WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
30TH 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 302200 TO 012200 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 in the north-west, spreading to the central
parts from mid-period, as well as southern parts by the
end of the period, while moderating in the north-west.
2. MARION FORTIES EAST: W to SW 35 in the southern parts at times.
SYNOPTIC CHART 12:00Z
=====================
High 1030 hPa 32s15w, High 1037 hPa 38s78e
Low 1018 35s02w hPa Low 962 hPa 54s28w, Low 954 hPa 60s66e.
1. Cold Front: 27s10w 30s02w into 35s02w
2. Cold Front: 27s37w 33s30w 38s24w 43s20w 50s20w into 54s28w.
3. Cold Front: 32s46e 37s49e 43s54e 48s61e 52s70e into 60s66e.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 15 to 25, reaching 30 in places in the west and south-west
at times.
VIS : Moderate in light rain and showers in places.
SEA STATE: 3.0 to 3.5m in the central and west, spreading to the east towards
the end of the period, 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
in the south from the morning.
VIS : Good.
SEA STATE: 3.0 to 3.5m in the south towards mid-period, with S to SW swell.
ST HELENA (15S/30S, 00E/20W):
WIND : Anti-cyclonic 05 to 15 in the south, but SW 10 to 20 in the
south-east at first, otherwise E to SE 15 to 25.
VIS : Moderate in showers and rain in places in the north, but moderate
in showers and thundershowers in the south-east at first.
SEA STATE: 3.0 to 4.0m in the north and south-east, with S to SE swell, but
SW in the south-east.
TRADES (15S/30S, 00E/WEST COAST):
WIND : Anti-cyclonic 05 to 15 in the south, otherwise S to SE 15 to 25,
reaching 30 in the north-east.
VIS : Good, but moderate in showers and thundershowers in the south-west
at first.
SEA STATE: 3.0 to 3.5m in the north and eastern parts, as well as over the
south-west towards mid-period, with S to SW swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Anti-cyclonic 05 to 15, but N to NW 15 to 25 in the west, reaching
30 in the south-west at first, spreading to the south from mid-
period, as well as central and south-east by the end of the
period.
VIS : Good, but moderate in showers and rain in the west and south-west,
spreading to the south from the morning, while clearing in the
south-west from mid-period.
SEA STATE: 3.0 to 4.0m, with S to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : S to SW 15 to 25 in the south-east, but cyclonic 15 to 25 in the
south-west, otherwise anticyclonic 05 to 15.
VIS : Moderate in showers and rain in places, but good in the north.
Clearing in the west from the afternoon.
SEA STATE: 3.0 to 3.5m in the east and north-west, with SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : Anti-cyclonic 05 to 15, but cyclonic 15 to 25 in the west,
reaching 30 to 35 in the north-west, spreading to the central
parts from mid-period, as well as southern parts by the end of the
period, while moderating in the north-west.
VIS : Good, but moderate to poor in showers and thundershowers in places
in the western half, spreading to the central parts from mid-
period.
SEA STATE: 3.0 to 4.0m, reaching 4.5m in the south-east at first, with SW
swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Anti-cyclonic 05 to 15, but N to NE 15 to 25 in the west and
south-west, reaching 30 in the south-west.
VIS : Moderate in showers and rain in places in the west and south-west,
but moderate in showers and thundershowers in the south-east until
in the afternoon, otherwise good.
SEA STATE: 3.0 to 3.5m in the east, and in places in the southern half, with
SE in the east, but NE in the south-west, otherwise S to SW.
MOZAMBIQUE CHANNEL:
WIND : N to NE 05 to 15 in the south-west, spreading to the west from
mid-period, otherwise S to SE 10 to 20.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : Variable 05 to 10 in the south, otherwise S to SE 15 to 25.
VIS : Good, but moderate in showers and rain in the north.
SEA STATE: 3.0m in the south-east, with SE swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Anti-cyclonic 05 to 15 in the northern parts, otherwise W to
SW 15 to 25, reaching 30 to 35 in the southern parts at times.
VIS : Good, but moderate in snow-showers and rain in the south,
spreading to the central and northern parts from the morning.
SEA STATE: 3.5 to 4.5m, reaching 5.0 to 7.0m in the central and south, with W
to SW swell.
