WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
13TH 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 131000 TO 141000 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: W to SW 35 to 40 in the south-east until mid-period.
2. MARION FORTIES EAST: W to SW 35 to 40, reaching 45 to 55 in the south-
east until mid-period, while moderating in the
west, but in the east towards the end of the
period.
SYNOPTIC CHART 06:00Z
=====================
High 1036 hPa 37s06w, High 1030 hPa 38s17e
Low 971 hPa 50s48e
1. Cold Front: 32s31e 35s39e 40s46e 45s50e into 50s48e
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 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,
reaching 25 in the south by mid-period.
VIS : Good.
SEA STATE: 3.0m in the south by mid-period, with S to SE swell.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 10 to 20, but NE to N 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, with E to NE swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 10 to 20, reaching 25 in the northern and central
parts.
VIS : Good.
SEA STATE: 3.0 to 3.5m in the northern parts, spreading to the southern
parts by mid-period, with S swell.
TRISTAN (30S/40S, 00E/20W):
WIND : NE 15 to 25 in the north-west, otherwise anticyclonic 05
to 15 but NW 15 to 25 in the south-west.
VIS : Good.
SEA STATE: 3.0m in the extreme west by the end of the period, with N to
NW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : E to NE 10 to 20 in the east and south-east until mid-period,
otherwise S to SE 10 to 20, but SW 15 to 25 in the south-west,
spreading to the central parts towards the end of the period,
while reaching 30 in the south-east.
VIS : Good, but moderate in showers and thundershowers in the south-
east.
SEA STATE: 3.0 to 3.5m, reaching 4.0 to 5.0m in the south-east until mid-
period, with SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to SW 15 to 25 reaching 30 to 40 in the south-east until
mid-period, but E to SE 10 to 20 in the north-west, where it
will become NE 05 to 15 towards the end of the period.
VIS : Good, but moderate in showers and thundershowers in the east
and north-west, but in the west towards the end of the period.
SEA STATE: 3.0 to 4.0m, reaching 5.0 to 7.0m over the central and
southern parts, drifting to the south-eastern parts towards
the end of the period, with SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : W to SW 15 to 25, becoming E to NE 15 to 25 in the west
towards mid-period.
VIS : Good, but moderate in showers and thundershowers in the west,
spreading to the central parts towards the end of the period.
SEA STATE: 3.0 to 3.5m in the south and west, reaching 4.0 to 6.0m in the
south-west until mid-period, with S to SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 20.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : Variable 05 to 10 in the south, otherwise E to SE 05 to 15.
VIS : Moderate in showers and thundershowers in places.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : W to SW 30 to 40, reaching 45 to 55 in the south-east until
mid-period, while moderating to 20 to 30 in the west,
spreading to the east towards the end of the period.
VIS : Moderate in showers and rain, but with snow over the southern
parts.
SEA STATE: 5.0 to 7.0m, subsiding to 4.0m in the west towards the end of
the period, 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)
2026/06/13 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALES EXPECTED OVER KER.
- STORM EXPECTED OVER FAR SOUTHERN CRO.
PART 2: GENERAL SYNOPSIS, 2026/06/13 AT 0000UTC
- HIGH 1032 HPA NEAR 32S/79E MOVING SLOWLY EASTWARD .
- DEEPENING LOW , 969 HPA, NEAR 47S/40E, MOVING SOUTHEASTWARD 30 KT, WITH
COLD FRONT AXIS 33S/32E, 38S/40E, 45S/43E, 49S/42E.
- FILLING LOW 1012 HPA OVER NORTHWESTERN WAM AT FIRST.
PART 3: FORECAST FOR 24 HOURS FROM 2026/06/13 AT 0600UTC TO 2026/06/14 AT 0600UTC
WAM (30S/40S, 50E/65E)
FRONTAL RAIN AND SHOWERS. SQUALLS.
WIND: N OR NW 4 TO 6 AHEAD THE FRONT AND BACKING SW 5/6 AT TIMES 7 BEHIND.
GUSTS.
SEA : MODERATE TO ROUGH BECOMING VERY ROUGH LOCALLY HIGH OVER SOUTH-WEST.
ARRIVAL OF A SW SWELL UNTIL 5 M LATER.
VIS : POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SQUALLY WEATHER OVER NORTHWESTERN AT FIRST. FRONTAL RAIN AND SHOWERS OVER SOUTHWESTERN AT END.
WIND: ANTICLOCKWISE 3 TO 5, INCREASING NW 5/6 WITH GUSTS OVER WESTERN AREA
LATER.
SEA : MODERATE TO ROUGH. SOUTH-WESTERLY SWELL 2 TO 3 M ABATING.
VIS : POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
FRONTALES RAIN AND SHOWERS.
WIND: NW 6 TO 7 AHEAD THE FRONT BACKING 7/8, LOCALLY 9/10 OVER FAR SOUTHERN
AREA BEHIND. SEVERE GUSTS.
SEA : ROUGH TO VERY ROUGH BECOMING HIGH SOON. WESTERLY SWELL 2 TO 4 M, CROSS-
SWELL WITH HEAVY WIND SEA.
VIS : POOR OR VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
FRONTAL RAIN AND SHOWERS.
WIND: INCREASING NW 5/6 AT TIME 7 AHEAD THE FRONT AND BACKING W 6 TO 7
LOCALLY 8OVER SOUTHERN AREA . GUSTS.
SEA : ROUGH TO VERY ROUGH, HIGH IN SOUTHWEST AT END. W SWELL 2 TO 4 METERS.
VIS : POOR OR VERY POOR IN PRECIPITATION.