FQAU23 AMMC 130900 IDY10220 SECURITE High Seas Forecast for Western METAREA 10 12S TO 30S BETWEEN 90E AND 125E, AND 30S TO 50S BETWEEN 80E AND 129E Issued by the Australian Government Bureau of Meteorology For 24 hours commencing 1100 UTC 13 August 2025 Part 1 Warnings Melbourne Gale Warning 2. Melbourne Gale Warning 3. Part 2 Situation at 130600 UTC Trough 13S098E 17S102E. Forecast near 17S098E 13S093E at 141200UTC. Cold front [1] 20S103E 28S109E to low 990hPa near 38S112E to warm front 43S117E. Forecast 33S129E 40S133E 46S134E to low 953hPa near 53S132E and warm front near 55S133E 57S136E at 140600UTC then continuing east of area. Cold front [2] 43S117E 46S120E 50S120E 51S118E. Forecast near 50S127E 51S128E 55S126E at 131800UTC then south of area afterwards. Cold front [3] near 34S065E 39S073E 42S076E 50S077E at 130600UTC, near 34S080E 39S094E 44S102E 50S104E at 141200UTC. Part 3 Forecast Refer to latest warnings for boundary of affected area and type of weather system. North of line 18S090E 19S099E and west of trough: Southeasterly quarter winds. Wind speeds 20/30 knots. Rough seas. Low to moderate swell. South of line 34S080E 36S100E 29S102E 28S113E 30S129E, outside warning areas: Northwesterly quarter winds, shifting southwesterly quarter west of fronts, and becoming northwesterly within 600nm east of cold front [3]. Winds tending clockwise within 180nm of low. Wind speeds 20/33 knots. Rough to very rough seas. Moderate to heavy swell. Remainder: Winds not exceeding 25 knots. Moderate to rough seas. Low to moderate swell. Rain areas, scattered showers and isolated thunderstorms mostly within 180nm of cold fronts, trough, and low. Visibility reducing below 2nm in precipitation. Please be aware Wind and wave forecasts are averages. Wind gusts can be 40 per cent stronger than the forecast, and stronger still in squalls and thunderstorms. Maximum waves can be twice the forecast height. WEATHER MELBOURNE The next routine forecast will be issued at 21:00 UTC Wednesday.