WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
30TH 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:
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FORECAST VALID FROM 302200 TO 312200 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. TRISTAN: Cyclonic 35 to 45 in the south-west by mid-period, where it will
reach 50 to 55 towards the end of the period.
2. DURBAN EAST: S to SW 35 to 40 in the north-west and in places in the
south-central until mid-period.
SYNOPTIC CHART 12:00Z
=====================
High 1034 hPa 49s28e.
Low 1002 hPa 35s32w, Low 1020 hPa 32s37e, Low 954 hPa 62s47e
1. Cold front: 26s34w 30s30w 33s30w into 35s32w
2. Cold front: 44s32e 48s44e 53s56e 60s61e into 62s47e
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 to 10 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 05 to 15, but N to NW 05 to 15 in the south-west,
spreading to the central-south, reaching 20 to 25 in the extreme
south-west towards mid-period. it will become W to SW 10 to 20 in
the extreme towards the end of the period.
VIS : Good, becoming moderate to poor in showers and thundershowers in
the south-west towards mid-period.
TRADES (15S/30S, 00E/WEST COAST):
WIND : E to SE 10 to 20, it will become variable 05 to 10 in the extreme
East and south-west after mid-period.
VIS : Good.
TRISTAN (30S/40S, 00E/20W):
WIND : N to NW 15 to 25, becoming cyclonic 35 to 45 in the south-west
by mid-period, where it will reach 50 to 55 towards the end of the
period. It will become W to SW 10 to 20 in the west but SE 15 to
25 in the extreme south-west by the end of the period.
VIS : Good but moderate to poor in showers and thundershowers in the
west across the central to the south-west.
SEA STATE: 3.0 to 4.0m, except in the north-east, reaching 4.5 to 5.5m in the
south-west towards mid-period, with S to SW swell in the extreme
south-west but W to NW over the central and south-central.
CAPE WEST (30S/40S, 00E/20E):
WIND : N to NW 10 to 20 in the south-west, reaching 25 in the extreme
south-west, otherwise E to SE 10 to 20, reaching 25 in the east
until mid-period but variable 05 to 10 in the central. It will
become NE 15 to 25 in the south-east towards the end of the
period.
VIS : Good.
SEA STATE: 3.0m in places in the east and south-west, with S to SE swell but
W to NW swell over the south-west.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : NE to E 15 to 25 in the west and north-east, otherwise S to SE 15
to 25 reaching 30 to 40 over the central and south-eastern parts
but variable 05 to 10 in the south-central.
VIS : Good in the west, otherwise moderate to poor in showers and rain.
SEA STATE: 3.0 to 4.0m, reaching 4.0 to 5.0m over the central and eastern
parts, with S to SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : S to SW 20 to 30 in the west reaching 35 to 40 in the north-west
and in places in the south-central until mid-period, but cyclonic
05 to 15 over the central, otherwise E to NE 10 to 20. It will
become E to SE 10 to 20 in the extreme south-west by the end of
the period.
VIS : Moderate in showers and thundershowers except in the south-east.
It will start to clear in the south-west by the end of the period.
SEA STATE: 3.0m to 4.0m except in the east, while reaching 4.5 to 5.0m in
west, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SW 10 to 20 reaching 25 to 30 in the south-west by mid-
period.
VIS : Good, but moderate in showers and rain in the south-west,
spreading to the central towards mid-period.
SEA STATE: 3.0 to 4.0m in the south-west, spreading to the central towards
mid-period, with S to SW swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 05 to 15, but N to NE 05 to 15 in the south.
VIS : Moderate in showers and rain in southern parts, otherwise
good.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : S to SW 15 to 25 in the south-east until mid-period, reaching 30
at first, otherwise anticyclonic 05 to 15, spreading to the
central by mid-period. It will become W to NW 15 to 25 in the
south-west towards mid-period, spreading over the south after mid-
period, reaching 30 to 35 in places in the south after mid-period.
VIS : Good but moderate to poor in showers and rain over the west across
the central to the south-east at first.
SEA STATE: 3.0 to 4.0m reaching 5.0 to 7.0m in the south, 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)
26/07/30 AT 1600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (Wind gusts may be about 40% stronger than the averages given here).
PART 1: WARNING
- Strong gale force 9 over Southern CRO area and Southern Ker area.
PART 2: GENERAL SYNOPSIS, 26/07/30 AT 1200UTC
- High 1034 hPa near 39S/64E.
- Low 957 hPa near 61S/49E with cold front CF associated and axis 45S/40E, 49S/50E, 52S/57E, 55S/71E moving Eastward 15/20kt.
PART 3: FORECAST FOR 24 HOURS FROM 26/07/30 at 1800UTC to 26/07/31 at 1800UTC
WAM (30S/40S, 50E/65E)
Showers then frontal rain and showers under CF over Southern area.
WIND : NE 3 to 5 over Northern area increasing Est 6 to 7 over Southern
area.
SEA : Moderate to rough. SW swell 2 to 3 meters.
VIS : Poor in precipitation.
AMS (30S/40S, 65E/80E)
Scattered showers.
WIND : Anticlockwise 2 to 4.
SEA : Rough, locally very rough over far South-Eastern area. SW swell 3
to 4 meters from North to South.
VIS : Poor in precipitation.
CRO (40S/50S, 50E/65E)
Showers then frontal rain and showers under CF.
WIND : W to SW 6 over Southern area locally 8 to 9 behind CF. Gusts.
SEA : Rough to very rough but high over Southern area. SW swell 4 to 6
meters from North to South.
VIS : Poor in precipitation.
KER (40S/50S, 65E/80E)
Frontal rain and showers under CF
WIND : W 5 to 6 at times 7 over Southern area ahead CF then SW 7 to 8
locally 9 behind CF. Gusts.
SEA : Rough to very rough. SW swell 3 to 5 meters.
VIS : Poor in precipitation.