Bulletinset for METAREA 7 Edition date (UTC): 2026-08-18 14:52:15 ============================ HIGH SEAS FORECAST ============================ FQZA31 FAPR 181330 WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII. ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE 18th OF AUGUST 2026 AT 13:30 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: ======= FORECAST VALID FROM 182200 TO 192200 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: W to NW 35 in the west from mid-period. 2. CAPE WEST: W to NW 35 in the extreme south until the evening. 3. CAPE EAST: N to NW 35 in the south-west from mid-period, spreading to the central south by end of the period. 4. MARION FORTIES EAST: W to NW 35 to 40 in the south-west, spreading eastwards by the evening. SYNOPTIC CHART 12:00Z ===================== High 1030 hPa 30s23w High 1028 hPa 34s12e High 1030 hPa 30s64e. Low 1022 hPa 31s32e Low 1018 hPa 20s39e Low 1022 hPa 29s01w Low 982 hPa 46s51e 1. Cold front: 37s41e 42s54e into 46s51e AREA FORECAST: ============== ASCENSION (06S/15S, 00E/20W): WIND : E to SE 10 to 20. VIS : Good. ANGOLA (06S/15S, 00E/00N): WIND : S to SE 10 to 15 but SW 05 to 10 in the east. VIS : Good. ST HELENA (15S/30S, 00E/20W): WIND : E to SE 10 to 20, becoming NW 10 to 20 in the south-west by mid- period, reaching 25 in the extreme south-west at end of the period. VIS : Good in the north-east and south-west, otherwise moderate in showers and thundershowers while clearing towards end of the period. SEA STATE: 3.0m in the north-east and south-west until mid-period, with S to SE swell. TRADES (15S/30S, 00E/WEST COAST): WIND : S to SE 10 to 20. VIS : Good, but moderate in showers in the extreme south-west. SEA STATE: 3.0m in places in the south-east, with S swell. TRISTAN (30S/40S, 00E/20W): WIND : Variable 05 to 10 in the north until mid-period, otherwise W to NW 10 to 20, but 25 to 30 in the west, where it will reach 35 from mid-period. VIS : Good, but moderate in showers in the south and west, becoming poor in the west from mid-period. SEA STATE: 3.0 to 4.0m in the west and south, reaching 4.5 to 5.0m in the south-west from mid-period, with W to SW swell, becoming NW swell in the west from mid-period. CAPE WEST (30S/40S, 00E/20E): WIND : Variable 05 to 10 over the central north until mid-period, but S to SE 10 to 20 in the north-east, otherwise but W to NW 15 to 25 reaching 30 to 35 in the extreme south until the evening, while moderating in the south-west from the mid-period. VIS : Good in the north-east, otherwise moderate in rain and showers, clearing by end of the period. SEA STATE: 3.0 to 3.5m in the south and east, reaching 4.5 to 5.5m in the south, but 6.0m in the extreme south-east from mid-period, with W to SW swell. CAPE EAST (32.5S/40S, 20E/50E): WIND : W to SW 15 to 25 in the east until mid-period, otherwise N to NW 15 to 25, reaching 30 to 35 in the south-west from mid-period, spreading to the central south by end of the period. VIS : Good, but moderate in