S/65E STEADILY MOVING EASTWARD.
PART 3: FORECAST FOR 24 HOURS FROM 26/06/17 AT 0600UTC TO 26/06/18 AT 0600UTC
WAM (30S/40S, 50E/65E)
FRONTAL RAIN, SHOWERS AND SQUALLS, AT TIMES THUNDERY. SHOWERS LOCALLY THUNDERY BEHIND.
WIND: N 6/7 AHEAD OF CF, BACKING SW 5/6 BEHIND AT TIMES 7. GUSTS.
SEA : ROUGH TO VERY ROUGH. SW SWELL AROUND 3M, INCREASING 4 TO 5M OVER
SOUTHERN LATER.
VIS: POOR OR VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SCATTERED SHOWERS. FRONTAL RAIN, SHOWERS AND SQUALLS, AT TIMES THUNDERY, OVER WESTERN LATER.
WIND: ANTICLOCKWISE 3/4 AT TIMES 5, INCREASING GRADUALLY N 5/6 FROM WEST AND
7/8 IN THE VICINITY OF CF. GUSTS.
SEA : ROUGH TO VERY ROUGH BY SW SWELL 3 TO 4M.
VIS : POOR OR VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
FRONTAL RAIN, SHOWERS AND SQUALLS.
WIND: NW 6/7 AHEAD OF CF, BACKING SW 5/6 BEHIND AT TIMES 7. GUSTS. BECOMING
ANTICLOCKWISE 3/4 OVER NORTH-WESTERN AT END AT TIMES 5.
SEA : VERY ROUGH TO HIGH BY SW SWELL 3 TO 5M. CROSSED SEA IN THE VICINITY OF
CF.
VIS : POOR OR VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
LIGHT FRONTAL RAIN AND SHOWERS OVER SOUTHERN, BUT SHOWERS OVER NORTHERN, THEN FRONTAL RAIN, SHOWERS AND SQUALLS WITH CF FROM WEST LATER.
WIND: NORTH-WESTERLY 5/6 AT TIMES 7, LOCALLY 8 OVER FAR SOUTH-EASTERN AT
FIRST. INCREASING 7/8 IN THE VICINITY OF CF, THEN BACKING SOUTH-
WESTERLY 5/6 BEHIND. GUSTS.
SEA : VERY ROUGH TO HIGH. WESTERLY SWELL 3 TO 5 M. CROSSED SEA IN THE
VICINITY OF CF.
VIS : POOR OR VERY POOR IN PRECIPITATION.