WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
26th 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 : SW to W 35 in the central southern parts from mid-period.
2. DURBAN EAST: S to SE 35 over the central parts until mid-period.
3. MARION FORTIES EAST: W to SW 35 in the south-west, spreading to the
central east by mid-period, but NW to W 35 to
40 over the central and eastern parts moderating
after mid-period.
SYNOPTIC CHART 06:00Z
=====================
High 1032 hPa 38s17w, High 1030 hPa 40s46e.
Low 976 hPa 58s09e, Low 1002 hPa 47s34e, Low 1013 hPa 29s55e.
1. Cold Front: 44s01w 46s01e 54s06e 53s09e into 58s09e
2. Cold Front: 41s19e 43s26e 44s31e into 47s34e.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 10 to 20, but variable 05 in the south-west.
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, but variable 05 to 10 in the north-west.
VIS : Good.
TRADES (15S/30S, 00E/WEST COAST):
WIND : N to NW 05 to 15 in the north-east at first, otherwise SE 15 to
25.
VIS : Good.
SEA STATE: 3.0m in the central south, with S swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Anticyclonic 05 to 15, but E 20 to 25 in the north.
VIS : Good but moderate in showers and rain in the south-west, but in
the south-east at first
SEA STATE: 3.0 to 3.5m in the south, with S to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : S to SW 15 to 25, reaching 30 in places in the south-west, but
variable in the north-east until mid-period.
VIS : Good but moderate in showers and rain in the south-east.
SEA STATE: 3.0 to 4.0m, reaching 4.5m in the south-east, with SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NW 15 to 25 in the western half and the south-east, but S to
SE 20 to 30 in the north-east at first, becoming anticyclonic 05
to 10, but SW to W 15 to 25 in the south-west, reaching 30 to 35
in the central south from mid-period.
VIS : Good but moderate in showers and thundershowers over in the
central south and the north-west.
SEA STATE: 3.0 to 4.0m reaching 4.5m over the north-eastern at first, with SW
swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Anticyclonic in the south-west, spreading to the south-east by
mid-period, otherwise S to SE 15 to 25, reaching 30 to 35 in the
central parts until mid-period.
VIS : Good but moderate in showers in places over the eastern half.
SEA STATE: 3.0 to 4.0m, reaching 5.5 to 6.5m over the central and the eastern
parts, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 15 to 25, but variable 05 to 10 in the north-east.
VIS : Good but moderate in showers and rain in places in the south.
SEA STATE: 3.0 to 4.0m in the south, reaching 4.5m in the south-east
subsiding from mid-period, 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 at first,
otherwise good.
SEA STATE: 3.5 to 4.5m in the southern-half, with SW swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to SW 25 to 35 in the south-west, spreading to the central east
by mid-period, otherwise NW to W 20 to 30, reaching 35 to 40 over
the central and eastern parts moderating after mid-period.
VIS : Good in the north-east at first, otherwise moderate in showers.
SEA STATE: 4.0 to 6.0m, reaching 8.0 to 10.0m in the south, spreading to the
south-east towards 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)
26/07/26 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 CRO AND EXPECTED OVER KER.
PART 2: GENERAL SYNOPSIS, 26/07/26 AT 0000UTC
- FILLING LOW WITH THUNDERSTORM 1009 HPA OVER NORTHERN WAM.
- COLD FRONT OVER CRO CROSSING CRO AND KER DURING THE PERIOD.
- COLD FRONT AXIS 49S/18E, 43S/25E, 48S/30E EXPECTED OVER CRO AT
END.
PART 3: FORECAST FOR 24 HOURS FROM 26/07/26 AT 0600UTC TO 26/07/27 AT
0600UTC
WAM (30S/40S, 50E/65E)
SHOWERS AND RAIN. SQUALLS OVER NORTHERN.
WIND: CLOCKWISE 4 TO 6, AT TIMES 7 OVER NORTHERN AREA AT FIRST. OVER
SOUTHERN. NW 4 TO 6 AHEAD THE FRONT BACKING S 5 TO 6 BEHIND. LATER,
BECOMING ANTICLOCKWISE 2 TO 4 , AT TIMES 5 BY WESTERN AREA. GUSTS.
SEA : ROUGH OR VERY ROUGH. SW SWELL 3 TO 4 M.
VIS : POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SCATTERED SHOWERS.
WIND: ANTICLOCKWISE OR VARIABLE 2 A 4 AT TIMES 5.
SEA : ROUGH. SW SWELL 2 TO 3 M.
VIS : GOOD.
CRO (40S/50S, 50E/65E)
RAIN OR FRONTAL SHOWERS.
WIND: NW 6 OR 7 AHEAD OF THE FRONT BACKING WESTERLY 6 TO 7 AT TIMES 8
BY WESTERN OVER SOUTHERN AND DECREASING ANTICLOCKWISE 3 TO 5 OVER
NORTHERN. LATER, INCREASING NW 6 TO 7 AT TIMES 8 AHEAD THE FRONT
BACKING SW 6 TO 7 BEHIND. SEVERE GUSTS.
SEA : VERY ROUGH TO HIGH LOCALLY VERY HIGH BY SOUTHERN AT FIRST. SW
SWELL 4 TO 6 M.
VIS : POOR TO VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
RAIN AND FRONTAL SHOWERS.
WIND: NW 6 TO 7, BACKING WESTERLY 6 TO 7 AT TIMES 8 OVER SOUTHERN
AREA AND DECREASING ANTICLOCKWISE TEMPORARILY 3 TO 5 OVER NORTHERN
LATER. SEVERE GUSTS.
SEA : ROUGH TO VERY ROUGH. HIGH OVER SOUTHWESTERN AT END. W SWELL 4
TO 5 M , INCREASING 6M OVER SOUTHWESTERN AREA AT END.
VIS : POOR TO VERY POOR IN PRECIPITATION.=