WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
12TH 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:
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FORECAST VALID FROM 121000 TO 131000 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: S to SW 35 in the south-east at first.
2. CAPE EAST: W to SW 35 to 40 over the western half, spreading over the
central parts by mid-period and the east by end of period,
while moderating from the west.
3. MARION FORTIES EAST: NW 35 in the north-west, spreading to the east
and south-east towards mid-period, while
becoming SW to W 35 to 40 from the west, reaching
50 to 60 in the south-west, that will spread to
the south-east towards end of period.
SYNOPTIC CHART 06:00Z
=====================
High 1034 hPa 39s14w, High 1032 hPa 31s78e
Low 986 hPa 48s29e, Low 1009 hPa 30s51e
1. Cold Front: 34s21e 39s28e 43s25e into 48s29e
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 10 to 20.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20, but variable 05 to 10 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 10 to 20, but NE 15 to 25 in the south-west.
VIS : Good but moderate to poor in showers and thundershowers in the
south-west.
SEA STATE: 3.0m in the south-west and central parts from mid-period, with
E to NE swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 10 to 20, reaching 25 in the north.
VIS : Good.
SEA STATE: 3.0m in the northern parts from mid-period.
TRISTAN (30S/40S, 00E/20W):
WIND : E to NE 15 to 25 in the west, otherwise anticyclonic 05
to 15 but NW 15 in the south-west and SW 10 to 20 in the
south-east as well as SE in the north.
VIS : Good.
SEA STATE: 3.0 to 3.5m in the south-east, and in the north-west from mid-
period, with SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : S to SW 15 to 25 reaching 30 to 35 in the south-east at first,
while becoming SE to E 05 to 15 in the north from mid-period.
VIS : Good, but moderate in showers and rain in the south-east.
SEA STATE: 3.0 to 4.0m, reaching 5.0 to 6.0m over the south-eastern
parts, with W to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : NW 15 to 25 reaching 30 in the central parts but W to SW 30 to
40 over the western half, spreading over the central parts by
mid-period and the east by end of period, while moderating to
15 to 25 from the west.
VIS : Good, but moderate to poor in showers and thundershowers in
the western half, spreading over the central parts by mid-
period and the east by end of period.
SEA STATE: 3.0 to 4.0m, reaching 5.0 to 7.0m in the west, spreading over
the central parts by mid-period, reaching the south-east by
end of period, while reaching 4.0 to 5.0m in the west, with SW
swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Cyclonic 15 to 25 in the south-east, otherwise S to SW 10 to
20 reaching 25 in the south-west by mid-period, but N to NW 15
to 25 in the north-west, becoming SW to W 10 to 20 in the
central and eastern parts towards end of period.
VIS : Good, but moderate to poor in showers and thundershowers in
the east, but in the south-west from mid-period.
SEA STATE: 3.0m in the east and west, becoming 4.0 to 5.0m in the south-
west towards mid-period, with cyclonic swell in the east, but
with NE swell in the west and SW in the south-west.
MOZAMBIQUE CHANNEL:
WIND : S 10 to 20, but N to NW 15 to 25 in the south-west.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : W to NW 05 to 15 in the extreme south, otherwise variable 05
to 10, but E to SE 05 to 15 in the north.
VIS : Moderate in showers and thundershowers in places.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : NW 20 to 30 reaching 35 in the north-west, spreading to
the east and south-east towards mid-period, while
becoming SW to W 30 to 40 from the west, reaching 50 to 60 in
the south-west, that will spread to the south-east towards end
of period.
VIS : Moderate to poor in showers and rain, with snow at times.
SEA STATE: 3.5 to 4.5m, becoming 5.0 to 7.0m in the west towards mid-
period, but 7.0 to 8.0m in the south spreading to the south-
east by end of period with W to NW swell becoming SW to W
swell from mid-period.
AREA 2:
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MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/06/12 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE EXPECTED OVER CRO.
PART 2: GENERAL SYNOPSIS, 26/06/12 AT 0000UTC
- HIGH-1032 NEAR 30S/78E, SLOW-MOVING.
- WAVING FRONT (CF) OVER FAR SOUTHERN CRO AND FAR SOUTHERN KER.
- FILLING THUNDERY LOW 1005 NEAR 30S/50E, SLOWLY MOVING EASTWARD, PRECEDED BY
CONVERGENCE LINES.
- COLD FRONT (CG) OVER WESTERN CRO AT END.
PART 3: FORECAST FOR 24 HOURS FROM 26/06/12 AT 0600UTC TO 26/06/13 AT 0600UTC
WAM (30S/40S, 50E/65E)
SHOWERS AND SQUALLS LOCALLY THUNDERY.
WIND: N 3/4 AT TIMES 5, BUT CLOCKWISE 4/5 OVER NORTH-WESTERN AT TIMES 6.
GUSTS WITH SQUALLS. INCREASING NW 6/7 WITH GUSTS AT END OVER FAR SOUTH-
WESTERN.
SEA : MODERATE TO ROUGH.
VIS : POOR OR VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SCATTERED SHOWERS BUT SQUALLS AT TIMES THUNDERY OVER FAR WESTERN LATER.
WIND: ANTICLOCKWISE 3/4 AT TIMES 5, INCREASING N 4/5 OVER WESTERN LATER AT
TIMES 6. GUSTS WITH SQUALLS.
SEA : MODERATE TO ROUGH.
VIS : MODERATE IN PRECIPITATION, BUT VERY POOR IN SQUALLS.
CRO (40S/50S, 50E/65E)
FRONTAL RAIN AND SHOWERS (CF) OVER FAR SOUTHERN, THEN OVER WESTERN LATER WITH CG.
WIND: NW 6/7 OVER SOUTHERN, BUT 5/6 OVER NORTHERN, INCREASING GRADUALLY 6/7
AT TIMES 8 FROM WEST. GUSTS.
SEA : ROUGH TO VERY ROUGH. W SWELL 3 TO 4M OVER SOUTHERN.
VIS : POOR OR VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
FRONTAL RAIN AND SHOWERS (CF) OVER FAR SOUTHERN.
WIND: W 4/5 OVER NORTHERN BUT 6/7 OVER SOUTHERN, VEERING NW 5/6 OVER WESTERN
LATER AT TIMES 7. GUSTS.
SEA : ROUGH TO VERY ROUGH. SOUTH-WESTERLY SWELL 3 TO 4M.
VIS : POOR IN PRECIPITATION.