WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
25TH OF MAY 2026 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 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. MARION FORTIES EAST: N to NW 35 in the south-west from mid-period,
spreading to the south-east towards the end of the
period.
SYNOPTIC CHART 12:00Z
=====================
High 1028 hPa 44s34e High 1026 hPa 34s37e.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 10 to 20.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20, but SW 05 to 15 in the east becoming variable 05
to 10 towards the end of the period.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : SE to E 10 to 15 but variable 05 in the south.
VIS : Good.
SEA STATE: 3.0 to 4.0m in the south-west spreading to the south-east by
mid-period, with S to SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Anticyclonic 05 to 15 in the south-west spreading to the south-
east towards the end of the period, otherwise E to SE 10 to 20.
VIS : Good.
SEA STATE: 3.0 to 4.0m in the south-west from mid-period, with SW swell.
TRISTAN (30S/40S, 00E/20W) :
WIND : W to NW 15 to 25 reaching 30 in the southern parts towards mid-
period, becoming SW 15 to 25 in the west from mid-period.
VIS : Good, becoming moderate in showers and rain in the south from mid-
period.
SEA STATE: 3.0 to 4.0m, except in the north-east at first, reaching 5.0 to
6.0m in the south but 6.5 to 7.5m in the first half of the period,
with SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : W to SW 10 to 20 in the south, otherwise anticyclonic 05 to 15 but
N to NW 20 to 30 in the south-west spreading to the south-east by
the end of the period.
VIS : Good, but moderate in showers in the south.
SEA STATE: 3.0 to 4.0m, except in the north, reaching 5.0 to 6.0m in the
south-west, with SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NE 10 to 20 over the central parts, otherwise anticyclonic 05
to 15 but W to SW 10 to 20 in the west.
VIS : Good, but moderate in showers and thundershowers in the south-west
spreading to the central parts by mid-period.
SEA STATE: 3.0 to 3.5m in the west, with S to SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : E to SE 10 to 20 but N to NE 10 to 20 in the south-west.
VIS : Good but moderate to poor in showers and thundershower in the
east.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 20 but variable 05 to 10 in the south-west.
VIS : Good but moderate in light rain in places in the west until mid-
period.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : NE 05 to 15 in the south, becoming variable 05 from mid-period,
otherwise SE to E 10 to 20.
VIS : Good but moderate in showers and rain in south and in places over
the central parts.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Anticyclonic 05 to 15 but N to NW 20 to 30 in the west reaching 35
in the south-west from mid-period, spreading to the south-east
towards the end of the period.
VIS : Good, becoming moderate in showers and rain in the west from mid-
period spreading to the south-east towards the end of the period.
SEA STATE: 3.0 to 4.0m, except in the north-east, reaching 4.5 to 5.0 over
the central and southern parts, with W to SW swell, but NW swell
in the south.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/05/25 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, 26/05/25 AT 1200UTC
Cold font axed NW/SE crossing WAM and CRO, slowly moving eastwards.
High 1025 hPa near 32S/65E with associated ridge to SE.
High 1027 hPa near 44S/34E, moving ENE, expected 1033 hPa near 42S/56E at end.
PART 3: FORECAST FOR 24 HOURS FROM 26/05/25 at 1800UTC to 26/05/26 at 1800UTC
WAM (30S/40S, 50E/65E)
Frontal rain and showers over western, moving eastwards.
WIND: At first, NW 5/6 with gusts ahead of the front backing
SW 4/5 behind. Later, anticlockwise 3/4 at times 5.
SEA: Moderate to rough from west to east.
VIS: Poor in precipitation.
AMS (30S/40S, 65E/80E)
Frontal rain and showers arriving over South-Western area later
WIND:At first, anticlockwise 3/4 at times 5 setting up soon NW 5/6
ahead of the front backing SW 6/7 behind. Gusts.
SEA: Rough or very rough, becoming moderate or rough later. Long SW
swell 4 to 5 m, abating.
VIS: Poor in precipitation.
CRO (40S/50S, 50E/65E)
Frontal rain and showers moving eastwards.
WIND: NW 5/6, at times 7 ahead the front, backing SW 6/7. Severe gusts.
Later, anticlockwise 3/4 at times 5 but NW 6/7 over far South-Western
area.
SEA: Rough to very rough by SW later. SW swell 4 to 5 m over Southern later.
VIS: Poor in precipitation.
KER (40S/50S, 65E/80E)
Rain and showers moving Eastward.
WIND: NW 5/6 locally 7 with severe gust ahead of the front, then SW 6/7
with severe gusts behind the front.
SEA: Rough to very rough by SW. Arrival of SW swell 4 to 5 m over
South-Western area at end.
VIS: Poor in precipitation.