WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
25th OF JULY 2026 AT 16:00 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:
=======
FORECAST VALID FROM 252200 TO 262200 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. DURBAN EAST: S to SE 35 in the central parts until mid-period.
2. MARION FORTIES EAST: W to SW 35, reaching 40 to 45 in the south-east at
first, becoming NW to W 35 to 40 over the central and
western parts during the second half of the period.
SYNOPTIC CHART 12:00Z
=====================
High 1028 hPa 40s30w, High 1030 hPa 31s31e.
Low 972 hPa 56s42e, Low 1012 hPa 31s49e, Low 1012 hPa 46s10e.
1. Cold Front: 31s20w 35s11w 40s01e into 46s10e.
2. Cold Front: 36s26e 41s43e 46s49e 51s48e into 56s42e.
3. Cold Front: 24s50e 30s52e into 31s49e.
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 15 to 20, variable 05 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 15 to 20.
VIS : Good.
TRADES (15S/30S, 00E/WEST COAST):
WIND : N to NE 10 to 15 in the north-east, otherwise SE 10 to 20,
reaching 25 over the southern parts.
VIS : Good.
SEA STATE: 3.0m in the south, with S swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Anticyclonic 05 to 15, reaching 20 in the north-east.
VIS : Good but moderate in showers and rain in the east and south-east
at first.
SEA STATE: 3.0 to 3.5m, except in the north-east, with S to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : SE 15 to 25 in the east and north-east but W to NW 15 to 25 in the
southern parts where it will become S to SE 15 to 25 during the
second half of the period.
VIS : Good but moderate in showers and rain in the central south and the
south-east.
SEA STATE: 3.0 to 3.5m, except in the northern parts, 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 where it will become anticyclonic
during the second half of the period.
VIS : Good but moderate in showers and thundershowers over the extreme
south-west.
SEA STATE: 3.0 to 4.0m reaching 5.0 to 6.0m over the north-eastern parts,
at first, with S to SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Anticyclonic in the south-west, 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 5.0 to 6.0m over the central and the eastern
parts, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 15 to 25.
VIS : Good but moderate in showers and rain in places.
SEA STATE: 3.0 to 4.0m in the southern parts, with SW 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, otherwise good.
SEA STATE: 3.5 to 4.0m in the extreme south, with SW swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to SW 25 to 35, reaching 40 to 45 in the south-east at first,
becoming NW to W 20 to 30, reaching 35 to 40 over the central and
western parts during the second half of the period.
VIS : Good but moderate in showers in the west, spreading to the eastern
parts during the second half of the period.
SEA STATE: 4.0 to 6.0m, reaching 8.0 to 10m in the south-east at first, with
W to SW swell.
AREA 2:
=======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA
ACK (AMSTERDAM-CROZET-KERGUELEN)
26/07/25 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 CRO.
PART 2: GENERAL SYNOPSIS, 26/07/25 AT 1200UTC
- THUNDERY LOW 1009 NEAR 30S/51E, SLOWLY MOVING EASTWARD. EXPECTED
1014 NEAR 31S/58E AT END.
- COLD FRONT EXTENDING FROM SOUTH-WESTERN WAM TO SOUTH-WESTERN KER
AND MOVING ACROSS CRO TO EASTWARD.
- SECOND COLD FRONT REACHING WESTERN CRO AT FIRST AND MOVING
SOUTH-EASTWARD.
- HIGH 1037 NEAR 40S/82E, SLOWLY MOVING EASTWARD.
PART 3: FORECAST FOR 24 HOURS FROM 26/07/25 AT 1800UTC TO 26/07/26
AT 1800UTC
WAM (30S/40S, 50E/65E)
RAIN OR SHOWERS, BECOMING LOCALLY THUNDERY IN NORTH.
WIND: N 5 OR 6, BECOMING CLOCKWISE 4 TO 6 AT TIMES 7 IN NORTH. GUSTS.
SE 5 OVER SOUTH-WESTERN LATER THEN VARIABLE 2 TO 3 AT THE END.
SEA: MODERATE OR ROUGH, BECOMING ROUGH OR VERY ROUGH LATER IN WEST BY
SW SWELL 3 TO 4 M.
VISI: POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SCATTERED SHOWERS.
WIND: ANTICLOCKWISE 3 TO 5 WITH NW 4 TO 5 OVER SOUTH-WESTERN LATER.
SEA: MODERATE OR ROUGH.
VISI: MODERATE IN PRECIPITATION.
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 SOON OVER SOUTHERN AND ANTICLOCKWISE 3 TO 5 OVER NORTHENR.
SEVERE GUSTS.
SEA: ROUGH OR VERY ROUGH, BECOMING HIGH TO VERY HIGH BY SOUTH-WESTERN
AT FIRST. SW SWELL 4 TO 5 M INCREASING 6 TO 7 M BY SOUTH-WESTERN
SOON.
VISI: 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 BY WESTERN BEHIND THE FRONT
LATER. SEVERE GUSTS. LOCALLY ANTICLOCKWISE 3 TO 4 OVER FAR NORTHERN.
SEA: ROUGH TO VERY ROUGH. W SWELL 4 TO 5 M.
VISI: POOR TO VERY POOR IN PRECIPITATION.=