WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
05TH OF JULY 2026 AT 08:30 UTC.
FOR SOUTH-EAST SECTOR OF METAREA. VII, PREPARED BY REUNION, SEE AREA 2
BELOW.
NOTE: WX OBSERVATIONS.
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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 051000 TO 061000 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:
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1. TRISTAN: SE 35 in the west towards the end of the period.
SYNOPTIC CHART 06:00Z
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High 1022 hPa 22s01e, High 1026 hPa 28s39e, High 1024 hPa 42s44e
Low 957 hPa 52s13e
1. Cold Front: 28s00e 35s11e 40s16e 45s20e into 52s13e
AREA FORECAST:
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ASCENSION (06S/15S, 00E/20W):
WIND : SE to E 10 to 15.
VIS : Good.
ANGOLA (06S/15S, 00E/00N):
WIND : SW 05 to 10 in the east, otherwise S to SE 10 to 15.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : S to SE 10 to 20 in the north, otherwise N to NW 10 to 20
reaching 25 to 30 in the south-west towards the end of the
period.
VIS : Good but moderate to poor in showers and thundershowers in the
south-west, spreading to the south towards the end of the period.
SEA STATE: 3.0 to 4.0m in the south-west towards the end of the period, with
NW swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : NW 05 to 15 in the south-west, otherwise S to SE 10 to 20.
VIS : Good but moderate in showers and rain in the south-west.
TRISTAN (30S/40S, 00E/20W):
WIND : Variable 05 to 10 in the north-east at first and SW to W 10 to 20
in the south, otherwise NW 10 to 20 reaching 25 to 30 in the
north-west towards the end of the period, while becoming SE 25 to
35 in the west.
VIS : Good but moderate in showers and rain in the south, becoming poor
in the north-west with thundershowers towards mid-period,
spreading to the central parts towards the end of the period.
SEA STATE: 3.0 to 4.0m reaching 4.5m in the extreme south, with SW to W
swell, becoming with SE swell in the west towards the end of the
period.
CAPE WEST (30S/40S, 00E/20E):
WIND : S to SE 05 to 15 in the extreme north-east, otherwise W to NW 10
to 20 reaching 25 to 30 in the south.
VIS : Good but moderate to poor in frontal showers and rain in the
central and south-eastern parts until mid-period.
SEA STATE: 3.0 to 3.5m in the southern and western halves, reaching 4.5 to
5.0m in the extreme south, with W to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to SW 10 to 20 in the east, otherwise NW 10 to 20 reaching 25
to 30 in the south-west until mid-period, but N to NE 15 to 25 in
the north-west.
VIS : Good but moderate in showers and thundershowers in the east and
south-west until mid-period.
SEA STATE: 3.0m reaching 3.5 to 4.5m in the south-west with W to NW swell,
where it will subside to 3.0 to 3.5m from mid-period with SW
swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : Variable 05 to 10 in the north-west at first, otherwise S to SW
05 to 15 but N to NE 15 to 25 in the west.
VIS : Good but moderate in showers and thundershowers in the extreme
south-east until mid-period.
SEA STATE: 3.0m with SE swell but 3.5 to 4.5m in the east with S to SW
swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 10 to 20 reaching 25 in the south-east, but variable 05
to 10 in the extreme south-west.
VIS : Good.
SEA STATE: 3.0m in the south-east, with S swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : S to SE 10 to 20.
VIS : Good but moderate in showers and rain in places.
SEA STATE: 3.0m in the extreme south, with SW swell.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : SW 15 to 25 in the south-east until mid-period but anticyclonic
05 to 15 in the north-east, otherwise W to NW 15 to 25 reaching
30 in the south-west, spreading to the south-east towards the end
of the period.
VIS : Good, becoming moderate in showers and rain in the west towards
mid-period, spreading to the east towards the end of the period.
SEA STATE: 3.0m in the south-east at first, reaching 3.5 to 4.0m in the
south-west towards mid-period, spreading to the east 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)
2026/07/05 AT 0500UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- VIOLENT STORM FORCE 11 OVER AMS AND KER
- GUST FORCE 8 OVER CRO.
PART 2: GENERAL SYNOPSIS, 2026/07/05 AT 0000UTC
- DEEPENING LOW 983 HPA NEAR 40S/57E, MOVING EASTWARD EXPECTED 978 HPA NEAR
41S/70E AT 06TU THEN 975 HPA NEAR 41S/80E AT END.
- ASSOCIATED TO THE LOW: COLD FRONT AXIS 28S/52E, 32S/59E, 39S/65E AND WARM
FRONT AXIS 42S/61E, 42S/68E, 39S/73E, MOVING EASTWARD.
PART 3: FORECAST FOR 24 HOURS FROM 2026/07/05 AT 0600UTC TO 2026/07/06 AT 0600UTC
WAM (30S/40S, 50E/65E)
SHOWERS OVER EASTERN AT FIRST.
WIND: SW 6 TO 7 OVER SOUTH-EASTERN AT BEGINNING, DECREASING 4 TO 5
ELSEWHERE. ANTICLOCKWISE 3 TO 4 BY WESTERN SOON.
SEA : VERY ROUGH TO HIGH , BECOMING ROUGH TO VERY ROUGH LATER. SOUTH-
WESTERLY SWELL 4 OR 6 M, THEN ABATING S 3 TO 4 M AT END.
VIS : VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
FRONTAL RAIN, SQUALLS AND SHOWERS MAINLY SOUTHERN.
WIND: NW 6 TO 7, LOCALLY 8, INCREASING CLOCKWISE 8 TO 9 OVER SOUTHERN AND
REACHING 10 TO 11 AT TIMES NEAR THE CENTER. VIOLENT GUSTS. SW 5 TO 6
BEHIND SOON.
SEA : VERY ROUGH TO HIGH BECOMING VERY HIGH OVER FAR SOUTHERN SOON. SW SWELL
3 TO 5 M, INCREASING LOCALLY 5 TO 6 M OVER SOUTHERN.
VIS : VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
SHOWERS OVER NORTH-EASTERN AT FIRST.
WIND: SOUTH-WESTERLY 7 TO 8 OVER NORTH-ESATERN AT BEGINNING, SETTING-UP
SOUTH TO SOUTH-WEST 4 TO 6 ELSEWHERE. ANTICLOCKWISE 3 TO 4 OVER NORTH-
WESTERN AND NW 5 TO 6 OVER SOUTH-WESTERN AT END. GUSTS.
SEA : ROUGH TO VERY ROUGH, HIGH OVER NORTH-EASTERN AT FIRST. SOUTH-WESTERLY
SWELL 2 TO 3 M, INCREASING 4 TO 5 M OVER NORTH-EASTERN AT BEGINNING,
DECREASING.
VIS : VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
FRONTAL RAIN, SQUALLS AND SHOWERS.
WIND: - NORTHERN: CLOCKWISE 8 TO 9, INCREASING 10 TO 11 NEAR THE CENTER OVER
FAR NORTH-EASTERN AREA IN THE EVENING. SOUTH-WEST 4 TO 6
BEHIND.VIOLENT GUSTS.
- SOUTHERN: SETTING-UP SOUTH-WEST 5 TO 7.
SEA : ROUGH TO VERY ROUGH IN SOUTH, VERY ROUGH TO HIGH IN NORTH, LOCALLY VERY
HIGH OVER NORTHEASTERN AREA SOON. SW SWELL 4 OR 5 M.
VIS : VERY POOR IN PRECIPITATION.