WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
08TH OF JULY 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 081000 TO 091000 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. ST HELENA: SW to W 35 in the extreme south-central parts at first.
2. TRISTAN: Cyclonic 35 to 45 in the west at first.
3. CAPE EAST: SW to S 35 to 40 in the extreme south-west.
4. MARION FORTIES EAST: Cyclonic 35 to 45 in the north-west drifting to the
north-east until mid-period, but W to SW 35 to 45 in
the north-west from mid-period.
SYNOPTIC CHART 06:00Z
=====================
High 1036 hPa 33s63e.
Low 998 hPa 42s31e.
1. Cold Front: 20s10w 27s05w 30s09w 35s06w into 32s13w.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 10 to 20 but variable 05 to 10 in the south-west.
VIS : Good.
SEA STATE: 3.0m in the south-west from mid-period, with S swell.
ANGOLA (06S/15S, 00E/00N):
WIND : SW 05 to 10 in the east, otherwise S to SE 10 to 20.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : Variable 05 to 15 in the north, otherwise N to NW 15 to 25 but SW
to W 20 to 30 in the south-west spreading to the south-east from
mid-period while reaching 35 in the extreme south-central at
first.
VIS : Good in the north, otherwise moderate in showers and
thundershowers but poor in the extreme south-east until mid-
period.
SEA STATE: 4.0 to 5.0m, except in the north-east, reaching 5.5 to 6.5m in the
south-west until mid-period, with S to SW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : N to NE 10 to 15 in the south-west while becoming variable 05 to
10 from mid-period, otherwise S to SE 10 to 20.
VIS : Good.
SEA STATE: 3.0m in the south subsiding from mid-period, with S to SW swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Cyclonic 25 to 35 reaching 40 to 45 in the south-west at first. It
will become NE to E 15 to 25 in the east from mid-period.
VIS : Moderate to poor in showers and thundershowers.
SEA STATE: 4.0 to 5.0m reaching 5.5 to 6.5m but 7.0 to 8.0m in the south-west
until mid-period. It will subside 3.5 to 4.5m by the end of the
period, with SE to E swell but NW swell in the north-east.
CAPE WEST (30S/40S, 00E/20E):
WIND : SW 15 to 25 in the south-east, otherwise NE to E 15 to 25 reaching
30 in the south-west.
VIS : Good but moderate to poor in showers and thundershowers in the
west.
SEA STATE: 3.0 to 4.0m, reaching 5.0m in the south-east, with SW to S swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NW 20 to 30 in the central and eastern parts, otherwise SW to
S 20 to 30 spreading to the east towards mid-period, while
reaching 35 to 40 in the extreme south-west.
VIS : Good in the north at first, otherwise moderate to poor in showers
and thundershowers.
SEA STATE: 3.0 to 4.0m reaching 4.5 to 5.5m in the south but 6.0 to 7.0m in
the south-west from mid-period, with SW swell but NW swell in the
east.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : NE to E 10 to 20 in the north, otherwise N to NW 10 to 20,
becoming SW to S 15 to 25 in the south-west from mid-period.
VIS : Good becoming moderate to poor in showers and thundershowers in
the extreme south-west towards the end of the period.
SEA STATE: 3.0 to 3.5m in the extreme south-west from mid-period, with SW
swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 05 to 15 in the north, otherwise variable 05 to 10.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 15 to 25, becoming variable 05 to 10 in the west from mid-
period.
VIS : Moderate in showers and rain.
SEA STATE: 3.0 to 4.0m subsiding from mid-period, with SE to S swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Cyclonic 35 to 45 in the north-west drifting to the north-east
until mid-period, otherwise W to SW 20 to 30 reaching 35 to 45 in
the north-west from mid-period.
VIS : Moderate to poor in showers and rain but poor in snow-showers in
the south.
SEA STATE: 4.0 to 5.0m reaching 5.5 to 6.5m but 7.0 to 8.0m in the north-west
towards the end of the period, with W to SW swell.
