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 July 2026
Part 1 Warnings
Refer to latest warnings for boundary of affected area and type of weather
system.
Melbourne Gale Warning 7.
Part 2 Situation at 180600 UTC
Low 1007hPa near 27S157E to trough 30S159E 28S164E 25S166E. Forecast low
1012hPa near 25S158E to trough 28S161E 29S165E 25S167E at 190000UTC, low then
exiting area to the north thereafter and just trough near 25S159E 28S161E
28S165E 25S166E at 191200UTC.
Cold front near 34S116E 41S121E 44S120E 45S115E. Forecast cold front near
44S129E 47S131E 50S130E 52S129E at 191200UTC.
Part 3 Forecast
Refer to latest warnings for details of the area affected.
North of line 331S152E 34S156E 33S166E 31S169E, outside warning area:
Northeasterly quarter winds east of trough, turning clockwise around low. Wind
speeds 20/33 knots. Rough to very rough seas. Moderate to heavy swell.
South of line 39S129E 44S140E 42S145E 50S150E:
Northwesterly quarter winds 20/30 knots. Rough seas. Moderate to heavy swell.
South of line 50S157E 49S160E:
Northwesterly quarter winds 20/30 knots. 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 swell south of line 37S165E 41S160E 44S151E.
Rain areas, scattered showers and isolated thunderstorms mostly within 240nm of
front, trough, and 450nm of low. Heavy at times within 180nm east 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 Saturday.
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 July 2026
Part 1 Warnings
Refer to latest warnings for boundary of affected area and type of weather
system.
Melbourne Gale Warning 8.
Melbourne Gale Warning 9.
Part 2 Situation at 180600 UTC
Cold front [1] 32S116E 41S121E 44S120E to low 990hPa near 45S116E. Forecast
near 39S123E to dissipating low 992hPa near 46S125E at 190600UTC, just cold
front near 40S127E 44S129E at 191200UTC.
Cold front [2] 38S071E 43S080E 50S090E. Forecast near 37S095E 43S108E 50S112E
at 191200UTC.
Part 3 Forecast
Refer to latest warnings for details of the area affected.
South of line 39S080E 36S101E 36S122E 39S129E, outside warning areas:
Southwesterly quarter winds, turning clockwise within 540nm of low, shifting
northwesterly quarter within 600nm east of cold fronts. 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,
increasing to moderate to heavy swell south of line 23S091E 21S103E 22S114E.
Rain areas, scattered showers and isolated thunderstorms mostly within 180nm of
fronts, within 420nm of low, and north of line 17S090E 27S113E. 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 Saturday.
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 July 2026
Part 1 Warnings
Nil.
Part 2 Situation at 180600 UTC
Low 1007hPa near 01S165E. Forecast low 1008hPa near 05S163E at 191200UTC.
Trough near 16S163E 25S167E. Forecast trough near 15S166E 25S167E at 191200UTC.
Part 3 Forecast
West of line EQ155E 13S160E 13S148E 25S158E:
Southeasterly quarter winds 15/25 knots, reaching up to 30 knots within 180nm
of the Australian coastline south of 21s, in the strait of Vitiaz, and within
60nm of line 03S153E 05S154E. Moderate to rough seas. Low swell, increasing to
low to moderate swell south of 15S.
East of line EQ164E 25S167E:
Easterly quarter winds 15/25 knots, reaching up to 30 knots south of 20S.
Moderate to rough seas. Low to moderate swell.
Remainder:
Winds not exceeding 20 knots. Slight to moderate seas. Low to moderate swell.
Rain areas, scattered showers and isolated thunderstorms throughout, becoming
heavy at times within 180nm of low and within 180nm east 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 Saturday.
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 JULY 2026
PART 1 WARNINGS
NIL.
PART 2 SITUATION AT 180600 UTC
EAST TO SOUTHEASTERLY TRADE FLOW.
PART 3 FORECAST
WITHIN 90NM OF LINE 07S101E 08S107E AND SOUTH OF LINE 08S115E EQ130E
14S138E:
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 SOUTH OF LINE 01S090E 04S101E AND 07S107E 09S115E.
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 20:15 UTC SATURDAY.=