AREA 2:
=======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA
ACK (AMSTERDAM-CROZET-KERGUELEN)
26/06/30 AT 1700UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE EXPECTED OVER SOUTHEASTERN KER SOON.
- GALE EXPECTED OVER SOUTHEASTERN WAM AT END.
- GALE EXPECTED OVER NORTHEASTERN CRO AT END.
PART 2: GENERAL SYNOPSIS, 26/06/30 AT 1200UTC
- HIGH 1037 HPA NEAR 38S/79E, MOVING EAST-NORTH-EASTWARD 20 KT.
- COLD FRONT AXIS 31S/43E, 40S/51E, 50S/65E MOVING EASTWARD 20 KT.
- DEEPENING LOW, EXPECTED 1011 HPA NEAR 40S/59E AT 06UTC, THEN 1002
HPA NEAR 40S/63E AT 18UTC.
- SQUALLY WEATHER OVER NORTHERN AMS WITH A DEEPENING LOW AT FIRST,
EXPECTED 1013 HPA NEAR 31S/69E AT 00UTC, THEN 1006 HPA NEAR 34S/70E
AT 18UTC.
PART 3: FORECAST FOR 24 HOURS FROM 26/06/30 AT 1800UTC TO 26/07/01
AT 1800UTC
WAM (30S/40S, 50E/65E)
FRONTAL SHOWERS AND RAIN.
WIND : OVER NORTHERN AREA : VARIABLE 2 OR 3, GRADUALLY BECOMING BY
WESTERN NW 4 OR 5 AHEAD THE FRONT AND SW 4 BEHIND THE FRONT. OVER
SOUTHERN AREA : NW 5 OR 6 AHEAD THE FRONT; BACKING S 6 OR 7, THEN 7
OR 8 OVER SOUTHEASTERN BEHIND THE FRONT, AND DECREASING 3 OR 4 OVER
WESTERN AT END. SEVERE GUSTS.
SEA: ROUGH. E SWELL 2 TO 3 METERS AHEAD THE FRONT, SW SWELL 2 TO 3
METERS BEHIND.
VISI: POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SQUALLS AND SHOWERS OVER NORTHERN, SPREADING OVER THE ALL AREA LATER.
WIND: E TO NE 6 OR 7 OVER NORTHERN AND N TO NE 4 OR 5 OVER SOUTHERN,
BECOMING CLOCKWISE 5 OR 6, AT TIMES 7 OVER NORTHWESTERN LATER, THEN
OVER THE CENTRAL AREA AT END. SEVERE GUSTS.
SEA: MODERATE TO ROUGH OVER SOUTHERN, ROUGH TO VERY ROUGH OVER
NORTHERN, BECOMING ROUGH OVER THE ALL AREA AT END. ARRIVAL OF A NE
SWELL 2 METERS AND A HALF TO 3 METERS AT END.
VISI: POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
FRONTAL RAIN AND SHOWERS.
WIND: OVER NORTHERN : NW 6 OR 7 AHEAD THE FRONT, BACKING S 5 OR 6
BEHIND THE FRONT, INCREASING 7 OR 8 OVER NORTHEASTERN AND DECREASING
3 OR 4 OVER NORTHWESTERN AT END. SEVERE GUSTS. OVER SOUTHERN : W TO
SW 6 OR 7, DECREASING 4 TO 6 FROM NORTHERN TO SOUTHERN LATER. GUSTS.
SEA: ROUGH TO VERY ROUGH OVER NORTHERN, VERY ROUGH TO HIGH OVER
SOUTHERN. SW SWELL 3 TO 5 METERS.
VISI: POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
FRONTAL RAIN AND SHOWERS OVER SOUTHWESTERN, SPREADING OVER THE ALL
AREA LATER.
WIND: NW 5 TO 7 FROM NORTHERN TO SOUTHERN, AT TIMES 8 OVER FAR
SOUTHEASTERN SOON, BACKING S 4 OR 5 BEHIND THE FRONT BUT W 5 OR 6
OVER FAR SOUTHERN. SEVERE GUSTS.
SEA: ROUGH TO VERY ROUGH FROM NORTHERN TO SOUTHERN. SW SWELL 3 OR 4
METERS.
VISI: POOR IN PRECIPITATION.=