IDY10220
SECURITE
Updated 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 20 June 2026
Part 1 Warnings
Refer to latest warnings for boundary of affected area and type of weather
system.
Melbourne Gale Warning 10.
Melbourne Gale Warning 12.
Part 2 Situation at 201800 UTC
Cold front [1] 36S113E 50S116E. Forecast cold front [1] exiting to the east
near 36S127E 50S140E at 220000UTC.
Trough [1] 29S104E 36S113E. Forecast trough [1] 32S115E 36S127E at 220000UTC.
Trough [2] 12S098E 23S099E 28S105E. Forecast trough [2] 12S098E 22S103E 25S109E
at 220000UTC.
Low 1014hPa near 25S101E. Forecast low 1017hPa near 24S104E at 211200UTC and
weakening thereafter.
Cold front [2] 42S077E 48S078E. Forecast cold front [2] 41S103E 50S104E at
220000UTC.
Warm front 45S086E 48S078E. Forecast warm front 48S106E 51S099E at 211800UTC
and weakening thereafter.
Part 3 Forecast
Refer to latest warnings for details of the area affected.
South of line 40S, outside of warning areas:
Westerly quarter winds shifting northwesterly quarter east of cold front [1]
and within 300nm east of cold front [2], tending southwesterly quarter within
240nm west of cold front [1], turning easterly quarter south of warm front.
Wind speeds 20/33 knots. Rough to very rough seas. Moderate to heavy swell.
Remainder:
Winds not exceeding 25 knots. Rough to very rough seas. Moderate swell,
increasing to moderate to heavy south of line 35S103E 39S118E.
Rain areas, scattered showers and isolated thunderstorms mostly within 360nm of
low, within 300nm of trough [2] and fronts, and within 180nm of trough [1].
Heavy at times within 240nm of 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 09:00 UTC Sunday.
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 20 June 2026
Part 1 Warnings
Nil.
Part 2 Situation at 201800 UTC
Cold front [1] west of area 36S113E 50S116E. Forecast cold front [1] 36S127E
50S140E at 220000UTC.
Low [1] 1022hPa near 38S152E to trough [1] 39S154E 39S160E. Forecast low [1]
1021hPa near 36S154E to trough [1] 39S156E 37S163E at 220000UTC.
Trough [2] 26S152E 36S167E. Forecast trough [2] 26S152E to low [2] 1025hPa
developing near 29S155E to trough [2] 30S161E 34S167E at 211200UTC, and trough
[2] 25S155E to low [2] 1024hPa near 30S156E to trough [2] 30S161E 33S168E at
220000UTC.
Part 3 Forecast
South of line 40S129E 48S147E 46S160E:
Westerly quarter winds shifting northwesterly quarter within 900nm east of cold
front [1].
Wind speeds 20/30 knots. Rough seas. Moderate swell to heavy swell.
Remainder:
Winds not exceeding 25 knots. Moderate to rough seas. Low to moderate swell.
Rain areas, scattered showers and isolated thunderstorms mainly within 180nm of
cold front, and 120nm of troughs 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 Sunday.
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 20 June 2026
Part 1 Warnings
Nil.
Part 2 Situation at 201800 UTC
Trough near EQ162E 10S159E. Forecast near EQ157E 10S158E at 220000UTC.
Part 3 Forecast
North of line EQ152E 06S158E 06S170E and south of line 20S149E 23S170E:
Winds not exceeding 20 knots. Slight to moderate seas. Low swell increasing up
to moderate within 180nm south of line 03S163E 03S170E.
Remainder:
Southeasterly quarter winds 15/25 knots, reaching up to 30 knots east of line
10S163E 12S164E, and within the Vitiaz Strait at times. Moderate to rough seas.
Low to moderate swell.
Scattered showers and isolated thunderstorms throughout area. Heavy at times
within 240nm south of line 08S164E 06S170E. 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 Sunday.
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 20 JUNE 2026
PART 1 WARNINGS
NIL.
PART 2 SITUATION AT 201800 UTC
SOUTHEASTERLY TRADE FLOW.
PART 3 FORECAST
EAST OF LINE 12S112E 02S119E EQ128E:
SOUTHEASTERLY QUARTER WINDS 15/25 KNOTS. MODERATE TO ROUGH SEAS. LOW
SWELL,
INCREASING TO LOW TO MODERATE WEST OF LINE 09S121E 12S121E AND WITHIN
90NM OF
LINE 09S126E 11S129E.
REMAINDER:
WINDS NOT EXCEEDING 20 KNOTS. SLIGHT TO MODERATE SEAS. LOW SWELL,
INCREASING TO
LOW TO MODERATE SOUTH OF LINE EQ090E EQ097E 07S107E 09S116E.
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 SUNDAY.=