WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
28TH 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 281000 TO 291000 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:
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1. DURBAN EAST: E to SE 35 in the west.
2. MARION FORTIES EAST: W to NW 35 in the south.
SYNOPTIC CHART 06:00Z
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High 1035 hPa 40s21e
Low 1010 hPa 34s18w, Low 966 hPa 55s06w, Low 989 hPa 48s65e
1. Cold Front: 21s26w 25s21w 30s18w into 34s18w
2. Cold Front: 36s17w 40s13w 45s08w into 55s06w
3. Cold Front: 36s38e 40s49e 45s61e into 48s65e
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 05 to 15, variable 05 to 10 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : SE to E 05 to 15 in the north, otherwise NE 10 to 20 but NW to N
10 to 20 in the south-west, where it will become S to SW 05 to 15
towards the end of the period.
VIS : Good but moderate in showers and rain in the south.
SEA STATE: 3.0m in the south-east until towards mid-period, with SE swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Variable 05 to 10 in the extreme east, otherwise SE to E 10 to 20
reaching 25 to 30 in the south-east until mid-period.
VIS : Good.
SEA STATE: 3.0 to 4.0m, except in the extreme north, reaching 4.5m in the
south-east at first, with S to SE swell.
TRISTAN (30S/40S, 00E/20W):
WIND : SW 15 to 25 in the south-west until mid-period, otherwise N to NW
10 to 20 reaching 25 to 30 in the south-east until mid-period,
but cyclonic 15 to 25 in the north-west.
VIS : Moderate in showers and rain, becoming good from the west towards
mid-period.
SEA STATE: 3.0 to 4.0m in the south-west, with W to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : NE 10 to 20 in the north-west and south-east, otherwise SE to E
15 to 25 reaching 30 in the east but N to NW 15 to 25 in the
south-west.
VIS : Good, becoming moderate in showers and rain in the south-west
towards the end of the period.
SEA STATE: 3.0 to 4.0m in the east and north-east, with S to SE swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Variable 05 to 10 in the north-east, otherwise SE 15 to 25
reaching 30 in the central and south-eastern parts. It will
become E to NE 20 to 30 in the west towards mid-period.
VIS : Good but moderate in showers and rain in the north and east,
spreading to the south towards the end of the period.
SEA STATE: 3.0 to 4.0m reaching 4.5m in the north, with SW swell but with S
to SE swell in the north-west.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : S to SW 10 to 20 in the north-west at first, otherwise E to SE 10
to 20 reaching 25 to 35 in the west.
VIS : Moderate to poor in showers and thundershowers in places.
SEA STATE: 4.0 to 5.0m in the west but 3.0 to 3.5m in the east at first,
with S to SE swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 05 to 15 but variable 05 to 10 over the central parts.
VIS : Good but moderate in showers and rain in places over the southern
parts.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : S to SE 10 to 20 but variable 05 to 10 in the south.
VIS : Moderate in showers and rain in places.
SEA STATE: 3.0m in the south-east until mid-period, with S to SW swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : S to SE 10 to 20 in the north, otherwise W to NW 15 to 25
reaching 30 to 35 in the south.
VIS : Good but moderate in showers and rain in the south until mid-
period.
SEA STATE: 3.0 to 4.0m reaching 5.0 to 6.0m in the south, 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)
2026/07/28 AT 0400UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- STONG GALE OVER CRO AT FIRST.
- VIOLENT STORM OVER KER.
PART 2: GENERAL SYNOPSIS, 2026/07/28 AT 0000UTC
- HIGH 1029 HPA NEAR 35S/70E, EXTENDING WESTWARDS BY A RIDGE.
- LOW 994 HPA NEAR 47S/56E DEEPENING, EXPECTED 978 HPA NEAR 49S/817E ON THE
28TH AT 18 UTC, WITH A DISTURBED SYSTEM INCLUDING COLD FRONT AXIS 38S/45E,
45S/56E AND 48S/62E.
PART 3: FORECAST FOR 24 HOURS FROM 2026/07/28 AT 0600UTC TO 2026/07/29 AT
0600UTC
WAM (30S/40S, 50E/65E)
FRONTAL SHOWERS AND RAIN OVER SOUTHERN.
WIND: VARIABLE 2 TO 4 VEERING NW 5 OVER SOUTHERN VEERING SE 5 OVER SOUTH-
WESTERN AT THE END BEHIND THE FRONT.
SEA : ROUGH BECOMING MODERATE BY NORTH-WESTERN. SW SWELL 2 TO 3 M
VIS : POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
FEW SHOWERS.
WIND: VARIABLE ANTICLOCKWISE 2/4, SETTING UP W 5 TO 6 TO THE SOUTH.
SEA : ROUGH TO LLOCALLY VERY ROUGH IN THE SOUTH. SW SWELL 2 TO 3M.
VIS : GOOD.
CRO (40S/50S, 50E/65E)
RAIN AND FRONTAL SHOWERS.
WIND: NW 6 TO 7 LOCALLY 8, BACKINGS TO SW 6 TO 7 LOCALLY 8 TO 9 NEAR THE LOW
DECREASING 5 TO 6 BY WESTERN AT FIRST. SEVERE GUSTS. BECOMING W 6 TO 8
OVER SOUTHERN LATER AND VARIABLE 3 TO 4 OVER NORTHERN.
SEA : ROUGH TO HIGH FROM NORTH TO SOUTH, WESTERLY SWELL 2 TO 4M.
VIS : POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
HEAVY RAIN AND FRONTAL SHOWERS.
WIND: CLOCKWISE 8/9 LOCALLY 10/11 NEAR THE LOW WITH VIOLENT GUSTS. SETTING
UP W 6 TO 7 LOCALLY 8 IN SOUTH AND VARIABLE 3 TO 4 IN NORTH.
SEA : VERY ROUGH TO HIGH LOCALLY VERY HIGH, WESTERLY SWELL 4 TO 7 M.
VIS : VERY POOR IN PRECIPITATION.