showers and thundershowers in places in the south and east. SEA STATE: 3.0 to 4.0m in the south and west, reaching 5.0 to 6.0m in south west from mid-period, with W to SW swell. DURBAN EAST (32.5S/25S, EAST COAST/55E): WIND : E to SE 10 to 20 in the north-west, otherwise variable 05 to 10, becoming N to NE 15 to 25 in the west from mid-period. VIS : Good. MOZAMBIQUE CHANNEL: WIND : S to SE 05 to 15. VIS : Good, but moderate in showers in the north until mid-period. MADAGASCAR EAST (10S/25S, EAST COAST/55E): WIND : E to SE 10 to 20, but NE 05 to 15 in the south. VIS : Moderate in showers and thundershowers in places, clearing in the south from mid-period. MARION FORTIES EAST (40S/50S, 35E/50E): WIND : SW 20 to 30 in the east until mid-period, otherwise W to NW 20 to 30, reaching 35 to 40 in the south-west, spreading eastwards by the evening, when it will become SW 15 to 25 in the south-west. VIS : Moderate to poor in showers and possible snow showers in the south, while clearing over the north-east by mid-period. SEA STATE: 4.0 to 5.0m, reaching 6.0 to 7.0m in the south from mid-period, with W to NW swell. AREA 2: ======= MARINE METEOROLOGICAL BULLETIN FROM METEO-FRANCE/LA REUNION ON AREA ACK (AMSTERDAM-CROZET-KERGUELEN) 26/08/18 AT 0500UTC AVERAGED WIND SPEED ON BEAUFORT SCALE. (WIND GUSTS MAY BE ABOUT 40% STRONGER THAN THE AVERAGES GIVEN HERE). PART 1: WARNING - STORM FORCE 10 OVER CRO- SRONG GALE FORCE 9 OVER KER. PART 2: GENERAL SYNOPSIS, 26/08/18 AT 0000UTC - COLD FRONT (CF) AXIS 41S/36E, 43S/50E, 45S/65E, 49S/74E, 60S/66E,, MOVING EASTWARD.- DEEPENING LOW, 1004 HPA NEAR 42S/40E, EXPECTED OVER CRO, 986 HPA NEAR 46S/51E AT FIRST.- HIGH 1032 HPA NEAR 32S/59E MOVING SLOWLY NORTHEASTWARD. PART 3: FORECAST FOR 24 HOURS FROM 26/08/18 AT 0600UTC TO 26/08/19 AT 0600UTC WAM (30S/40S, 50E/65E) SCATTERED SHOWERS THEN FRONTAL RAIN AND SHOWERS OVER SOUTHERN LATER. WIND: ANTICLOCKWISE 3 TO 4 AT TIMES 5, INCREASING 6/7 OVER SOUTHERN AT FIRST. GUSTS. SEA: MODERATE TO ROUGH FROM NORTH TO SOUTH. SW SWELL 2 TO 3 M ABATING. VIS: POOR IN PRECIPITATION. AMS (30S/40S, 65E/80E) SCATTERED SHOWERS. WIND: BECOMING ANTICLOCKWISE 2 TO 4 OVER NORTHERN AND W 5/6 AT TIMES 7 OVER SOUTHERN AT END. SEA: ROUGH TO VERY ROUGH BECOMING MODERATE TO ROUGH OVER NORTH-WESTERN AREA AT END. SW SWELL 3 TO 5 METERS ABATING. VIS: GOOD. CRO (40S/50S, 50E/65E) FRONTAL RAIN AND SHOWERS UNDER CF. WIND: W TO NW 6 TO 7 WITH GUSTS TEMPORARILY VARIABLE 3 TO 4 OVER SOUTHERN AND INCREASING AT FIRST 7/8 AT TIMES 9 AND VERY LOCALLY 10 AT END BY WESTERN AREA. SEA: ROUGH TO VERY ROUGH BECOMING HIGH OVER EASTERN AT END. W SWELL 2 TO 4 METERS. VIS : POOR IN PRECIPITATION. KER (40S/50S, 65E/80E) FRONTAL RAIN AND SHOWERS UNDER CF. WIND: W 6 TO 7 AT TIMES 8 LOCALLY 9 OVER SOUTH-EASTERN DECREASING TEMPORARILY W 3 TO 5 BY WESTERN AREA SOON, INCREASING AT END 7/8 LOCALLY 9 BY WESTERN. GUSTS. SEA: VERY ROUGH TO HIGH. W SWELL 4 TO 6 METERS INCREASING 6 TO 8 METERS OVER SOUTH-EASTERN SOON. VIS: POOR IN PRECIPITATION.