WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
27TH OF JUNE 2026 AT 17:00 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 272200 TO 282200 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 WEST : W to NW 35 to 40 in the south-east until mid-period.
2. CAPE EAST: W to NW 35 to 40 in the west.
3. MARION FORTIES EAST: N to NW 35 in the north-west and south.
SYNOPTIC CHART 12:00Z
=====================
High 1032 hPa 45s30w, High 1034 hPa 41s55e
Low 1000 hPa 44s05e, low 948 hPa 65s22e
1. Cold Front: 32s01e 42s20w 52s30e 60s51e into 65s22e.
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : SE 15 to 25.
VIS : Good, but moderate in showers and rain in places.
SEA STATE: 3.0 to 3.5m in the east, with SE swell.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20, but S to SW 05 to 15 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : Variable 05 to 10 in places in the south, otherwise S to SE 15 to
25.
VIS : Good, but moderate in showers and rain in the central south.
SEA STATE: 3.0 to 4.0m in the north-west and extreme south with E to SE
swell, but with SW swell in the south.
TRADES (15S/30S, 00E/WEST COAST):
WIND : SW to W 10 to 20 in the extreme south, otherwise S to SE 10 to 20,
but variable 05 to 10 in the south-east.
VIS : Good, but moderate in showers and rain in the south-east by the
end of the period.
SEA STATE: 3.0 to 4.0m in the south, with SW swell, but SE swell in the
north.
TRISTAN (30S/40S, 00E/20W):
WIND : SW to S 15 to 25 in the east until mid-period reaching 30,
otherwise Anticyclonic 05 to 15, becoming NW to N 20 to 30 in the
south-west from mid-period.
VIS : Good, but moderate in showers and rain in the east at first and in
the south-west by the end of the period.
SEA STATE: 3.5 to 4.5m reaching 5.0 to 5.5m in the east, with W to SW swell,
becoming NW swell in the south-west by the end of the period.
CAPE WEST (30S/40S, 00E/20E):
WIND : W to NW 15 to 25 in the east until mid-period while reaching 30 to
40 in the south-east until mid-period, otherwise S to SW 15 to 25
reaching 30 in places.
VIS : Moderate in showers and thundershowers, clearing in the west by
mid-period.
SEA STATE: 3.0 to 3.5m north-east, otherwise 4.0 to 5.0, reaching 6.0 to 7.0m
in the south, with W to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NE 15 to 25 in the east reaching 30, otherwise W to NW 15 to
25 reaching 30 in places, but 35 to 40 in the west, becoming SW 20
to 30 in the extreme west towards the end of the period.
VIS : Good, but moderate in showers and rain in the central parts and in
the south-west, spreading to the west by mid-period.
SEA STATE: 3.0 to 4.0m, reaching 5.0 to 6.0m in the west from mid-period, but
6.5m in the south-west by mid- period, with W to SW swell, but NW
swell in places in the central parts.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : NE to E 10 to 20 reaching 25 in places.
VIS : Good in the south-west, otherwise moderate in showers and rain in
places.
SEA STATE: 3.0 to 3.5m, except in the north-west, with S to SE swell.
MOZAMBIQUE CHANNEL:
WIND : NE 05 to 15 in the south-west, otherwise S to SE 10 to 20,
reaching 25 in the extreme south-east at first.
VIS : Good, but moderate in showers and rain in places in the west.
SEA STATE: 3.0m in the extreme south-east until mid-period, with SE
swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 15 to 25 reaching 30 in the north-east.
VIS : Good, but moderate in showers and rain in places.
SEA STATE: 3.0m in the north-west and south, with SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : N to NW 15 to 25 reaching 30 to 35 in the north-west and south.
VIS : Good, but moderate in showers and rain in places.
SEA STATE: 3.0 to 4.0m, reaching 4.5 to 5.0m in the south, spreading to the
west by the end of the period, 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)
26/06/27 AT 1600UTC
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, 26/06/27 AT 1200UTC
- COLD FRONT CF AXIS 34S/75E, 36S/80E, 40S/84E, MOVING EASTWARDS.
- HIGH-PRESSURE SYSTEM AT 1037 HPA NEAR 42S/58E, FORECAST TO REACH
1042 HPA NEAR 41S/69E BY THE END.
PART 3: FORECAST FOR 24 HOURS FROM 26/06/27 AT 1800UTC TO 26/06/28
AT 1800UTC
WAM (30S/40S, 50E/65E)
SCATTERED SHOWERS OVER FAR NORTHERN OF THE AREA.
WIND : ANTICLOCKWISE FORCE 2 TO 4 OVER SOUTHERN, INCREASING EAST
FORCE 4 TO 6 OVER NORTHERN.
SEA : MODERATE TO ROUGH. A LONG SOUTH-WESTERLY SWELL OF 3 TO 4 M,
ABATING 2 TO 3 METERS
VIS : GOOD.
AMS (30S/40S, 65E/80E)
FRONTAL SHOWERS OVER EASTERN REGION INITIALLY, FOLLOWED BY SCATTERED
SHOWERS OVER FAR NORTHERN.
WIND : SHIFTING TO SOUTH-SOUTH-EASTERLY, FORCE 4 TO 5, BEHIND THE
COLD FRONT, THEN ANTICLOCKWISE, FORCE 2 TO 4 OVER SOUTHERN,
FRESHENING EAST FORCE 4 TO 6 LOCALLY 7 OVER NORTHERN.
SEA : MODERATE TO ROUGH. LONG SWELLS FROM THE SOUTH-WEST, 3 M,
SUBSIDING TO 2 TO 3 M.
VIS : POOR DURING RAINFALL, THEN GOOD.
CRO (40S/50S, 50E/65E)
SHOWERS OVER SOUTH-WESTERN TOWARDS THE END.
WIND : ANTICLOCKWISE FORCE 2 TO 4 OVER NORTHERN AND NORTH-WESTERLY,
FORCE 5 TO 6 WITH GUSTS OVER SOUTHERN, THEN NORTH-WESTERLY, FORCE
TO 7 LATER ACROSS THE WHOLE AREA.
SEA : ROUGH TO VERY ROUGH, BECOMING MODERATE TO ROUGH. SOUTH-WESTERLY
SWELL OF 2 TO 4 M, SUBSIDING FROM NORTH TO SOUTH.
VIS : GOOD, THEN POOR DURING RAINFALL.
KER (40S/50S, 65E/80E)
SCATTERED SHOWERS OVER THE EASTERN REGION.
WIND : SOUTH-WESTERLY, FORCE 5 TO 6, BECOMING ANTICLOCKWISE, FORCE 3
TO 4 OVER NORTHERN; FRESHENING TO WESTERLY, FORCE 5 TO 7 OVER
SOUTHERN REGION.
SEA : ROUGH TO VERY ROUGH. SOUTH-WESTERLY SWELL, 2 TO 4 M, SUBSIDING.
VIS : POOR DURING RAINFALL, THEN GOOD