WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
13th OF JULY 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 132200 TO 142200 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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Nil
SYNOPTIC CHART 12:00Z
=====================
High 1023 hPa 25s01e; High 1039 hPa 41s39e.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 10 to 20.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20, but variable 05 to 10 in the extreme east.
VIS : Good.
SEA STATE: 3.0m in the south, with SE swell.
ST HELENA (15S/30S, 00E/20W):
WIND : Variable 05 to 10 in the south-east, otherwise E to SE 10 to 20,
but NW 15 to 25 in the south-west.
VIS : Good, becoming moderate to poor in showers and thundershowers in
the south-west towards the end of the period.
SEA STATE: 3.0 to 3.5m in the south, with SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Variable 05 to 10 in the south-west, otherwise S to SE 10 to 20
reaching 25 to 30 in the north.
but.
VIS : Good.
SEA STATE: 3.0m in the north, with SE swell.
TRISTAN (30S/40S, 00E/20W):
WIND : SW 20 to 30 in the south-east until mid-period, otherwise E to SE
15 to 25 reaching 30 to 35 in the south-west, but NW to W 10 to 20
in the north reaching 25 to 30 in the north-west.
VIS : Good in the north-east, otherwise moderate in showers and rain
but poor in showers and thundershowers in places in the north-
west.
SEA STATE: 3.0 to 4.0m reaching 4.5 to 5.5m in the south-east until towards
the end of the period, with SW swell becoming SE swell in the
south-west towards mid-period.
CAPE WEST (30S/40S, 00E/20E):
WIND : SW 20 to 30 in the south-west drifting to the south-east towards
mid-period, otherwise NW to N 10 to 20 reaching 25 to 30 in the
south-east. It will become variable 05 to 10 in the northern and
western parts towards the end of the period.
VIS : Good in the north, otherwise moderate in showers and rain clearing
in the south-west from mid-period.
SEA STATE: 3.0 to 4.0m except in the north-east reaching 4.5 to 5.5m in the
south-west spreading to the south-central parts by mid-period
while reaching 6.0 to 6.5m, with SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Variable 05 to 10 in the south-east, otherwise E to NE 15 to 25,
becoming NW to W 15 to 25 in the west towards mid-period.
VIS : Good but moderate to poor in showers and thundershowers in places
in the west.
SEA STATE: 3.0 to 4.0m except in the south-east and north-west, with NE to E
swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : NE 15 to 25 in the south-west, otherwise E to SE 20 to 30, but
variable 05 to 10 in the north-west.
VIS : Good but moderate to poor in showers and thundershowers except in
the south-central and south-eastern parts.
SEA STATE: 3.5 to 4.5m, with SE swell.
MOZAMBIQUE CHANNEL:
WIND : S to SW 05 to 15.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 05 to 15 reaching 20 to 25 in the south.
VIS : Good but moderate to poor in showers and rain in the south.
SEA STATE: 3.0 to 4.0m in the south, with SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Anticyclonic 05 to 15 in the north-east, otherwise SW 20 to 30,
but NW to N 15 to 25 in the south-west spreading to the north-west
towards mid-period.
VIS : Good.
SEA STATE: 3.0 to 4.0m except in the north-west spreading to the north-east
from mid-period reaching 4.5 to 5.5m in the south-east at first,
with W to SW swell, becoming NW swell in the south-west towards the
end of the period.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
2026/07/13 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (Wind gusts may be about 40% stronger than the averages given here).
PART 1: WARNING
- Gale running over AMS.
- Gale expected over CRO and KER.
PART 2: GENERAL SYNOPSIS, 26/07/13 AT 0000UTC
- Low 993 hPa near 46S/76E moving rapidly southeastward with cold front axis 33S/50E, 38S/65E, 46S/76E.
- Cold front over AMS moving eastward slowly.
PART 3: FORECAST FOR 24 HOURS FROM 26/07/13 at 0600UTC to 26/07/14 at 0600UTC
WAM (30S/40S, 50E/65E)
Scattered showers.
WIND : Southerly 5 to 6, occasionally 7, shifting to 3/4 from western area.
SEA : Rough to very rough. Southwest swell 3 to 4 m.
VIS : Poor during precipitation.
AMS (30S/40S, 65E/80E)
Rain and frontal showers.
WIND : North-westerly 4 to 6, occasionally 7/8 under the front, veering
south-westerly 5 to 6, occasionally 7 behind the front, easing to
southerly 3/4 over the western area towards the end of the period.
Gusts.
SEA : Rough to very rough. South-westerly swell 3 to 4 m.
VIS : Poor during rainfall.
CRO (40S/50S, 50E/65E)
Scattered showers becoming less frequent by western area.
WIND : South-westerly, force 5 to 6, occasionally 7 and reaching 8 at times
in the far south. Gusts.
SEA : Moderate to rough, locally very rough. South-westerly swell, 2 to 4
m.
VIS : Poor during rainfall.
KER (40S/50S, 65E/80E)
Rain and frontal showers with CF over north-eastern.
WIND : north-westerly 5 to 6, locally 7, ahead of the front, then south-
westerly 5 to 6 behind it, subsequently freshening to 6 to 7, locally
8 over far southern. Strong gusts.
SEA : rough to very rough. Westerly swell 2 to 4 m.
VIS : poor during rainfall.