WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
17TH OF JUNE 2026 AT 08:30 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 171000 TO 181000 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 by mid-period.
2. MARION FORTIES EAST: W to NW 35 over the north-west towards the end
of the period.
SYNOPTIC CHART 06:00Z
=====================
High 1032 hPa 33s02e, High 1028 hPa 32s67e
Low 992 hPa 53s06e, Low 996 hPa 48s46e, Low 1008 hPa 38s53e
1. Cold Front: 28s50e 332s56e 37s58e into 38s53e.
2. Cold Front: 42s33e 43s36e 46s46e into 48s47e.
2. Cold Front: 37s11w 44s07e 51s17e into 53s06e.
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 4.0m central, west and southern parts, 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, reaching 30 in places in the north-east at times.
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 central and south-eastern
parts.
VIS : Good, but moderate in thundershowers in the south-east.
SEA STATE: 3.0 to 4.0m in the south-east, central and northern parts,
with SE swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Anticyclonic 05 to 15 in the east, otherwise N to NW 15
to 25, reaching 30 to 40 in the west and south-west by mid-
period.
VIS : Good, but moderate to poor in showers and thundershowers in
the west and southern parts.
SEA STATE: 3.0 to 4.0m in the south and west, reaching 4.5 to 5.0m in the
south-west during the second half of the period, with N to NW
swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : W to NW 15 to 25 in the south and south-west, but anti-
cyclonic 05 to 15 in the west, otherwise S to SE 15 to 25.
VIS : Good, but moderate in showers and thundershowers in places in
the north-east, but moderate in showers and rain in the
extreme south-west.
SEA STATE: 3.0 to 4.0m in the south, north and north-east, with SE swell,
but SW in the south.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to SW 10 to 20, reaching 25 to 30 in the east at first and
over the central south from mid-period.
VIS : Good, but moderate in showers and rain in places.
SEA STATE: 3.5 to 4.5m, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Anti-cyclonic 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 to 30 in the extreme north-west.
VIS : Moderate in light showers and rain in places.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to SW 15 to 25 confining to the extreme north-east, while
becoming W to NW 10 to 20 during the second half of the
period, reaching 30 to 35 over the north-west towards the end
of the period.
VIS : Good, but moderate in showers and rain in the southern half,
spreading to the north from the morning.
SEA STATE: 3.5 to 4.5m, reaching 5.0 to 6.5m in places in the west and
southern half, spreading to the north from mid-period, while
subsiding in the south-west, 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.