WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
20TH OF JUNE 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 202200 TO 212200 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-western and south-central parts until
mid-period. It will become W to W 35 in the south-west from
mid-period.
2. DURBAN EAST: S to SE 35 in the east at first.
3. MARION FORTIES EAST: SW 35 in places in the south towards mid-period.
SYNOPTIC CHART 12:00Z
=====================
High 1028 40s08w, High 1020 hPa 28s03w, High 1033 hPa 35s36e
Low 1013 hPa 48s07e
1. Cold Front: 30s09w 34s03w 40s03w 45s09e into 48s07e
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 05 to 15.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 05 to 15, but SW 05 to 15 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : Variable 05 to 10 in the south-east, otherwise E to SE 05 to
15.
VIS : Good, but moderate in showers and rain in the south-west and in
places in the central and north at first.
SEA STATE: 3.0 to 3.5m in the west and central until mid-period, with S to SW
swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Variable 05 to 10 in the south-east and south-west, otherwise S to
SE 10 to 15.
VIS : Good.
TRISTAN (30S/40S, 00E/20W):
WIND : E to SE 10 to 20 in the east until mid-period, otherwise N to NW
15 to 25 in the south-west, spreading to the central and east by
mid-period, reaching 30 to 35 in the south-west and south-central
until mid-period. It will become W to SW 15 to 25 in the south-
west spreading over the southern-parts, reaching 30 to 35 from
mid-period.
VIS : Good, but moderate in showers and rain in the south-west spreading
to the south-east from mid-period.
SEA STATE: 3.0 to 4.0m except in the north-east, reaching 4.5 to 5.5m in the
south-west from mid-period, becoming 6.0 to 7.0m in the extreme
south-west from mid-period, with S to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : E to SE 05 to 15 in the north until mid-period and south, reaching
20 to 25 in the south at first, otherwise variable 05 to 10 over
the central until mid-period. it will be come N to NW 15 to 25 in
the south-west towards the end of the period.
VIS : Good, but moderate in showers and rain in the south-west
until mid-period.
SEA STATE: 3.0 to 3.5m in the south-west, spreading to the central from
period, with W to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : anticyclonic 05 to 15 over the central parts spreading to the east
until mid-period but N to NE 15 to 25 in the west spreading to the
central. It will become variable 05 to 15 in the extreme west
towards mid-period.
VIS : Good.
SEA STATE: 3.0 to 4.0m except in the west, reaching 4.5 to 5.5m in the
at first, with S to SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : E to NE 15 to 25 in the west and central, otherwise S to SE 15 to
25, reaching 30 to 35 in the east at first. It will become
variable 05 to 10 in the south-central parts from mid-period.
VIS : Good, but moderate in showers and showers in the eastern
Parts at first.
SEA STATE: 3.0 to 4.0m except in the south-west, reaching 4.5 to 5.5m in the
central and east but 6.0 to 6.5m extreme east until mid-period,
with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : SW 10 to 20 in the north-east at first, otherwise S to SE
10 to 20, reaching 25 to 30 in the central and southern parts in
the first half of the period.
VIS : Good, but moderate in showers and rain in the west and in places
over the central at first.
SEA STATE: 3.0 to 4.0m in the southern parts, spreading over the central
parts by mid-period, reaching 4.5 in the south-east at first, with
S to SE swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : S to SE 15 to 25, reaching 30 in the north-west towards the end of
the period.
VIS : Good but moderate in showers and rain in the west and in places
over the central and north.
SEA STATE: 3.0 to 4.0m in the south, spreading over the central parts by mid-
period, while reaching 4.5 to 5.5m in the southern and central
parts, with S to SW swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to NW 15 to 25 but SW 15 to 25 in south-west spreading central
and south-east, reaching 30 to 35 in the south towards mid-period.
VIS : Good, becoming moderate in showers and rain in the south,
spreading to the central from mid-period.
SEA STATE: 4.5 to 5.0m, reaching 5.5 to 6.5m, with W to SW swell. It will
become 7.0 to 8.0m in the south from mid-period.
AREA 2:
=======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/06/20 AT 1700UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (Wind gusts may be about 40% stronger than the averages given here).
PART 1: WARNING
Gale over WAM, AMS and KER.
Locally Strong gale over WAM.
PART 2: GENERAL SYNOPSIS, 26/06/20 AT 1200UTC
Waving front axis 29S/60E, 37S/64E, 45S/76E, 47S/74E with low
987 hPa near 47S/74E, leaving area soon and low 1003 hPa near
35S/61E, expected 998 hPa near 33S/64E at the end.
High 1032 hPa near 35S/37E with a ridge extending eastward.
PART 3: FORECAST FOR 24 HOURS FROM 26/06/20 at 1800UTC to
26/06/21 at 1800UTC
WAM (30S/40S, 50E/65E)
Rain and frontal showers. Squalls.
WIND: Western half: Southerly 6/7, decreasing 4/6 from the south
during the period. Eastern half: clockwise 4/6, locally 7,
increasing during the day 7/8, locally 9 with violent gusts near the
centre.
SEA: Very rough to high, locally rough in the south. South-west
swell 3 to 5 meters, abating in the south.
VIS: Very poor in precipitation.
AMS (30S/40S, 65E/80E)
Rain and frontal showers over the west. Squalls.
WIND: Western half: Northerly 5/6 with Southeast 5/6 in the
southwest at first, becoming soon clockwise 4/6,
locally 7, reaching locally 8 in the southwest later. Eastern half:
northerly 4/5, reaching 6 later in the west.
SEA: Rough, but moderate in the northeast, becoming very rough
later in the far west. Arrival of clockwise swell 3 to 5
meters in west during the day.
VIS: Poor to very poor in precipitation.
CRO (40S/50S, 50E/65E)
Showers.
WIND: Westerly 5/6 in the north and 6/7 with violent gusts in the south,
decreasing at end westerly to south-westerly 4/5 with westerly 6/7 in
the far south. But southerly 3/5 in the northeast at start.
SEA: Rough to very rough, becoming high in the southern quarter. Southwest
swell 2 to 4 meters, increasing to 4 to 6 meters over southern.
VIS: Poor in precipitation.
KER (40S/50S, 65E/80E)
Rain and frontal showers. Gusts.
WIND: Northern half: Southerly 4/5 in the west and Westerly 5/6, locally
7 in the east, becoming variable anticlockwise 2/4 during the day with
westerly 5/6 in the south. Southern half: Westerly 6/7, locally 8 with
violent gusts, but at first clockwise 6/7 locally 8 in the east.
SEA: Rough to very rough, becoming high in far southwest at end.
Southwest swell 2 to 4 meters, but northwest swell 2 to 4
meters in the east at the start.
VIS: Poor to very poor in precipitation.