AREA 2:
=======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA
ACK (AMSTERDAM-CROZET-KERGUELEN)
2026/07/08 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE CONTINUING OVER SOUTHERN KER AT FIRST, THEN EXPECTED OVER
WESTERN AT END.
- GALE EXPECTED OVER FAR SOUTHERN WAM AT END.
- GALE TO SEVERE GALE EXPECTED OVER CRO LATER, LOCALLY STORM OR
VIOLENT STORM OVER SOUTHERN AT END.
PART 2: GENERAL SYNOPSIS, 26/07/08 AT 0000UTC
- FRESH OR STRONG DISTURBED WESTERLY FLOW OVER CRO AND KER.
- HIGH 1035 OVER WAM NEAR 33S/60E AT 18 UTC, SLOWLY MOVING EASTWARDS,
EXPECTED 1033 OVER AMS NEAR 32S/71E AT 18UTC, THEN 1035 HPA NEAR
33S/77E AT END.
- LOW EXPECTED 965 HPA NEAR 48S/52E AT 00 UTC, THEN 956 HPA NEAR
51S/58E AT END. ASSOCIATED COLD FRONT AXIS NW/SE CROSSING CRO LATER.
PART 3: FORECAST FOR 24 HOURS FROM 26/07/08 AT 0600UTC TO 26/07/09 AT
0600UTC
WAM (30S/40S, 50E/65E)
FEW SHOWERS, THEN FRONTAL RAIN AND SHOWERS OVER FAR SOUTHWESTERN AT
END.
WIND: IN NORTH: ANTICLOCKWISE 3 OR 4, INCREASING NW 4 TO 6 FROM NORTH TO
SOUTH LATER. IN SOUTH : NORTHWEST 5 OR 6, GRADUALLY INCREASING 6 OR 7,
LOCALLY 7 OR 8 OVER FAR SOUTHERN AT END. SEVERE GUSTS.
SEA: MODERATE OR ROUGH, BECOMING ROUGH OR VERY ROUGH IN FAR SOUTH AT
END
VIS: POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
FEW SHOWERS.
WIND: ANTICLOCKWISE 2 TO 4, BUT NW 5 OR 6 OVER FAR SOUTHERN, LOCALLY
INCREASING 56 OR 7 WITH GUSTS OVER FAR SOUTHWESTERN AT END.
SEA: MODERATE OR ROUGH, LOCALEMENT VERY ROUGH OVER FAR SOUTHWESTERN
AT END.
VIS: LOCALLY MODERATE IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
RAIN OR SHOWERS.
WIND : IN NORTH : NW 5 OR 6, GRADUALLY INCREASING 7 OR 8 LATER, BACKING 5
OR 6 BEHIND THE FRONT OVER FAR NORTHWESTERN AT END. SEVERE GUSTS.
- IN SOUTH : W 6 OR 7, TEMPORARILY ANTICLOCKWISE 3 OR 4 OVER NORTHERN
SOON, INCREASING NW 7 OR 8 LATER, BACKING W 8 OR 9, LOCALLY 10 OR 11
BEHIND THE FRONT AT END. VIOLENT GUSTS.
SEA: ROUGH OR VERY ROUGH, LOCALLY HIGH OVER SOUTHERN, BECOMING VERY
HIGH OR ROUGH AT END. SW SWELL 4 TO 6 METERS.
VIS: POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
RAIN OR SHOWERS.
WIND: WEST OR NORTHWEST 6 OR 7, AT TIMES 8 OVER SOUTHERN AT FIRST,
INCREASING 7 OR 8 OVER WESTERN AT END. SEVERE GUSTS.
SEA: ROUGH OR VERY ROUGH, BECOMING LOCALLY HIGH LATER OVER FAR
SOUTHERN, THEN OVER WESTERN AT END. SW SWELL INCREASING 5 OR 6 M OVER
SOUTHERN LATER THEN OVER SOUTHERN AT END.
VIS: POOR IN PRECIPITATION.