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 21 May 2026
Part 1 Warnings
Refer to latest warnings for boundary of affected area and type of weather
system.
Melbourne Storm Force Warning 2.
Melbourne Gale Warning 6.
Part 2 Situation at 210600 UTC
Cold front [1] near 40S113E to low [1] 1004hPa 48S120E. Forecast near 37S127E
to low [1] 1010hPa 49S131E at 220300UTC, then decaying.
Trough [1] near 29S113E 35S120E. Forecast trough near 32S130E 47S133E 49S137E
at 221200UTC, just exiting east of area.
Trough [2] entering from west of area, near 29S077E to deepening low [2] 996hPa
near 33S084E. