WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
23RD OF DECEMBER 2025 AT 16:30 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. MARION FORTIES EAST: NW to N 35 north and south-east in the first half
of the period.
SYNOPTIC CHART 12:00Z
=====================
High 1026 hPa 38s01e, High 1030 hPa 38s55e.
Low 990 hPa 56s31e.
1. Cold Front: 40s21e 45s27e 50s33e 55s34e into 56s31e.
AREA FORECAST:
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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 10 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : SE to E 05 to 15.
VIS : Good.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 10 to 20, reaching 25 in the south-east towards mid-
period.
VIS : Good.
TRISTAN (30S/40S, 00E/20W):
WIND : E to SE 05 to 15 in the north-east until mid-period, otherwise
variable 05 to 10, but NW to W 10 to 20 in the south.
VIS : Good, but moderate in showers and rain in the south and
central parts.
CAPE WEST (30S/40S, 00E/20E):
WIND : S to SE 10 to 20 in the north reaching 25 to 30 in the north-
east, otherwise anticyclonic 05 to 10, but NW 10 to 20 in the
south-west towards mid-period.
VIS : Good.
SEA STATE: 3.0 to 3.5m in the south-east drifting to the north-east
towards the end of the period, with S to SE swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : NE to N 15 to 25 reaching 30 in the south-east until mid-
period, but S to SE 15 to 25 over the western half reaching 30
in the south-east at first, becoming anticyclonic 05 to 10 in
the south-west from mid-period.
VIS : Good, but moderate in showers and thundershowers in the north-
west and central parts spreading to the east by the end of the
period.
SEA STATE: 3.0m to 3.5m except in the south-east subsiding in the west
from mid-period, with NE swell, but S to SE in the west.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : E to NE 15 to 25 becoming variable 05 to 10 in the north-west
towards mid-period, while becoming SW to S 10 to 20 in the
south-west reaching 25 towards the end of the period.
VIS : Good, but moderate in showers and thundershowers in the east
and south-west.
SEA STATE: 3.0m to 3.5m, except in the north-west, subsiding over the
western half from mid-period, with NE swell.
MOZAMBIQUE CHANNEL:
WIND : N to NE 05 to 15 in the north, becoming SE 05 to 15 in the
south towards the end of the period.
VIS : Moderate in showers and thundershowers at times.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to NE 10 to 20.
VIS : Moderate in showers and thundershowers at times.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : NW to N 20 to 30, reaching 35 in the north and south-east in
the first half of the period, but SW 15 to 25 in the south-
west spreading to the north-west and south-east by mid-period.
It will become W to NW 10 to 20 in the south-west towards the
end of the period.
VIS : Good, but moderate to poor in rain and showers in a band from
the north-west to south-east drifting to the north-east
towards the end of the period.
SEA STATE: 3.0 to 4.0m in the west and south, spreading to the north-east
from mid-period, with NW to W swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA
ACK (AMSTERDAM-CROZET-KERGUELEN)
25/12/23 AT 1600UTC
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, 25/12/23 AT 1200UTC
- Cold front CF 38S/25E, 55S/38E reaching CRO soon.
- High 1031 near WAM slow-moving eastward.
PART 3: FORECAST FOR 24 HOURS FROM 25/12/23 at 1800UTC to 25/12/24 at 1800UTC
WAM (30S/40S, 50E/65E)
WIND: anticlockwise 3/5 locally E 6 over far north-western.
SEA: becoming moderate from south.
VISI: good.
AMS (30S/40S, 65E/80E)
Scattered rain over far northern.
WIND: anticlockwise 3/5.
SEA : rough becoming moderate from west at end. SW swell 2 to 3 m.
VISI: good, poor over far northern.
CRO (40S/50S, 50E/65E)
Fog patches at first, rain (CF) over south-western soon.
WIND: increasing NW 6/7
SEA : moderate to rough, locally very rough over southern by
W swell 2 to 4 m.
VISI: poor in precipitations.
KER (40S/50S, 65E/80E)
Scattered rain at first.
WIND: W 4/6, increasing 7 over southern at end.
SEA : rough by W swell 2 to 4 m.
VISI: poor in precipitation.