WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
16TH OF JUNE 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:
=======
FORECAST VALID FROM 161000 TO 171000 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. TRADES : S to SE 35 in the north-east from the evening, as well as
south-east from mid-period.
2. CAPE WEST : S to SE 35 in the north-east from the evening.
3. CAPE EAST: Cyclonic 35 to 40 in the east and south-east until
tomorrow morning.
4. MARION FORTIES EAST: W to NW 35 to 40 in the southern parts
until mid-period, but SW 35 in places in the
north from the morning.
SYNOPTIC CHART 06:00Z
=====================
High 1032 hPa 34s01w, High 1028 hPa 33s53e
Low 1011 hPa 39s42e, Low 983 hPa 47s07w
1. Cold Front: 32s40e 35s42e 38s43e into 39s42e.
2. Cold Front: 24s28e 29s22w 36s16w 40s11w into 47s07w.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 15 to 25.
VIS : Good.
SEA STATE: 3.0 to 4.0m, with SE swell.
ANGOLA (06S/15S, 00E/00N):
WIND : SW 05 to 15 in the east, otherwise S to SE 10 to 20, reaching
25 to 30 in the south and south-east.
VIS : Good.
SEA STATE: 3.0 to 4.0m central, west and southern parts, with SE swell.
ST HELENA (15S/30S, 00E/20W):
WIND : N to NE 15 to 25 in the west and south-west, otherwise E to SE
15 to 25, reaching 30 in places in the north-east.
VIS : Good but moderate to poor in showers and thundershowers in the
extreme south-west.
SEA STATE: 3.0 to 4.0m, except in the south-east, with E to SE swell, but
NE in the south-west.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 15 to 25, reaching 30 in the south and northern parts,
but 35 in the north-east from the evening, as well as south-
east from mid-period.
VIS : Good, but moderate in thundershowers in the south-east.
SEA STATE: 3.0 to 4.0m in the south-east, central and northern parts,
with SE swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Anticyclonic 05 to 15 in the east, otherwise N to NW 15
to 25, reaching 30 in places in the central and southern parts
until tomorrow morning.
VIS : Good, but moderate to poor in showers and thundershowers in
the west, central and southern parts.
SEA STATE: 3.0 to 4.0m in the south and west, reaching 4.5m in the south-
west until mid-period, with N to NW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : W to NW 15 to 25 in the south and south-west, but anti-
cyclonic 05 to 15 in the west, otherwise S to SE 15 to 25, but
30 in the north-east reaching 35 from the evening.
VIS : Good, but moderate in showers and thundershowers in places in
the north-east, but moderate in showers and rain in the south-
west by the end of the period.
SEA STATE: 3.0 to 3.5m in the south and north-east, reaching 4.0m in the
north-east from this evening, with SW swell, but SE in the
north-east.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Anti-cyclonic 05 to 15 in the west, but cyclonic 15 to 25 in
the east, reaching 30 to 40 in the east and south-east until
tomorrow morning, otherwise, W to SW 15 to 25 reaching 30 in
places in the south.
VIS : Good, but moderate to poor in showers and thundershowers in
the east until tomorrow morning. It will become moderate in
showers and rain in the south from tomorrow morning.
SEA STATE: 3.0 to 4.0m, in the east and southern parts, reaching 4.5 to
5.0m in the east from this afternoon, as well as southern
parts from tomorrow morning, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Anti-cyclonic 05 to 15 in the west, but E to NE 05 to 15 in
the east, otherwise W to SW 10 to 20, reaching 25 to 30 in the
south-east.
VIS : Good, but moderate to poor in showers and thundershowers in
the south-east, but moderate in showers and rain in the north-
west.
SEA STATE: 3.0 to 3.5m in the east and southern parts, with S to SW
swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 05 to 15, reaching 20 to 25 in the north and south-
east at times.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 10 to 20, reaching 25 to 30 in the extreme north-west.
It will become variable 05 to 10 in the south from tomorrow
morning.
VIS : Good in the central parts, otherwise moderate in showers and
rain in places.
SEA STATE: 3.0m in the extreme south-east and north-west, with S to SE
swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to NW 20 to 30, reaching 35 to 40 in the southern parts
until mid-period. It will become SW 15 to 25 in the south from
mid-period, spreading to the north from the morning, while
reaching 35 in places in the north.
