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 5 August 2026
Part 1 Warnings
Refer to latest warnings for boundary of affected area and type of weather
system.
Melbourne Storm Force Warning 3.
Melbourne Gale Warning 9.
Melbourne Gale Warning 11.
Part 2 Situation at 050600 UTC
Trough 12S094E 18S104E. Forecast slow moving.
Cold front [1] 34S089E 46S107E 50S105E. Forecast 40S121E 50S129E at 061200UTC.
Forecast cold front [2] 42S093E 50S098E developing by 060300UTC, then 39S100E
45S106E 50S107E 061200UTC.
Part 3 Forecast
Refer to latest warnings for details of the area affected.
South of line 35S080E 32S095E 39S129E, outside warning areas:
Northwesterly quarter winds east of cold fronts shifting southwesterly quarter
west of cold fronts. Wind speeds 25/33 knots. Rough to very rough seas.
Moderate to heavy swell.
West of line 12S091E 19S103E:
Southeasterly quarter winds 20/30 knots. Rough to very rough seas. Moderate to
heavy swell.
Remainder:
Winds not exceeding 25 knots. Moderate to rough seas. Low to moderate swell,
increasing to moderate to heavy south of line 22S090E 21S110E 34S129E.
Rain areas, scattered showers and isolated thunderstorms mostly within 180nm of
fronts and 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 21:00 UTC Wednesday.
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 1100 UTC 5 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 11.
Part 2 Situation at 050600 UTC
Trough [1] 47S132E 50S131E. Forecast 49S138E 50S139E at 051800UTC and weakening
thereafter.
Trough [2] 45S152E 44S158E 38S161E. Forecast 43S159E 41S162E 35S164E at
060000UTC and moving east of area thereafter.
Low 1012hPa near 42S154E. Forecast low 1015hPa near 43S159E at 060000UTC and
low 1010hPa near 46S156E at 061200UTC.
Part 3 Forecast
Refer to latest warnings for details of the area affected.
Within area bounded by 35S166E 34S162E 45S151E 47S152E 45S160E 38S164E 35S166E:
Northeasterly quarter winds 20/30 knots within 120nm of trough [2]. Moderate to
rough seas. Low to moderate swell.
South of line 42S129E 43S138E 50S142E, outside warning areas:
Northerly quarter winds east of trough [1] shifting westerly quarter within
west of trough [1], turning northwesterly quarter throughout from 051800UTC.
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
troughs, and within 400nm of low, tending isolated 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 21:00 UTC Wednesday.
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 1100 UTC 5 August 2026
Part 1 Warnings
Nil.
Part 2 Situation at 050600 UTC
Trough EQ158E 09S160E 13S170E. Forecast EQ155E 08S160E 12S170E at 051800UTC and
weakening thereafter.
Part 3 Forecast
South of line 04S142E 02S154E 09S159E 09S170E and north of line 15S142E 25S163E:
Southeasterly quarter winds 15/25 knots, increasing to 20/30 knots east of 157E
and through the Vitiaz Strait. Moderate to rough seas. Low to moderate swell.
Remainder:
Winds not exceeding 20 knots. Slight to moderate seas. Low to moderate swell.
Scattered showers and isolated thunderstorms throughout most of area. Heavy at
times within 240nm south 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 21:00 UTC Wednesday.
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 1100 UTC 5 AUGUST 2026
PART 1 WARNINGS
NIL.
PART 2 SITUATION AT 050600 UTC
TROUGH 06S090E TO LOW 1009HPA NEAR 04S095E TO 01S099E. FORECAST SLOW
MOVING.
PART 3 FORECAST
SOUTH OF LINE 06S090E 04S095E 01S099E:
SOUTHEASTERLY QUARTER WINDS 15/25 KNOTS. MODERATE TO ROUGH SEAS. LOW
SWELL.
REMAINDER:
WINDS NOT EXCEEDING 20 KNOTS. SLIGHT TO MODERATE SEAS. LOW SWELL,
INCREASING TO
LOW TO MODERATE WEST OF LINE EQ098E 07S106E 09S119E 12S119E.
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS MOSTLY WITHIN 420NM OF
TROUGH,
TENDING TO 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 20:15 UTC WEDNESDAY.=