WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
29TH OF JUNE 2026 AT 17:30 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 292200 TO 302200 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. TRISTAN: Cyclonic 35 to 40 in the central part, drifting to the east
by mid-period.
2. CAPE EAST: N to NW 35 in the east, drifting to the north-east by mid-
period, but SW to W 35 in places in the south-east until
mid-period.
3. MARION FORTIES EAST: N to NW 35 in the north-east at first, but W to
SW 35 in the south.
SYNOPTIC CHART 12:00Z
=====================
High 1030 hPa 31s05w, High 1040 hPa 40s72e
Low 1010 hPa 40s12w, Low 992 hPa 47s38e.
1. Cold Front: 32s15w 36s10w 39s08w 43s09w into 40s12w.
2. Cold Front: 32s30e 41s38e 48s43e 54s43e into 47s38e.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : SE 15 to 25.
VIS : Good, but moderate in showers and rain in places.
SEA STATE: 3.0 to 3.5m in the west, with SE swell.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20, but SW 05 to 15 in the east.
VIS : Good.
ST HELENA (15S/30S, 00E/20W):
WIND : Variable 05 to 10 in the south, drifting to the south-west by
mid-period, otherwise S to SE 15 to 25, but SW 15 to 25 in the
extreme south-east.
VIS : Good, but moderate in showers and rain in places in the north
and in the south-west from mid-period.
SEA STATE: 3.0 to 3.5m in the north-west and south-east, with S to SE
swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 15 to 25, but variable 05 to 10 in the south-west.
VIS : Good, but moderate in rain and showers by the end of the
period.
SEA STATE: 3.0 to 3.5 m in the south-east until mid-period, with SW
swell, but SE swell in the north.
TRISTAN (30S/40S, 00E/20W):
WIND : Cyclonic 20 to 30 in the central part reaching 35 to 40,
drifting to the east by mid-period, otherwise Anticyclonic 05
to 15, becoming NW 15 to 25 in the extreme south-west by mid-
period, spreading to the south-west towards the end of the
period.
VIS : Good in the central parts, otherwise moderate in showers and
rain.
SEA STATE: 3.0 to 4.0, reaching 5.0 to 6.0m in the central parts drifting
to the north-east by mid-period, with S to SW swell.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anticyclonic 05 to 15, but SE 10 to 20 in the extreme north-
east, spreading to the extreme east from mid-period, becoming
N to NE 15 to 25 in the west from mid-period.
VIS : Good, but moderate in showers in the south-east, spreading to
the west towards the end of the period.
SEA STATE: 3.0 to 3.5m in the east, with SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : N to NW 20 to 30 in the east reaching 35, drifting to the
north-east by mid-period, otherwise SW to W 15 to 25 reaching
30 to 35 in places in the south-east until mid-period, but
Anticyclonic 05 to 15 in the west, spreading to the east from
mid-period.
VIS : Good in the central parts, otherwise moderate in showers and
rain.
SEA STATE: 3.0 to 4.0m, reaching 4.5 to 5.5m in places, with SW swell,
but NW swell in the north-east.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : SW 15 to 25 in the extreme west, becoming SE to S 15 to 25 in
the west, otherwise E to NE 10 to 20 reaching 25 to 30 in
places, becoming variable 05 to 10 in places in the central
part from mid-period.
VIS : Good, but moderate in showers and thundershowers in places.
SEA STATE: 3.0 to 3.5m, reaching 4.0 to 4.5m in the south-west at first,
with SE swell, but SW swell in the south-west.
MOZAMBIQUE CHANNEL:
WIND : SE to S 10 to 20, but variable 05 to 10 in the south-west.
VIS : Good.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to SE 10 to 20 reaching 25 to 30 in the north-east.
VIS : Moderate in showers and rain in places, clearing in the east by
mid-period.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : N to NW 25 to 35 in the north-east at first, otherwise W to SW
15 to 25 reaching 30 to 35 in the south, becoming Anticyclonic
05 to 15 in the north-west from mid-period, spreading to the
north-east by the end of the period.
VIS : Good, but moderate in showers and rain in the east and snow-
showers in the south until mid-period.
SEA STATE: 4.0 to 5.0m reaching 6.0 to 7.0m in the south, with W to SW
swell.
AREA 2:
=======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN)
26/06/29 AT 1700UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER
THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
GALE RUNNING ON CRO AND KER.
PART 2: GENERAL SYNOPSIS, 26/06/29 AT 1200UTC
- HIGH1042 HPA NEAR 40S/71E, MOVING SLOWLY EASTWARD.
