WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
17th OF JULY 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. CAPE EAST: cyclonic 35 to 40 over the central and eastern parts
2. MARION FORTIES EAST: Cyclonic 35 to 45 in places in the north
and spreading to the north-east from mid-period.
SYNOPTIC CHART 06:00Z
=====================
High 1027 hPa 33s79e, High 1031 hPa 30s30w, High 1028 hPa 47s20e
Low 1015 hPa 34s03w, Low 1015 hPa 39s12e, Low 1001 hPa 40s37e
1. Cold Front: 36s32e 37s36e 39s39e into 40s37e
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 SW 05 to 10 in the east, otherwise S to SE 05 to 10.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : N to NW 05 to 15 in the south-east, otherwise S to SE 10 to 20
but variable 05 to 15 in the north-east.
VIS : Good but moderate in showers and thundershowers in the
central, southern and western parts.
SEA STATE: 3.0m in the western and southern parts, with S to SW
swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Variable 05 to 15 but S to SE 05 to 15 in the central and
northern parts.
VIS : Good.
TRISTAN (30S/40S, 00E/20W):
WIND : Cyclonic 15 to 25 in the east for the first half of the
period, otherwise anti-cyclonic 10 to 20 reaching 25 in the
north-east.
VIS : Good but moderate in showers and thundershowers in the
eastern parts.
SEA STATE: 3.0 to 3.5m in places, with S to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Variable 05 to 15 in the northern parts, otherwise cyclonic 15
to 25.
VIS : Good but moderate in showers and rain in the western and
southern parts.
SEA STATE: 3.0 to 4.0m in the southern and western parts, with S to SW
swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to SW 10 to 20 in the north-west , otherwise cyclonic 35 to
40 over the central and eastern parts. It will become cyclonic
15 to 25 in the west towards mid-period reaching 30 in the
south-west.
VIS : Good but moderate to poor in showers and thundershowers in the
central and eastern parts as well as in the south-west towards
mid-period.
SEA STATE: 3.0 to 4.0m in the western parts, reaching 5.5 to
7.5m in the central and southern parts, spreading to the
eastern parts towards mid-period, with W to SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Variable 05 to 15, but W to SW 15 to 25 in the southern parts
becoming anticyclonic 05 to 15 in the north-west from mid-
period.
VIS : Good.
SEA STATE: 3.0 to 4.0m in the southern parts reaching 5.0m in the south
from the second half of the period, with E to SE swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 20 in the south and central parts but variable
05 to 10.
VIS : Good but moderate in rain in the central and northern parts.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : Variable 05 to 10 in the central and north at first,
otherwise S to SE 05 to 15.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Cyclonic 20 to 30, reaching 35 to 45 in places in the north
and spreading to the north-east from mid-period, otherwise
anti-cyclonic 10 to 20.
VIS : Good but moderate to poor in showers and thundershowers in the
in the northern parts, drifting to the north-east from mid-
period.
SEA STATE: 3.5 to 4.5m northern parts, reaching 5.0 to 6.0m in the north
and north-east, with W to NW swell.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/07/17 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE OVER NORTH-WESTERN CRO EXPECTED AT THE END.
PART 2: GENERAL SYNOPSIS, 26/07/17 AT 0000UTC
- RIDGE OVER AMS EXTENDING WESTWARD.
- COLD FRONT AXIS 35S/50E, 40S/58E, 45S/64E AND 50S/68E MOVING EASTWARD.
- DISTURBANCE REACHING SOUTH-WESTERN WAM AND NORTH-WESTERN CRO TONIGHT AND MOVING EASTWARD.
PART 3: FORECAST FOR 24 HOURS FROM 26/07/17 AT 0600UTC TO 26/07/18 AT 0600UTC
WAM (30S/40S, 50E/65E)
FRONTAL RAIN AND SHOWERS.
WIND : OVER NORTHERN : NE OR N 4 OR 5, BECOMING NW 4 TO 5 LOCALLY 6 BY
WESTERN LATER.
OVER SOUTHERN : NW 5 OR 6 WITH GUSTS AHEAD OF THE FRONT BACKING
SOUTHERLY 2 TO 4 BEHIND THE FRONT, THEN CLOCKWISE 5 TO 6 BY
WESTERN AT THE END.
SEA : MODERATE TO ROUGH.
VIS : POOR WITH PRECIPITATION.
AMS (30S/40S, 65E/80E)
FEW SHOWERS THE, RAIN AND FRONTAL SHOWERS OVER SOUTH-WESTERN AT THE END.
WIND : OVER NORTHERN : ANTICLOCKWISE 2 TO 4, BECOMING NE OR N 3 OR 4
OVER WESTERN LATER.
OVER SOUTHERN : NW 5 OR 6 WITH GUSTS AHEAD OF THE FRONT BACKING S
3 TO 4 BEHIND THEN NORTHERLY 5 TO 6 BY WESTERN AT THE END.
SEA : MODERATE OR ROUGH. SSW SWELL 2 TO 3 METERS.
VIS : POOR WITH PRECIPITATION.
CRO (40S/50S, 50E/65E)
FRONTAL RAIN AND SHOWERS OVER NORTH-EASTERN AT FIRST THEN OVER NORTH-WESTERN TONIGHT.
WIND : NW 6 OR 7 AHEAD OF THE FRONT, BACKING WESTERLY 5 OR 6 BEHIND.
DECREASING SOUTHERLY 3 OR 4 LATER THEN E 5 TO 7 LOCALLY 8 WITH
GUSTS OVER NORTH-WESTERN AT THE END.
SEA : ROUGH TO VERY ROUGH. W SWELL 3 OR 5 METERS OVER SOUTHERN.
VIS : POOR WITH PRECIPITATION.
KER (40S/50S, 65E/80E)
FRONTAL RAIN AND SHOWERS.
WIND : NW 5 OR 6 LOCALLY 7 WITH GUSTS WITH THE FRONT BACKING SW 4 TO
5 LOCALLY 6 BEHIND.
SEA : ROUGH TO VERY ROUGH. SW THEN W SWELL 2 TO 4 METERS.
VIS : POOR WITH PRECIPITATION.=