IDY10210
SECURITE
High Seas Forecast for South Eastern METAREA 10
SOUTH EASTERN AREA: COAST AT 25S TO 25S170E TO 29S170E TO 45S160E TO 50S160E TO
50S129E TO COAST AT 129E
Issued by the Australian Government Bureau of Meteorology
For 24 hours commencing 2300 UTC 17 August 2026
Part 1 Warnings
Nil.
Part 2 Situation at 171800 UTC
Trough west of area, forecast to enter near 32S130E 35S129E at 180000UTC.
Forecast trough near 37S140E 42S133E 45S131E 50S131E at 190000UTC.
Part 3 Forecast
West of line 30S129E 39S150E 45S149E 50S141E:
Northeasterly quarter winds 20/30 knots, turning southwesterly quarter west of
trough. Moderate to rough seas. Moderate swell.
Remainder:
Winds not exceeding 25 knots. Slight to moderate seas. Low to moderate swell.
Isolated showers, tending scattered within 120nm of the New South Wales coast
and within 240nm of trough. 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 09:00 UTC Tuesday.
IDY10230
SECURITE
High Seas Forecast for North Eastern METAREA 10
NORTHEASTERN AREA: EQUATOR TO 25S, 142E TO 170E
Issued by the Australian Government Bureau of Meteorology
For 24 hours commencing 2300 UTC 17 August 2026
Part 1 Warnings
Nil.
Part 2 Situation at 171800 UTC
Low 1008hPa near 07S169E. Forecast low 1009hPa near 06S164E at 190000UTC.
Part 3 Forecast
East of line EQ159E 06S164E 09S170E:
Winds not exceeding 20 knots. Slight to moderate seas. Low to moderate swell.
East of line 06S160E 24S157E:
Southeasterly quarter winds 20/30 knots. Rough seas. Moderate swell.
Remainder:
Southeasterly quarter winds 15/25 knots. Moderate to rough seas. Low to
moderate swell.
Rain areas, scattered showers and isolated thunderstorms within 360nm of low in
southern semicircle. Isolated showers elsewhere. 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 09:00 UTC Tuesday.
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 2300 UTC 17 August 2026
Part 1 Warnings
Refer to latest warnings for boundary of affected area and type of weather
system.
Melbourne Gale Warning 9.
Melbourne Gale Warning 12.
Part 2 Situation at 171800 UTC
Cold front [1] 33S124E 36S125E to low [1] 1002hPa near 41S123E. Forecast cold
front [1] near 40S129E to low 1007hPa near 42S127E at 181200UTC and decaying
thereafter.
Cold front [2] near 44S122E to low [2] 1001hPa near 49S125E. Forecast cold
front [2] near 46S124E to low [2] 1001hPa near 50S126E at 180000UTC and south
of area thereafter.
Cold front [3] near 30S085E 43S101E 50S104E. Forecast cold front [3] near
42S125E 50S125E at 190000UTC.
Cold front [4] west of area, forecast to enter near 48S080E 50S082E at
180600UTC, and forecast near 41S090E 47S105E 50S105E at 190000UTC.
Warm front west of area, forecast to enter near 47S085E 50S085E at 180600UTC.
Forecast warm front near 45S113E 49S109E 50S107E at 190000UTC.
Trough near 15S090E 21S095E 24S102E. Forecast trough near 12S093E 21S101E
25S106E at 190000UTC.
Part 3 Forecast
Refer to latest warnings for details of the area affected.
South of line 38S080E 33S097E 32S129E, outside warning areas:
Westerly quarter winds, shifting northwesterly quarter within 720nm east of
front [3], contracting to 300nm east of cold front [3] by 181200UTC. Winds
northerly quarter east of cold front [2] and southwesterly quarter within 900nm
west of cold front [3] and 360nm west of cold front [1], cold front [2], and
cold front [4]. Winds turning clockwise within 240nm of lows. Wind speeds 20/33
knots. Rough seas. Moderate to heavy swell.
West of trough:
Southeasterly quarter winds 20/30 knots. Rough seas. Moderate to heavy swell.
Remainder:
Winds not exceeding 25 knots. Slight to moderate seas. Moderate to heavy swell,
lowering to low swell east of line 12S098E 20S116E.
Rain areas, scattered showers and isolated thunderstorms mostly within 240nm of
trough, fronts and lows. 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 09:00 UTC Tuesday.
40:2:1:31:11:01:00
IDY10240
SECURITE
HIGH SEAS FORECAST FOR NORTHERN METAREA 8/10/11
NORTHERN AREA: EQUATOR TO 12S, 90E TO 142E AND SOUTHWARD TO COAST,
125E TO 142E
ISSUED BY THE AUSTRALIAN GOVERNMENT BUREAU OF METEOROLOGY
FOR 24 HOURS COMMENCING 2300 UTC 17 AUGUST 2026
PART 1 WARNINGS
NIL.
PART 2 SITUATION AT 171800 UTC
NIL SIGNIFICANT FEATURES.
PART 3 FORECAST
WEST OF LINE EQ108E 08S110E 12S113E:
WINDS NOT EXCEEDING 20 KNOTS. SLIGHT TO MODERATE SEAS. LOW SWELL,
INCREASING TO
MODERATE WEST OF LINE EQ099E 12S122E.
REMAINDER:
SOUTHEASTERLY QUARTER WINDS 15/25 KNOTS. MODERATE TO ROUGH SEAS. LOW
SWELL,
INCREASING TO MODERATE SWELL WEST OF LINE EQ099E 12S122E..
RAIN AREAS, SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS THROUGHOUT
AREA.
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 08:15 UTC TUESDAY.=