WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII.
ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE
27TH OF APRIL 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 272200 TO 282200 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. TRADES: S to SE 35 in the south-east until in the afternoon.
2. TRISTAN: N to NW 35 in the south-west at times.
3. CAPE EAST: W to SW 35 to 40 in places in the central and western half,
spreading to the east from mid-period, while reaching 45 in
the southern parts.
4. DURBAN EAST: S to SW 35 in the south-west, spreading to the south
towards the end of the period.
5. MARION FORTIES EAST: Cyclonic 35 to 45 in the west, north-west and
south-west, spreading to the north from mid-period.
SYNOPTIC CHART 12:00Z
=====================
High 1039 hPa 40s04w, High 1025 40s64e
Low 987 hPa 45s33e.
1. Cold Front: 29s31e 32s35e 36s36e 40s35e into 45s33e.
AREA FORECAST:
==============
ASCENSION (06S/15S, 00E/20W):
WIND : E to SE 15 to 25.
VIS : Good, but moderate in showers and thundershowers in the extreme
northern parts.
ANGOLA (06S/15S, 00E/00N):
WIND : S to SE 10 to 20, but SW 05 to 15 in the east.
VIS : Good, but moderate in showers and thundershowers in the north.
SEA STATE: 3.0m in the south from mid-period, with S to SW swell.
ST HELENA (15S/30S, 00E/20W):
WIND : E to SE 10 to 20, reaching 25 to 30 over the central and eastern
parts.
VIS : Good, but moderate in showers and rain in the central parts.
SEA STATE: 3.0 to 3.5m over the central and eastern parts, with SE swell.
TRADES (15S/30S, 00E/WEST COAST):
WIND : S to SE 15 to 25 reaching 30 to 35 in the south-east until in the
afternoon.
VIS : Good, but moderate in light rain in the west until mid-period.
SEA STATE: 3.0 to 4.0m, reaching 4.5m in the south-east until in the
afternoon, with S to SE swell.
TRISTAN (30S/40S, 00E/20W):
WIND : Anticyclonic 05 to 15 in the east, but E to NE 10 to 20 in the
north, otherwise N to NW 15 to 25 reaching 30 to 35 in the south-
west at times.
VIS : Good, becoming moderate to poor in showers and thundershowers in
the west and south-west.
SEA STATE: 3.0 to 4.0m in the north-west and western parts, reaching 4.5 to
5.0m in the south-west at first, with NE swell in the north-west,
otherwise, NW.
CAPE WEST (30S/40S, 00E/20E):
WIND : Anticyclonic 05 to 15 in the west, but SE 15 to 25 in the
northern parts, otherwise S to SW 15 to 25, reaching 30 in the
south-east at first.
VIS : Good, but moderate in showers and rain in the east and south-
east at first.
SEA STATE: 3.0 to 4.0m in the north and eastern parts, reaching 4.5 to 5.0m
in the south-east until mid-period, with S to SW swell.
CAPE EAST (32.5S/40S, 20E/50E):
WIND : W to SW 15 to 25, but 30 to 40 in places in the central and
western half, spreading to the east from mid-period, while
reaching 45 in the southern parts.
VIS : Moderate to poor in showers and thundershowers in places in the
east at first, otherwise moderate in showers and rain.
SEA STATE: 3.0 to 4.0 in the central parts, but 5.0 to 6.0 in the western
half, reaching 7.0 to 9.0m in the south from the morning,
spreading to the central parts from mid-period as well as eastern
parts from the afternoon, with W to SW swell.
DURBAN EAST (32.5S/25S, EAST COAST/55E):
WIND : N to NW 05 to 15 in the east, otherwise S to SW 15 to 25,
reaching 30 to 35 in the south-west, spreading to the south
towards the end of the period.
VIS : Moderate in showers and rain in places.
SEA STATE: 3.0 to 4.0m in the west, reaching 5.0 to 6.0m in the south-west
spreading to the west from mid-period, as well as south from the
afternoon, with SW swell.
MOZAMBIQUE CHANNEL:
WIND : S to SE 05 to 15, reaching 20 to 25 in the south-west at first as
well as in the south from mid-period.
VIS : Good, but moderate in showers and thundershowers in places in the
north.
SEA STATE: 3.0m in the south-west by the end of the period, with SW swell.
MADAGASCAR EAST (10S/25S, EAST COAST/55E):
WIND : E to NE 05 to 15 in the south, otherwise S to SE 05 to 15.
VIS : Moderate in showers and thundershowers in places.
MARION FORTIES EAST (40S/50S, 35E/50E):
WIND : Cyclonic 15 to 25, reaching 35 to 45 in the west, north-west and
south-west, spreading to the north from mid-period.
VIS : Good in the east at first, otherwise moderate to poor in showers
and rain in places.
SEA STATE: 3.0 to 4.0m except in the north-east, reaching 5.0 to 6.0m in the
north-west and south-west, becoming 7.0 to 9.0m in the west and
northern parts from mid-period, with NW swell, but SE in the
south-west.
AREA 2:
=======
MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA
ACK (AMSTERDAM-CROZET-KERGUELEN)
26/04/27 AT 1600UTC
AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40%
STRONGER THAN THE AVERAGES GIVEN HERE).
PART 1: WARNING
- GALE EXPECTED OVER WAM AND CRO.
PART 2: GENERAL SYNOPSIS, 26/04/27 AT 1200UTC
- EXTRA-TROPICAL LOW JULUKA 1000 HPA NEAR 35S/48E, MOVING SLOWLY
SOUTHEASTWARD.
- HIGH 1025 OVER AMS AND KER.
PART 3: FORECAST FOR 24 HOURS FROM 26/04/27 AT 1800UTC TO 26/04/28
AT 1800UTC
WAM (30S/40S, 50E/65E)
RAIN, SHOWERS AND SQUALLS.
WIND: INCREASING NE 7/8 OVER SOUTHWESTERN AT FIRST WITH JULUKA,
SETTING UP NW 5/6 NEXT.
SEA: MODERATE TO ROUGH, LOCALLY VERY ROUGH OVER FAR SOUTHERN.
VISI: POOR TO VERY POOR IN PRECIPITATION.
AMS (30S/40S, 65E/80E)
SHOWERS AND SQUALLS OVER NORTHEASTERN AT FIRST.
WIND: ANTICLOCKWISE 3/5.
SEA: MODERATE TO ROUGH.
VISI: VERY POOR IN PRECIPITATION.
CRO (40S/50S, 50E/65E)
RAIN OVER SOUTHERN AT FIRST, SHOWERS AND SQUALLS FROM NORTH SOON.
WIND: N 4/5 INCREASING NE 7/8 OVER NORTHERN SOON, OVER EASTERN AT END
WITH JULUKA.
SEA: MODERATE TO ROUGH, BECOMING VERY ROUGH OVER NORTHERN SOON, OVER
EASTERN AT END.
VISI: POOR TO VERY POOR IN PRECIPITATION.
KER (40S/50S, 65E/80E)
SCATTERED RAIN AT FIRST.
WIND: ANTICLOCKWISE 3/5 BUT SW 6/7 OVER SOUTHEASTERN AT FIRST,
INCREASING N 5/6 OVER WESTERN AT END.
SEA: MODERATE TO ROUGH BUT VERY ROUGH OVER SOUTHEASTERN. W SWELL 3 TO
5 M OVER SOUTHERN.
VISI: POOR IN PRECIPITATION.=