VIS : Moderate to poor in showers and thundershowers over the north-
eastern parts until in the evening, but moderate in showers
and rain in the southern half, spreading to the north from
tomorrow morning.
SEA STATE: 3.0 to 4.0m, reaching 5.0 to 6.0m in the southern half,
spreading to the north from tomorrow morning, but 6.5 to 7.0m
in the south-east until mid-period, with W to SW swell.
AREA 2:
=======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/06/16 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- STRONG GALE CURRENTLY AFFECTING OVER FAR SOUTHERN CRO.
- GALE EXPECTED OVER SOUTHERN KER.
- GALE EXPECTED OVER WAM.
PART 2: GENERAL SYNOPSIS, 26/06/16 AT 0000UTC
- HIGH-PRESSURE SYSTEM AT 1029 HPA NEAR 33OS/60OE, MOVING EASTWARDS.
- A FAST-MOVING WESTERLY FLOW OVER CRO AND KER.
- A DISTURBANCE IS EXPECTED TO ARRIVE FROM THE WEST OVER WAM OVERNIGHT.
PART 3: FORECAST FOR 24 HOURS FROM 26/06/16 AT 0600UTC TO 26/06/17 AT 0600UTC
WAM (30S/40S, 50E/65E)
SCATTERED SHOWERS WILL BECOME MORE FREQUENT IN THE SOUTH, FOLLOWED BY RAIN AND THUNDERSTORMS IN THE WEST OVERNIGHT, BROUGHT BY A NEW DISTURBANCE.
WIND : ANTICLOCKWISE 3/4 OVER NORTHERN, INCREASING WESTERLY 4/5 OVER
SOUTHERN, OCCASIONALLY 6 WITH GUSTS. THEN NORTH-WESTERLY 5/6, LOCALLY
7/8 OVER WESTERN REGION AHEAD OF A NEW WARM FRONT AND LOCALLY
CLOCKWISE 5 TO 7 OVER SOUTH-WESTERN REGION TOWARDS THE END OF THE
PERIOD, INCREASING WESTERLY 6/7 OVER NORTH-WESTERN REGION.
SEA : ROUGH TO VERY ROUGH DUE TO A SOUTH-WESTERLY SWELL OF 3 TO 4 M,
GRADUALLY ABATING.
VIS : POOR DUE TO RAINFALL.
AMS (30S/40S, 65E/80E)
SCATTERED SHOWERS, MORE FREQUENT OVER FAR NORTHERN AND FAR SOUTHERN.
WIND : ANTICLOCKWISE 3/4, FRESHENING WESTERLY 4/5 OVER SOUTHERN AREAS.
SEA : ROUGH TO VERY ROUGH DUE TO A SOUTH-WESTERLY SWELL OF 3 TO M,
GRADUALLY SUBSIDING.
VIS : POOR DURING RAINFALL.
CRO (40S/50S, 50E/65E)
SHOWERS, SNOWY OVER FAR SOUTHERN AND RAIN AND THUNDERSTORMS OVER FAR NORTH-WESTERN TOWARDS THE END OF THE PERIOD.
WIND : WESTERLY, FORCE 5 TO 7 FROM NORTH TO SOUTH, OCCASIONALLY FORCE
8/9 IN THE SOUTH. GUSTS. BECOMING LOCALLY LOW-PRESSURE IN THE FAR
NORTH-WEST TOWARDS THE END OF THE FORECAST PERIOD.
SEA : ROUGH TO VERY ROUGH. SOUTH-WESTERLY SWELL OF 4 TO 5 M, COMBINED WITH
HEAVY WIND-DRIVEN SEAS.
VIS : POOR TO VERY POOR DURING PRECIPITATION.
KER (40S/50S, 65E/80E)
SHOWERS, SNOWY OVER FAR SOUTHERN.
WIND : WESTERLY 5 TO 7 FROM NORTH TO SOUTH AT TIMES 8 OVER SOUTHERN.
GUSTS.
SEA : VERY ROUGH TO HIGH. WESTERLY SWELL 3 TO 5 M.
VIS : POOR OR VERY POOR IN PRECIPITATION.