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 1100 UTC 21 July 2026
Part 1 Warnings
Refer to latest warnings for boundary of affected area and type of weather
system.
Melbourne Storm Force Wind Warning 10.
Melbourne Gale Warning 11.
Part 2 Situation at 210600 UTC
Cold front [1] near 40S127E 43S129E. Forecast east of area thereafter.
Warm front near 47S080E 47S089E 43S105E. Forecast warm front near 42S116E
50S106E at 221200UTC.
Cold front [2] near 32S073E 39S081E 45S081E to low 994hPa near 47S080E.
Forecast cold front [2] near 32S080E 42S087E 50S090E to low 989hPa near 50S082E
at 212100UTC with low south of area thereafter, then just cold front [2] near
31S081E 45S097E 50S098E at 221200UTC.
Forecast trough near 40S074E 45S078E 50S081E at 211800UTC, to enter area from
west, then trough near 44S088E 50S090E at 221200UTC.
Part 3 Forecast
Refer to latest warnings for details of the area affected.
North of line 22S090E 22S107E 25S113E:
Southeasterly quarter winds 20/30 knots. Rough seas. Low to moderate swell.
South of line 31S080E 44S106E 39S113E 39S129E, outside warning areas:
Southwesterly quarter winds, shifting northwesterly north of warm front, and
within 240nm east of trough, shifting easterly quarter south of warm front, and
turning clockwise within 180nm of low. 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 heavy south of line 42S101E 35S115E 35S129E.
Rain areas, scattered showers and isolated thunderstorms mostly within 240nm of
fronts, trough and 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 21:00 UTC Tuesday.
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 21 July 2026
Part 1 Warnings
Refer to latest warnings for boundary of affected area and type of weather
system.
Melbourne Storm Force Wind Warning 10.
Melbourne Gale Warning 11.
Part 2 Situation at 210600 UTC
Cold front near 43S129E 46S131E 50S131E 51S130E. Forecast cold front near
38S148E 46S158E 50S160E at 221200UTC.
Trough near 37S129E 50S141E. Forecast trough near 31S155E 44S161E at 221200UTC.
Part 3 Forecast
Refer to latest warnings for details of the area affected.
North of line 27S170E 25S154E:
Southeasterly quarter winds, wind speeds 20/33 knots until 211500UTC, then
decreasing to 15/25 knots thereafter. Rough to very rough seas, abating to
moderate to rough after 211500UTC. Moderate swell.
South of line 39S129E 39S149E 48S160E, outside warning areas:
Northwesterly quarter within 420nm east of front, shifting southwesterly
quarter west of front. 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 heavy swell south of line 35S129E 37S140E.
Rain areas, scattered showers and isolated thunderstorms mostly within 240nm of
front and 180nm 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 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 1100 UTC 21 July 2026
Part 1 Warnings
Nil.
Part 2 Situation at 210600 UTC
Trough near EQ159E to low 1008hPa 12S166E to 16S170E. Forecast trough EQ168E to
low 1009hPa near 12S171E to 13S177E at 221200UTC, with low just east of area.
Part 3 Forecast
WIthin 120nm of line EQ152E 12S166E.
Southwesterly quarter winds. Wind speeds 20/30 knots. Rough seas. Low to
moderate swell.
South of line 12S143E 18S157E 13S170E and within the Vitiaz strait:
Southeasterly quarter winds. Wind speeds 20/30 knots. Rough seas. Low swell
increasing to moderate south of 12S143E 18S157E 13S170E.
Remainder:
Winds not exceeding 20 knots. Slight to moderate seas. Low swell increasing to
moderate south of line 11S166E 11S142E.
Rain areas, scattered showers and isolated thunderstorms mostly within 360nm of
trough, and low and south of 10S. Heavy at times within 180nm 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 21:00 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 1100 UTC 21 JULY 2026
PART 1 WARNINGS
NIL.
PART 2 SITUATION AT 210600 UTC
EAST TO SOUTHEASTERLY TRADE FLOW.
PART 3 FORECAST
WEST OF LINE 03S101E 12S117E:
SOUTHEASTERLY QUARTER WINDS 15/25 KNOTS. MODERATE TO ROUGH SEAS. LOW
TO
MODERATE SWELL.
WITHIN 120NM OF LINE 04S124E 05S132E:
SOUTHEASTERLY QUARTER WINDS 15/25 KNOTS. MODERATE TO ROUGH SEAS. LOW
SWELL.
REMAINDER:
WINDS NOT EXCEEDING 20 KNOTS. SLIGHT TO MODERATE SEAS. LOW SWELL.
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS THROUGHOUT MOST OF 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 TUESDAY.=