WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
25TH OF MAY 2026 AT 08:30 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 251000 TO 261000 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: S to SW 35 in the south-east for the first half of
the period.
SYNOPTIC CHART 06:00Z
=====================
High 1028 hPa 44s30e High 1026 hPa 34s36e.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 10 to 20.
VIS : Good.
SEA STATE: 3.0m in the north-west subsiding towards the end of the period,
with S to SE swell.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20, but SW 05 to 15 in the east.
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 from
mid-period, with S to SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Anticyclonic 05 to 15 in the south-west, otherwise E to SE 10 to
20.
VIS : Good.
SEA STATE: 3.0m in the south-west towards the end of the period, with SW
swell.
TRISTAN (30S/40S, 00E/20W) :
WIND : W to NW 15 to 25 reaching 30 in the south-east towards mid-period,
becoming SW 15 to 25 in the west towards the end of the period.
VIS : Good, becoming moderate in showers and rain in the south towards
the end of the period.
SEA STATE: 3.0 to 4.0m, except in the north-east, reaching 5.0 to 6.0m in the
south but 6.5 to 7.5m in the extreme south, with SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : N to NW 15 to 25 in the north-west spreading to the south-east
from mid-period, otherwise W to SW 05 to 15, but anticyclonic 05
to 15 in the north-east.
VIS : Good, but moderate in showers and rain in the south-east until
mid-period.
SEA STATE: 3.0 to 4.0m, except in the north, reaching 5.0 to 6.0 towards mid-
period, with SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NE 10 to 20 over the western and central parts, otherwise
anticyclonic 05 to 15 but S to SE 15 to 20 in the south-east. It
will become W to SW 10 to 20 in the west from mid-period.
VIS : Good, becoming moderate in showers and thundershowers in the
south-west from 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 15 over the central parts, otherwise N to NE 10 to
20.
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.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : NE 05 to 15 in the south, 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 : S to SW 20 to 30 in the east for the first half of the period,
reaching 35 in the south-east, otherwise anticyclonic 05 to 15. It
will become N to NW 20 to 30 in the 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 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 until mid-period, 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)
26/05/25 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, 26/05/25 AT 0000UTC
- COLD FONT AXED NW/SE CROSSING WAM AND KER, SLOWLY MOVING EASTWARDS.
- HIGH 1025 HPA NEAR 31S/65E WITH ASSOCIATED RIDGE TO SE.
- HIGH 1030 HPA NEAR 43S/45E, MOVING ENE, EXPECTED 1034 HPA NEAR 39S/60E AT END.
PART 3: FORECAST FOR 24 HOURS FROM 26/05/25 AT 0600UTC TO 26/05/26 AT 0600UTC
WAM (30S/40S, 50E/65E)
FRONTAL RAIN AND SHOWERS OVER WESTERN, MOVING EASTWARDS.
WIND : ANTICLOCKWISE 3/4 AT TIMES 5, BUT NW 5/6 WITH GUSTS AHEAD OF THE FRONT
BACKING SW 4/5 BEHIND.
SEA : MODERATE TO ROUGH FROM WEST TO EAST.
VIS : POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
FEW SHOWERS.
WIND : SW 5/6 AT TIMES 7 WITH SEVERE GUSTS OVER EASTERN, ANTICLOCKWISE 3/4
OVER WESTERN, BECOMING NW 5/6 OVER SOUTHERN AT END.
SEA : ROUGH OR VERY ROUGH, AND LOCALLY HIGH OVER EASTERN AT FIRST, BECOMING
MODERATE OR ROUGH AT END. LONG SW SWELL 5 TO 5M, ABATING.
VIS : POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
FRONTAL RAIN AND SHOWERS MOVING EASTWARDS.
WIND : N 5/6, AT TIMES 7 WITH SEVERE GUSTS AHEAD THE FRONT, BACKING W
5/6 BEHIND, THEN INCREASING SW 6/7 WITH SEVERE GUSTS LATER.
SEA : MODERATE TO ROUGH, BECOMING ROUGH TO VERY ROUGH BY SW LATER. SW SWELL
4 TO 5M OVER SOUTHWESTERN AT END.
VIS : POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
FEW SHOWERS AT FIRST, THEN FRONTAL RAIN AND SHOWERS OVER WESTERN AT END.
WIND : ANTICLOCKWISE 3/4, AT TIMES 5, INCREASING NW 5/6 LOCALLY 7 WITH SEVERE
GUST OVER WESTERN AHEAD OF THE FRONT , THEN SW 6/7 WITH SEVERE GUSTS
BEHIND THE FRONT AT END.
SEA : MODERATE TO ROUGH FROM W TO E, LOCALLY VERY ROUGH OVER NORTHEASTERN AT
FIRST, BECOMING ROUGH LATER.
VIS : POOR IN PRECIPITATION.