WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
27th OF MAY 2026 AT 08:30 UTC.
FOR SOUTH-EAST SECTOR OF METAREA. VII, PREPARED BY REUNION, SEE AREA 2
BELOW.
NOTE: WX OBSERVATIONS.
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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 271000 TO 281000 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: N to NW 35 in the south-west from mid-period.
SYNOPTIC CHART 06:00Z
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High 1035 hPa 39s60e.
Low 951 hPa 55s17e, Low 1015 hPa 42s40.
Cold front: 36s02e 40s10e 45s16e 50s21 55s25e 58s19e into 55s17e.
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 10 to 15.
VIS : Good.
SEA STATE: 3.0m in the south, with S to SW swell.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20, but SW 05 to 10 in the east.
VIS : Good.
SEA STATE: 3.0 to 3.5m in the south-west, with S swell.
ST HELENA (15S/30S, 00E/20W):
WIND : N to NW 10 to 20 in the south-west, otherwise SE to E 10 to 15
but variable 05 in the south-east.
VIS : Good, but moderate in showers and thundershowers in the south-
west.
SEA STATE: 3.0 to 3.5m, with S to SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Anticyclonic 05 to 10 in the south, otherwise S to SE 10 to
20 reaching 25 in the north-east.
VIS : Good.
SEA STATE: 3.0 to 3.5m, with SW swell.
TRISTAN (30S/40S, 00E/20W) :
WIND : Anticyclonic 05 to 15 in the east, otherwise N to NW 10 to 20.
VIS : Good, becoming moderate in showers and rain in the west from
mid-period.
SEA STATE: 3.0 to 3.5m reaching 4.0 to 5.0m in the south-east for the
first half of the period, with SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : NW 20 to 30 in the south-east for the first half of the
period, otherwise S to SW 10 to 15. It will become
anticyclonic 05 to 15 across the area from mid-period.
VIS : Good in the north-east, otherwise moderate in showers and
rain.
SEA STATE: 3.0 to 4.0m reaching 5.0 to 6.0m in the south, with SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Variable 05 to 10 over the central parts for the first half of
the period, otherwise N to NW 10 to 20 reaching 25 to 30 in
the south-west. It will become S to SW 10 to 20 in the west
from mid-period.
VIS : Good over the central parts for the first half of the period,
otherwise moderate in showers and thundershowers.
SEA STATE: 3.0 to 4.0m in the west reaching 4.5 to 5.5m in the south-west
from mid-period, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : NE 10 to 20 reaching 25 in the east but SE to E 05 to 15 over
the central parts.
VIS : Good but moderate to poor in showers and thundershowers in the
east.
SEA STATE: 3.0m in the east, with E to SE swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 15.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : Variable 05 but E to SE 10 to 15 in the north.
VIS : Good, but moderate in showers and thundershowers in the south
and east.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : N to NW 15 to 25 reaching 30 to 35 in the south-west from mid-
period.
VIS : Moderate in showers and thundershowers in the north-east at
first, otherwise good. It will become moderate to poor in
showers and rain over the entire area from mid-period.
SEA STATE: 3.0m reaching 4.0 to 5.0m in the south-west from mid-period,
with SW to W swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/05/27 AT 0600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
STRONG GALE RUNNING OVER EAST AMS
GALE FORCE 8 RUNNING OVER NORTHEAST KER
PART 2: GENERAL SYNOPSIS, 26/05/27 AT 0000UTC
- COLD FRONT CF AXIS 34S/73E, 36S/75E, 40S/76E, 42S/78E, 44S/81E, MOVING SLOWLY EASTWARDS.
- COLD FRONT CG AXIS 46S/40E, 50S/45E, 55S/50E, MOVING EASTWARD 25 KT.
- HIGH-PRESSURE SYSTEM 1033 HPA NEAR 40S/60E, MOVING EASTWARD.
PART 3: FORECAST FOR 24 HOURS FROM 26/05/27 AT 0600UTC TO 26/05/28 AT 0600UTC
WAM (30S/40S, 50E/65E)
SCATTERED SHOWERS OVER WESTERN AREA.
WIND : ANTICLOCKWISE 3 TO 4, INCREASING EASTERLY 4 TO 5 OVER NORTH AREA AND NORTHEAST TO NORTH 45 OVER WEST AREA.
SEA : MODERATE TO ROUGH. SOUTH TO SOUTHWEST SWELL 2 TO 3 METERS.
VIS : MODERATE UNDER SHOWERS.
AMS (30S/40S, 65E/80E)
RAIN AND FREQUENT SHOWERS UNDER CF.
WIND : EAST OF CF, NORTH TO NORTHWEST 5 TO 6 ; WEST OF CF, SOUTHERN
6 TO 7, LOCALLY 8 TO 9, WEAKENING TO 4 TO 5 IN THE WESTERN AREA, LOCALLY 3 IN THE EXTREME SOUTHWEST. GUSTS SEA : BECOMING STRONG TO VERY STRONG, LOCALLY HEAVY IN THE EASTERN AERA. SOUTH TO SOUTHWEST SWELL 2 TO 3 METERS, LOCALLY 4 TO 5 METERS IN THE EASTERN REGION.
VIS : POOR DURING HEAVY RAIN.
CRO (40S/50S, 50E/65E)
SCATTERED SHOWERS, FOLLOWED BY RAIN AND FRONTAL SHOWERS ASSOCIATED WITH THE COLD FRONT (CG) IN THE WESTERN PART OF THE REGION BY LATE AFTERNOON.
WIND : IN THE NORTHEAST, NORTHWEST 3 TO 4, INCREASING 4 TO 5.
ELSEWHERE, NORTHWEST 5 TO 6, LOCALLY REACHING 7 IN THE SOUTH, WEAKENING 3 TO 4 AND BECOMING ANTICLOCKWISE AT FIRST IN THE SOUTHWEST AREA MOVING SOUTHEAST AREA BY THE END.
SEA : ROUGH LOCALLY VERY ROUGH ON SOUTH AREA, DECREASING MODERATE TO ROUGH IN THE NORTHERN HALF OF THE AREA. SOUTHWESTERLY SWELL 2 TO 3M.
VIS : POOR UNDER RAIN.
KER (40S/50S, 65E/80E)
RAIN AND FREQUENT SHOWERS OVER NORTHEAST AREA AT FIRST.
WIND : IN THE SOUTHERN HALF OF THE AREA, WEST 4 TO 5, INCREASING 5 TO 6 LOCALLY 7, WEAKENING 3 TO 4 IN THE WEST AT END.
IN THE NORTHERN HALF, SOUTH 4 TO 5, INCREASING 6 TO 7, LOCALLY 8 OVER THE NORTHEASTERN PART OF THE AREA DURING THE FIRST HALF OF THE PERIOD.
SEA : ROUGH TO VERY ROUGH. SOUTHWESTERLY SWELL 3M.
VIS : POOR UNDER RAIN AND FREQUENT SHOWERS