WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
25th OF JULY 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 251000 TO 261000 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. CAPE EAST : S to SE 35 in the north-east until mid-period.
2. DURBAN EAST: Cyclonic 35 over the eastern half, moderating during the
second half of the period.
3. MARION FORTIES EAST: NW 35 in the east and south-east at first, and W to
SW 35 to 40 in southern half, becoming NW 35 to 40 in
the west during the second half of the period.
SYNOPTIC CHART 06:00Z
=====================
High 1028 hPa 40s28w, High 1030 hPa 34s06e, High 1036 hPa 40s73e.
Low 972 hPa 56s39e, Low 1012 hPa 32s47e, Low 1016 hPa 40s10w.
1. Cold Front: 29s29w 36s16w into 40s10w.
2. Cold Front: 37s25e 40s38e 45s43e 50s45e into 56s39e.
3. Cold Front: 22s45e 27s50e into 32s47e.
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 10 to 20.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 15 to 20, variable 05 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 15 to 20.
VIS : Good.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Variable 05 to 10 in the north-east, otherwise SE 10 to 20,
reaching 25 over the central parts.
VIS : Good.
SEA STATE: 3.0 to 3.5m in the south, with S swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Anticyclonic 05 to 15 in the north-east, and NW 15 to 25 in the
east and south-east at first, otherwise S to SE 15 to 25.
VIS : Good but moderate in showers and rain across the north-west,
central parts and the south-east, but only in the eastern half
during the second half of the period.
SEA STATE: 3.0 to 3.5m, except in the north-east, with S to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : NW 15 to 25 reaching 30 in the west and southern parts, but SE 15
to 25 in the east and north-east.
VIS : Good but moderate in showers and rain in the south-west.
SEA STATE: 3.0 to 3.5m, except in the north-west, with SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : NE 10 to 15 in the north-west but S to SE 20 to 30 in the northern
parts, reaching 35 in the north-east until mid-period, elsewhere,
W to SW 15 to 25.
VIS : Good but moderate to poor in showers and thundershowers in the
north-east and south-west during the first half of the period.
SEA STATE: 3.0 to 4.0m reaching 5.0 to 6.0m over the north and north-eastern
parts, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : S to SE 10 to 20, but cyclonic 25 to 35 over the eastern half,
moderating during the second half of the period.
VIS : Good but moderate to poor in showers and thundershowers over the
eastern half, clearing towards the end of the period.
SEA STATE: 3.0 to 4.0m, reaching 5.0 to 6.5m over the central parts,
spreading to the east by mid-period, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 15 to 25.
VIS : Good but moderate in showers and rain in places.
SEA STATE: 3.0 to 4.0m in the south, reaching 4.5m in the south-east, with S
swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : S to SE 10 to 20, but W to SW 15 to 25 in the south.
VIS : Moderate in showers and rain in the extreme south, otherwise good.
SEA STATE: 3.5 to 4.5m in the extreme south, with SW swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : NW 20 to 30 in the north-east at first, otherwise W to SW 25 to
35, reaching 40 in the southern parts during the first half of the
period. It will become NW 20 to 30, reaching 35 to 40 in the west
during the second half of the period.
VIS : Good but moderate showers in the north-east at first, becoming
poor in snow-showers in the south by mid-period.
SEA STATE: 4.0 to 6.0m in the northern parts, elsewhere 7.0 to 9.0m while
reaching 10m in the central south, spreading to the south-east
by 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)
26/07/25 AT 0600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE FORCE 8 EXPECTED AT END OVER CRO.
PART 2: GENERAL SYNOPSIS, 26/07/25 AT 0000UTC
- THUNDERY LOW 1005 NEAR 33S/47E, SLOWLY MOVING EASTWARDS AND DEEPENING A LITTLE. EXPECTED 1010 NEAR 31S/55E AT END.
- LOW 1008 NEAR 50S/59E, MOVING SOUTHEASTWARDS AND DEEPENING.
- COLD FRONT MOVING ACROSS CRO AND THEN WESTWARDS THROUGH KER DURING THE PERIOD.
- HIGH 1037 NEAR 41S/79E, SLOWLY MOVING EASTWARDS.
PART 3: FORECAST FOR 24 HOURS FROM 26/07/25 AT 0600UTC TO 26/07/26 AT 0600UTC
WAM (30S/40S, 50E/65E)
RAIN OR SHOWERS, BECOMING LOCALLY THUNDERY IN NORTH.
WIND: NORTH 5 OR 6, BECOMING CLOCKWISE 4 TO 6 AT TIMES 7 IN NORTH. GUSTS.
SOUTH-EAST 5 OVER SOUTH-WESTERN AT END.
SEA : MODERATE OR ROUGH, BECOMING ROUGH OR VERY ROUGH LATER IN SOUTHWEST BY
SOUTH-WEST SWELL 3 TO 4 M.
VIS : POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SCATTERED SHOWERS.
WIND: ANTICLOCKWISE 3 TO 5 WITH NORTH-WEST 4 TO 5 OVER SOUTH-WESTERN AT END.
SEA : MODERATE OR ROUGH.
VIS : MODERATE IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
RAIN OR FRONTAL SHOWERS.
WIND: NORTHWEST 6 OR 7 BUT OCCASIONALLY CLOCKWISE 6 IN SOUTHWEST. WESTERLY 7
TO 8 BY WESTERN SOON. SEVERE GUSTS.
SEA : ROUGH OR VERY ROUGH, BECOMING HIGH TO VERY HIGH BY SOUTH-WESTERN AT
END. SOUTH-WETS SWELL 4 TO 5 M INCREASING 6 TO 7 M BY SOUTH-WESTERN AT
END.
VIS : POOR TO VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
FRONTAL SHOWERS.
WIND : NORTH-WEST 6 TO 7, BACKING WESTERLY 6 TO 7 BY WESTERN BEHIND THE FRONT
AT END. GUSTS. LOCALLY ANTICLOCKWISE 3 TO 4 OVER FAR NORTHERN.
SEA : ROUGH TO VERY ROUGH. WEST SWELL 4 TO 5 M LATER.
VIS : POOR TO VERY POOR IN PRECIPITATION.