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 18 May 2026
Part 1 Warnings
Refer to latest warnings for boundary of affected area and type of weather
system.
Melbourne Gale Warning 11.
Part 2 Situation at 180600 UTC
Cold front [1] near 46S108E 48S114E 50S117E. Forecast cold front [1] near
47S121E 48S125E 50S128E at 181800UTC and east of area thereafter.
Warm front near 43S120E 50S117E 50S117E. Forecast warm front near 49S129E
50S128E at 181800UTC and south of area thereafter.
Trough [1] near 34S078E 38S083E 43S086E. Forecast near 32S090E 40S098E to
developing low 991hPa near 45S098E at 190000UTC, and then near 33S101E 42S107E
to low 985hPa near 47S108E at 191200UTC.
Trough [2] forecast to enter the area from the west near 44S076E 47S080E
50S078E at 190600UTC, and near 42S081E 47S085E 50S084E at 191200UTC.
Part 3 Forecast
Refer to latest warnings for details of the area affected.
South of line 37S080E 34S095E 40S129E, outside warning areas:
Westerly quarter winds, shifting northwesterly quarter within 300nm east of
cold front and troughs, southwesterly quarter within 300nm west of cold front
and troughs and northeasterly quarter within 60nm south of warm front. Wind
speeds 20/33 knots. Rough to very rough seas. Moderate to heavy swell.
East of line 16S119E 19S111E 22S111E:
Easterly quarter winds 20/30 knots. Rough seas. Moderate swell.
Remainder:
Winds not exceeding 25 knots. Moderate to rough seas. Moderate swell.
Rain areas, scattered showers and isolated thunderstorms mostly within 180nm of
cold fronts and east of line 12S116E 22S105E. Heavy at times within 120nm of
line 14S123E 17S118E. 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 Monday.
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 18 May 2026
Part 1 Warnings
Melbourne Gale Warning 12.
Part 2 Situation at 180600 UTC
Trough near 37S151E 42S153E 46S151E. Forecast trough 31S154E to developing low
1005hPa near 36S153E to 43S155E at 190000UTC, and near 25S156E 34S156E 4to low
1000hPa near 0S154E to 44S157E at 191200UTC.
Cold front [1] near 39S135E 45S137E 50S136E. Forecast cold front near 45S151E
50S152E at 191200UTC.
Cold front [2] forecast to enter area from the west near 46S130E 50S132E at
190000UTC, and near 43S138E 47S141E 50S141E at 191200UTC.
Part 3 Forecast
South of line 40S129E 41S137E 50S146E 50S146E:
Westerly quarter winds, shifting northwesterly quarter within 240nm east of
cold fronts. Wind speeds 20/30 knots. Rough seas. Moderate swell.
South of line 440S129E 39S137E 50S146E 50S146E:
Northeasterly quarter winds east of trough, shifting southwesterly quarter west
of trough, and turning clockwise within 180nm of low. Wind speeds 20/33 knots.
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 mainly within 240nm of
cold front and within 300nm of lows. Heavy at times within 240nm of 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 Monday.
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 18 May 2026
Part 1 Warnings
Nil.
Part 2 Situation at 180600 UTC
Southeasterly trade flow.
Part 3 Forecast
South of line 25S154E 17S159E 16S170E:
Easterly quarter winds 15/25 knots. Moderate to rough seas. Low to moderate
swell.
Within 90nm of line 12S146E 08S145E:
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 swell south of line 08S167E 15S166E 19S150E.
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 21:00 UTC Monday.
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 18 MAY 2026
PART 1 WARNINGS
NIL.
PART 2 SITUATION AT 180600 UTC
NIL SIGNIFICANT FEATURES.
PART 3 FORECAST
WITHIN 60NM OF LINE 14S125E 10S132E 10S137E 16S140E:
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
MODERATE WEST OF LINE 09S118E 07S107E EQ097E.
RAIN AREAS, SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS THROUGHOUT
THE 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 20:15 UTC MONDAY.=