Bulletinset for METAREA 7 Edition date (UTC): 2026-08-18 21:55:43 ============================ HIGH SEAS FORECAST ============================ FQZA31 FAPR 181630 WEATHER BULLETIN FOR THE HIGH SEAS FOR METAREA VII. ISSUED BY THE SOUTH AFRICAN WEATHER SERVICE ON THE 18th OF AUGUST 2026 AT 1630 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 1600UTC 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.- STRONG GALE FORCE 9 OVER KER.- GALE FORCE 8 OVER WAM. PART 2: GENERAL SYNOPSIS, 26/08/18 AT 1200UTC - DEEPENING LOW 985 HPA NEAR 46S/52E, EXPECTED 971 HPA NEAR 49S/69E THE 18 AT 12UTC.- HIGH 1030 HPA NEAR 30S/65E MOVING SLOWLY NORTHEASTWARD. PART 3: FORECAST FOR 24 HOURS FROM 26/08/18 AT 1800UTC TO 26/08/19 AT 1800UTC WAM (30S/40S, 50E/65E) FRONTAL SHOWERS OVER SOUTHERN. WIND: NORTH-WEST 4 TO 6, INCREASING 7 TO 8 AHEAD THE FRONT OVER SOUTH-WESTERN AT FIRST, BACKING WEST TO SOUTH-WEST 5 TO 6 BEHIND. GUSTS. ANTICLOCKWISE 3 TO 4 BY WESTERN AT END. SEA: MODERATE TO ROUGH, LOCALLY VERY ROUGH OVER FAR SOUTHERN. SW SWELL 3 TO 4 M OVER SOUTHERN. VISI: POOR IN PRECIPITATION. AMS (30S/40S, 65E/80E) FRONTAL SHOWERS. WIND: WESTERLY 3 TO 5 SETTING-UP NORTH-WEST 6 TO 7 BY SOUTH-WESTERN AHEAD THE FRONT SOON AND BACKING SOUTH-WEST 6 BEHIND. SEA: ROUGH BECOMING MODERATE OVER NORTHERN LATER AND VERY ROUGH OVER SOUTHERN. SW SWELL 3 TO 4 M OVER SOUTHERN. VISI: POOR UNDER PRECIPITATION. CRO (40S/50S, 50E/65E) SQUALLS AND FRONTAL SHOWERS. WIND: CLOCKWISE 7 TO 8, LOCALLY 9 TO 10 NORTHERN OF THE CENTRE AT FIRST. SETTING-UP SOUTH-WEST 7 TO 8 BEHIND. NORTH-WEST 7 TO 8 BY SOUTH-WESTERN AT END. VIOLENT GUSTS. SEA: VERY ROUGH TO HIGH. WESTERLY SWELL 3 TO 5 M. VISI : VERY POOR IN PRECIPITATION. KER (40S/50S, 65E/80E) FRONTAL SHOWERS AND SQUALLS. WIND: SOUTH-WEST 7 TO 8 OVER SOUTH-EASTERN AT FIRST, DECREASING 5 TO 6 BEHIND. BECOMING CLOCKWISE 8 TO 9 SOON BY SOUTH-WESTERN. WESTERLY 6 TO 7 OVER NORTHERN. SEVERE GUSTS. SEA: VERY ROUGH TO HIGH, LOCALLY VERY HIGH BY SOUTH-WESTERN LATER. WESTERLY SWELL 4 TO 6 M, INCREASING 7M OVER SOUTH-EASTERN SOON. VISI: VERY POOR IN PRECIPITATION.