WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
17TH 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 171000 TO 181000 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 west, drifting to the south by mid-
period.
2. MARION FORTIES EAST: N to NW 35 in the south-west from late
afternoon, drifting to the south-east from mid-
period.
SYNOPTIC CHART 06:00Z
=====================
High 1028 hPa 33s01w, High 1028 hPa 38s40e.
Low 984 hPa 58s29e
1. Cold Front: 37s11e 43s20e 47s25e 52s31e into 58s29e.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 10 to 20.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : Variable 05 to 10 in the east, otherwise S to SE 10 to 20.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : N to NW 15 to 25 in the south and south-west, otherwise E to
SE 10 to 20.
VIS : Good, but moderate in rain in places in the west and south-
west.
SEA STATE: 3.0m in the east, with SE swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 10 to 20, reaching 25 in the south and south-east at
times.
VIS : Good.
SEA STATE: 3.0m in the west, central and southern parts, with S to SE
swell.
TRISTAN (30S/40S, 00E/20W) :
WIND : E to NE 15 to 25 in the southern parts, otherwise N to NW 15
to 25, reaching 30 to 35 in the west, drifting to the south by
mid-period.
VIS : Good, but moderate to poor in showers and thundershowers in
the western, central and southern parts, clearing in the west
from the evening.
SEA STATE: 3.0 to 3.5m in places in the west and central parts, spreading
to the south from mid-period, with NW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : E to NE 05 to 15 in the south-west, otherwise S to SE 15 to
25, reaching 30 in places in the east and south-east.
VIS : Good, but moderate in showers and rain in places in the
south-east.
SEA STATE: 3.0 to 4.0m in places in the north, east and southern parts,
with S to SE swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Anti-cyclonic 05 to 15, but S to SE 15 to 25 in the south-
west, spreading to the west towards the end of the period.
VIS : Good, but moderate in light showers and rain in places in the
west, spreading to the south from mid-period.
SEA STATE: 3.0 to 4.0m in places in the east, as well as extreme west
from mid-period, reaching 4.5 to 5.0m in the south-east at
first, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Variable 05 to 10 in the north-east, but N to NE 10 to 20 in
the south-west, reaching 25 until mid-period, otherwise E to
SE 15 to 25.
VIS : Good, but moderate in showers and rain in the central and
northern parts, but moderate to poor in showers and
thundershowers in the east.
SEA STATE: 3.0 to 3.5m in the east and central parts, with S to SE swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 20, reaching 25 to 30 in the south-east at
times.
VIS : Good, but moderate in showers and thundershowers in places in
the south and western parts.
SEA STATE: 3.0 to 3.5m in the south and central parts, with S to SE
swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : SE to E 05 to 15.
VIS : Moderate in showers and rain in places, but moderate to poor
in showers and thundershowers in the south-west.
SEA STATE: 3.0 to 3.5m in the south until tomorrow morning, with SE to S
swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : N to NW 15 to 25, becoming SW 15 to 25 in the west from late
afternoon, reaching 30 to 35 in the south-west, drifting to
the south-east from mid-period.
VIS : Good, but moderate in showers and rain in the south-west,
drifting to the central and eastern parts from mid-period.
SEA STATE: 3.0 to 4.0m (except in the north-west), but 4.5 to 5.5m in the
south-west, spreading to the south-east from mid-period,
reaching 6.0 to 6.5m in the south from tomorrow morning, 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)
26/05/17 AT 0600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE ON KER.
PART 2: GENERAL SYNOPSIS, 26/05/17 AT 0000UTC
- COLD FRONT CF AXIS 20S/52E, 34S/65E, 40S/27E ET 41S/80E.
- TROUGH TOWARD KER.
- COLD FRONT CG ARRIVING OVER CRO AT END.
PART 3: FORECAST FOR 24 HOURS FROM 26/05/17 AT 0600UTC TO 26/05/18 AT 0600UTC
WAM (30S/40S, 50E/65E)
RAIN OR SHOWERS OVER NORTHERN.
WIND : SOUTHERLY 4/5 LOCALLY 6 OVER NORTHWESTERN AREA AND SOUTHEASTERN
AREA.
SEA : ROUGH TO VERY ROUGH OVER SOUTHERN. SW SWELL 3 TO 4 M.
VIS : POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
RAIN, SHOWERS OR SQUALLS.
WIND : SOUTH-WESTERLY 4/5 LOCALLY 6/7 OVER SOUTHERN.
SEA : ROUGH TO VERY ROUGH OVER SOUTHERN. SW SWELL INCREASING 3 TO 5 M
OVER SOUTHERN.
VIS : POOR TO VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
SHOWERS OVER EASTERN AREA AT FIRST AND ARRIVAL OF SHOWERS OR SQUALLS OVER CG FROM THE WEST AT END
WIND : WESTERLY 6/7. GUSTS AT FIRST.
SEA : VERY ROUGH TO HIGH BECOMING ROUGH TO VERY ROUGH OVER WESTERN AT
END. SW SWELL 4 TO 6 M.
VIS : POOR TO VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
RAIN, SHOWERS OR SQUALLS.
WIND : WESTERLY 6/7 LOCALLY 8 AT FIRST. SEVERE GUSTS.
SEA : VERY ROUGH TO HIGH. SW SWELL INCREASING 4 TO 6 M.
VIS : POOR TO VERY POOR IN PRECIPITATION.