WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
23RD OF JUNE 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 232200 TO 242200 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. ST HELENA: SE to S 35 in the extreme south-east.
2. CAPE EAST: NW to W 35 in the west at times until mid-period.
3. MARION FORTIES EAST : N to NW 35 in the south-west drifting to the south-
east by mid-period.
SYNOPTIC CHART 12:00Z
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High 1029 39s15w, High 10232 hPa 34s52e
1. Cold Front: 31s03ew 38s15e 48s23e 56s28e into 62s25e
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : SE 10 to 20, reaching 25 at times in the west from mid-period.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 05 to 15, but S to SW 05 to 15 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : SE to S 15 to 25 reaching 30 to 35 in the extreme south-east.
VIS : Good, but moderate to poor in showers and thundershowers in
the south-east until mid-period.
SEA STATE: 3.0 to 4.0m in the south spreading to the north by the end of the
period, reaching 4.5 to 5.5m in the south-east, with S to SW
swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 05 to 15, reaching 20 at times in the south. It will
become cyclonic 25 to 35 in the extreme south-west towards mid-
period.
VIS : Good, but moderate to poor in showers and thundershowers in
the south-west reaching very poor at times.
SEA STATE: 3.5 to 4.5m in the south, spreading to the central parts towards
mid-period, with S to SW swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Anti-cyclonic 05 to 15, but SE 20 to 25 in the extreme north-east.
It will become N 15 to 25 in the west from early morning, reaching
30 in the south-west.
VIS : Good, but moderate in showers and rain in the south-west from mid-
period.
SEA STATE: 3.0 to 4.0m, reaching 4.5m in the extreme east, with S to SW swell
but NW in the extreme south-west. It will subside in the north-
west.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anti-cyclonic 05 to 15 becoming S to SE 15 to 25 in the northern
half from mid-period, reaching 30 in the extreme north-west.
VIS : Good, but moderate in showers and rain in the extreme north-west.
SEA STATE: 3.5 to 4.5m, reaching 5.0 to 7.0m in places over the southern
half, with SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to SW 10 to 20 in the west becoming anti-cyclonic 05 to 15 from
mid-period spreading over the central parts by the end of the
period, otherwise N to NW 10 to 20 reaching 25 at times over the
central south drifting to the south-east by mid-period.
VIS : Moderate in showers and thundershowers, becoming good in the west
from mid-period.
SEA STATE: 3.0 to 4.0m (except in the north-east from mid-period), with W to
NW swell, but 3.5 to 4.5m in the west reaching 5.0 to 7.0m in the
west, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : N to NE 10 to 20 in the east, otherwise variable 05 to 10.
VIS : Good, but moderate in showers and thundershowers in places over
the central parts.
SEA STATE: 3.0 to 3.5m in the east, with S swell.
MOZAMBIQUE CHANNEL:
WIND : Variable 05 to 10 in the south and central parts, otherwise S to
SE 05 to 15 spreading to the central and southeastern parts by
the end of the period.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : Variable 05 to 10 in the extreme south-west, otherwise E to SE 15
to 25.
VIS : Moderate in showers and rain in places.
SEA STATE: 3.0m, with S to SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to NW 15 to 25 reaching 30 at times, but SW 15 to 25 in the
extreme north-west from mid-period.
VIS : Good, but moderate in showers and thundershowers in places and
clearing from the west.
SEA STATE: 3.0 to 4.0m, with W to NW swell but 4.0 to 5.0m with SW swell in
the extreme south-west and north-west.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/06/23 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (Wind gusts may be about 40% stronger than the averages given here).
PART 1: WARNING
Nil.
PART 2: GENERAL SYNOPSIS, 26/06/23 AT 0000UTC
- High 1030 hPa near 35S/50E, moving slowly Eastward and building.
- High 1027 hPa near 45S/50E, moving slowly Eastward and building.
- Low 1005 hPa near 34S78W, moving Eastward.
PART 3: FORECAST FOR 24 HOURS FROM 26/06/23 at 0600UTC to 26/06/24 at 0600UTC
WAM (30S/40S, 50E/65E)
Few showers.
WIND : Anticlockwise 3 to 5.
SEA : Rough to very rough. Southwesterly swell 3 to 4 m.
VIS : Good.
AMS (30S/40S, 65E/80E)
Few showers.
WIND : S to SE 5 to 6 becoming anticlockwise 3 to 5 by South-Western later.
SEA : rough to very rough. SW swell 3 to 5 m.
VIS : Good.
CRO (40S/50S, 50E/65E)
Scattered showers over Northern.
WIND : Anticlockwise 3 to 5 setting up NW 5/6 locally 7 over South-Western at the end.
SEA : rough to high from West to East becoming rough at the end. Southwest swell 3 to 5 m abating.
VIS : poor under showers
KER (40S/50S, 65E/80E)
Scattered showers.
WIND : SW 5 to 7 from North to South becoming anticlockwise 3 to 5 over Northern and westerly 5 to 6 over Southern.
SEA : Very rough to high from West to East. SW swell 4 to 6 m.
VIS : Poor under rain.