WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
29TH OF JULY 2026 AT 17:30 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 292200 TO 302200 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 in the south-west towards the end of the period.
2. DURBAN EAST: S to SW 35 in the south-west spreading to the north-west from
mid-period.
3. MARION FORTIES EAST: W to NW 35 in the south for the first half of the
period.
SYNOPTIC CHART 12:00Z
=====================
High 1040 hPa 41s40e.
Low 1018 hPa 32s12w Low 1020 hPa 29s34e.
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 15 but variable 05 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 10 to 15 in the north, otherwise variable 05 but N
to NW 05 to 10 in the extreme south reaching 15 in the extreme
south-west.
VIS : Good.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Variable 05 in the extreme east for the first half of the period,
otherwise SE 10 to 20.
VIS : Good.
TRISTAN (30S/40S, 00E/20W):
WIND : N to NW 10 to 20 reaching 25 to 30 in the south-west but 35
towards the end of the period.
VIS : Good but moderate to poor in showers and rain in the south-west.
SEA STATE: 3.0m in places reaching 4.0m in the south-west, with W to SW swell
but NW swell in the south-west.
CAPE WEST (30S/40S, 00E/20E):
WIND : Variable 05 in the south for the first half of the period,
otherwise SE to E 10 to 20 reaching 25 in the east but N to NW 10
to 20 in the south-west.
VIS : Good.
SEA STATE: 3.0m in places in the south-east, with S to SE swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : NE to E 15 to 25 in the north-west, otherwise SE to E 15 to 25
reaching 30 over the central and south-eastern parts but variable
05 in the south-west.
VIS : Good in the west, otherwise moderate in showers and rain.
SEA STATE: 3.0 to 3.5m reaching 4.0 to 4.5m over the central and eastern
parts, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : E to NE 10 to 20 but S to SW 20 to 30 in the west reaching 35 in
the south-west spreading to the north-west from mid-period.
VIS : Moderate in showers and thundershowers in places but poor in the
west.
SEA STATE: 3.0m to 3.5m reaching 4.0 to 4.5m in south-west spreading to the
north-west from mid-period, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SW 05 to 15 reaching 20 to 25 in the south-west from mid-
period.
VIS : Good, becoming moderate in showers and rain in the south-west from
mid-period.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 05 to 10 reaching 15 to 20 in the extreme north.
VIS : Moderate in showers over the eastern and southern parts, otherwise
good.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Anticyclonic 05 to 15 in the extreme north, otherwise W to NW 15
to 25 reaching 30 to 35 in the south for the first half of the
period but SW 20 to 30 in the extreme south-west spreading to the
south-east by end of the period. It will become anticyclonic 05 to
10 in the south-west towards the end of the period.
VIS : Good but moderate to poor in showers and rain and snow showers in
the south-west spreading to the central and south-eastern parts by
mid-period.
SEA STATE: 3.0 to 4.0m reaching 5.0 to 7.0m in the south, with W to SW swell.
AREA 2:
=======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA
ACK (AMSTERDAM-CROZET-KERGUELEN)
26/07/29 AT 1600UTC
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 KER.
- GALE FORCE 8 EXPECTED OVER FAR SOUTH-WESTERN CRO AT END.
PART 2: GENERAL SYNOPSIS, 26/07/29 AT 1200UTC
- HIGH PRESSURE AREA OVER WAM AND AMS.
- DISTURBED WESTERLY FLOW OVER SOUTHERN CRO AND KER.
PART 3: FORECAST FOR 24 HOURS FROM 26/07/29 AT 1800UTC TO 26/07/30
AT 1800UTC
WAM (30S/40S, 50E/65E)
SCATTERED SHOWERS.
WIND : VARIABLE 2 A 4, PREVAILING EASTERLY.
SEA : MODERATE OR ROUGH. SOUTH-WESTERLY SWELL 2 M 50 TO 3 M 50.
VISI : MODERATE IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
WIND : ANTICLOCKWISE 2 TO 4.
SEA : ROUGH, BUT LOCALLY VERY ROUGH OVER FAR SOUTHERN. SW SWELL 3 TO
4 M FROM NORTH TO SOUTH.
VISI : MAINLY GOOD.
CRO (40S/50S, 50E/65E)
FRONTAL SHOWERS BY SOUTH-WESTERN AT END.
WIND : WESTERLY 6 TO 7 SETTING-UP SOUTH-WEST 7 TO 8 BY SOUTH-WESTERN
BEHIND THE FRONT AT END. ANTICLOCKWISE 3 TO 5 OVER NORTHERN. GUSTS.
SEA : ROUGH TO HIGH FROM NORTH TO SOUTH. SW SWELL 3 TO 5 M FROM NORTH
TO SOUTH.
VISI : POOR UNDER PRECIPITATION.
KER (40S/50S, 65E/80E)
SCATTERED SHOWERS OVER SOUTHERN.
WIND : WESTERLY TO SOUTH-WEST 7 TO 8, DECREASING 6 TO 7 SOON.
ANTICLOCKWISE 3 TO 5 OVER NORTHERN. SEVERE GUSTS AT BEGINNING.
SEA : VERY ROUGH TO HIGH. SOUTH-WESTERLY SWELL 4 TO 6 M.
VISI : POOR TO VERY POOR IN PRECIPITATION.=