WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
27th OF JULY 2026 AT 13:30 UTC.
FOR SOUTH-EAST SECTOR OF METAREA. VII, PREPARED BY REUNION, SEE AREA 2
BELOW.
NOTE: WX OBSERVATIONS.
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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 272200 TO 282200 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. MARION FORTIES EAST: SW to W 35 in the north-east at first as well as in
places in the south.
SYNOPTIC CHART 12:00Z
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High 1034 hPa 37s02e, High 1026 hPa 36s56e.
1. Cold Front: 34s22e 36s29e 40s36e 43s43e into 44s42e.
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 05 to 15.
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 : Anticyclonic 05 to 15 in the north spreading to the central parts
from mid-period, otherwise NE to E 15 to 20, but NW to N 10 to 20
in the south-west.
VIS : Good but moderate in showers and rain in the south-west drifting
to the south-east by mid-period.
SEA STATE: 3.0m in the south-east until towards the end of the period, SE
swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : SE to E 15 to 25 reaching 30 in the south-east until mid-period.
VIS : Good but moderate to poor in showers and thundershowers in the
western and central parts spreading to the east from mid-period
while clearing from the west.
SEA STATE: 3.0 to 4.0m except in the extreme north reaching 4.5m in the
south-east towards mid-period, with SE swell.
TRISTAN (30S/40S, 00E/20W):
WIND : N to NW 15 to 25 reaching 30 in the south, becoming SW to S 05 to
15 in the west from mid-period.
VIS : Good but moderate in showers and rain in the south-west spreading
to the north-west and central parts by mid-period.
SEA STATE: 3.0 to 3.5m in the east at first and south reaching 4.0 to 4.5m in
the south-west towards the end of the period , with S to SW swell
but NW in the south.
CAPE WEST (30S/40S, 00E/20E):
WIND : SE to S 20 to 30 in the north-east, otherwise anticyclonic 05 to
15, becoming NW 15 to 25 in the extreme south-west towards the end
of the period.
VIS : Good.
SEA STATE: 3.0 to 4.0m reaching 4.5m in the north-east while subsiding in the
west towards mid-period, with SW swell but SE in the north.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : NW to N 15 to 25 in the east, otherwise SW to S 20 to 30 in the
central parts spreading to the east from mid-period becoming
anticyclonic 05 to 15 in the west from mid-period.
VIS : Good but moderate in showers and rain in the extreme north-
western and north-central parts as well as in the east.
SEA STATE: 3.0 to 4.0m reaching 4.5 to 5.0m in places in the south-central
parts at first, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : SE to S 20 to 30 in south-west, otherwise E to NE 10 to 20 but
variable 05 to 10 in the south-east and north-west.
VIS : Good but moderate to poor in showers and thundershowers in the
western and central parts.
SEA STATE: 3.0 to 4.0m in the east until mid-period, becoming 4.5 to 5.0m in
the south-west from mid-period, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 05 to 15.
VIS : Good but moderate in showers and rain in places in the south.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : Variable 5 to 10 in the south, otherwise S to SE 10 to 20.
VIS : Good but moderate in showers and rain in places in the south-west
and north-east.
SEA STATE: 3.0m in the extreme south, with SW swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : SW to W 15 to 25 reaching 30 to 35 in the north-east at first
and in the south.
VIS : Good but moderate in showers and rain in the north-east at first.
SEA STATE: 4.0 to 5.0m, reaching 5.5 to 6.5m in the south-west, spreading to
the south-east towards mid-period, with SW to W swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
2026/07/27 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 over CRO and KER
- Locally strong Gale force 9 over CRO.
PART 2: GENERAL SYNOPSIS, 26/07/27 AT 0000UTC
- Cold front (CF) leaving east Ker at first
- CG front axis 44S/50E, 46S/53E, 49S/53E, with low 995 hPa near 48S/54E moving eastwards
- Front CH arriving later over CRO with a deepening low, expected 987 hPa near 49S/64ZE at end .
PART 3: FORECAST FOR 24 HOURS FROM 26/07/27 at 0600UTC to 26/07/28 at 0600UTC
WAM (30S/40S, 50E/65E)
Showers, locally squalls in the far north-east.
WIND: Northern half: Easterly to South-easterly 4/5, locally 6, becoming
variable 2/4 later. Southern half: variable anticlockwise 2/4,
increasing North-Westerly 5/6 in the south later.
SEA: Rough, locally very rough in the south. South-westerly swell 3 to 4 m.
VIS: Poor in precipitation.
AMS (30S/40S, 65E/80E)
Showers, locally squalls in the far north-west
WIND: Variable anticlockwise 2/4, but Southerly 4/5 in the north-east and
North-Easterly 5/6 in the north-west.
SEA: rough, locally very rough in the south. Arrival of South-Westerly swell
3/4m in south-west.
VIS: poor in precipitation.
CRO (40S/50S, 50E/65E)
Rain and frontal showers, CG then CH. violent gusts
WIND: North-westerly 7/8 ahead og CG, locally 5/6 in the north, backing
Westerly to South-Westerly 7/8 then 4/6 in the south then later
becoming with CH clockwise 7/8 locally 9 in the northern semicircle and
5/7 in the southern semicircle of the low.
SEA: very rough to high.Southwesterly then west swell 4/7m, abating, then
West to North-West 3/4m at the end.
VIS: very poor in precipitation.
KER (40S/50S, 65E/80E)
Rain and frontal showers,CG then CH.violent gusts
WIND: West to North-West 6/7 in the north and 7/8 in the south ahead of the
CG, backing West 6/7 behind , locally 8 in the south, then decreasing
temporarily 3/5,. At end in the western half increasing North-Westerly
7/8 with North-Easterly 6/7 in the far south. But at firts variable 2/4
in the north and Westerly 5/6 in the south.
SEA: very rough to high temporarily rough in the north-east. South-westerly
swell 4/7m.
VIS: very poor in precipitation.