- COLD FRONT CENTRED AT 35S27E, 40S37E, 52S47E MOVING ENE AT 20 KT.
- SQUALLY AREA EXTENDING FROM 28S63E TO 29S75E AND 22S80E, MOVING SLOWLY
SOUTHWARD
PART 3: FORECAST FOR 24 HOURS FROM 26/06/29 AT 1800UTC TO 26/06/30 AT
1800UTC
WAM (30S/40S, 50E/65E)
RAIN AND LOCALLY THUNDERSTORMS IN THE COLD FRONT AREA. SCATTERED SHOWERS
ELSEWHERE.
WIND:
IN THE NORTHERN HALF: EASTERLY WIND FORCE 5 TO 6 IN THE EASTERN PART OF THE
AREA, WEAKENING 4 TO 5 TOMORROW; SHIFTING TO NORTHEAST
TO NORTH IN THE WESTERN PART OF THE AREA FORCE 3 TO 4,
THEN FORCE 2 TO 3 AT END.
IN THE SOUTHERN HALF: NORTHERLY WIND 4 TO 6 BLOWING FROM EAST TO WEST,
SHIFTING TO NORTHWEST AT FORCE 6 TO 7 AHEAD OF THE
FRONT TO THE WEST OF THE AREA, THEN TURNING SOUTH AT
THE SAME STRENGTH BEHIND THE FRONT AT END.
SEA : MODERATE TO ROUGH, BECOMING ROUGH TO LOCALLY VERY ROUGH IN THE FAR
NORTH-EAST AND SOUTH-WEST. EASTERLY SWELL, 2 TO 4 METERS IN NORTH PART
OF THE AREA AND SOUTWEST SWELL 2 METERS IN SOUTHWEST PART OF THE AREA.
VIS : POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SCATTERED SHOWERS, BECOMING MORE FREQUENT WITH THUNDERSQUALLS.
WIND:
NORTHERN HALF: EASTERLY WINDS FORCE 5 TO 7 FROM SOUTH TO NORTH, VEERING
NORTHEAST BY THE END OF THE PERIOD. STRONG GUSTS WITH
THUNDERSTORMS.
SOUTHERN HALF: ANTICYCLONIC WINDS FORCE 3 TO 4, VEERING NORTHEAST TO NORTH
FORCE 4 TO 5 IN THE WESTERN PART OF THE AREA.
SEA : ROUGH TO VERY ROUGH IN THE SOUTHERN HALF AND ROUGH TO VERY ROUGH IN THE
NORTHERN HALF. SOUTH-WESTERLY SWELL OF 2 TO 4 METERS ABATING.
VIS : VERY POOR UNDER THUNDERSTORM.
CRO (40S/50S, 50E/65E)
LOCALLY THUNDERY SHOWERS AND FRONTAL RAIN IN THE SOUTH-WEST.
SCATTERED SHOWERS ELSEWHERE.
WIND: NORTHWEST, FORCE 5 TO 6 STRENGTHENING TO FORCE 7 TO 8 WITH VIOLENT
GUSTS AHEAD OF THE FRONT; SHIFTING SOUTHWEST TO WEST BEHIND THE FRONT
FORCE 5 TO 6 LOCALLY 7 IN THE SOUTH.
SEA : ROUGH TO STRONG IN THE NORTHERN HALF, BECOMING STRONG TO VERY STRONG;
STRONG TO VERY STRONG IN THE SOUTHERN HALF, LOCALLY HEAVY IN THE FAR
SOUTH.
VIS : VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
SCATTERED SHOWERS BECOMING MORE FREQUENT IN THE SOUTHWESTERN PART OF THE AREA AT END.
WIND :
IN THE NORTHERN HALF: WEST TO NORTHWEST WINDS, FORCE 3 TO 5 FROM NORTH TO
SOUTH, FRESHENING TO FORCE 5 TO 6 FROM THE WEST.
IN THE SOUTHERN HALF: WEST TO NORTHWEST WINDS, FORCE 5 TO 6, STRENGTHENING TO
FORCE 6 TO 7, LOCALLY REACHING FORCE 8 IN THE SOUTHERN
PART OF THE AREA.
SEA : MODERATE TO ROUGH IN THE NORTH, BUT ROUGH TO VERY ROUGH IN THE SOUTH.
WEST-SOUTH-WESTERLY SWELL 2 TO 4 METRES.
VIS : POOR IN PRECIPITATION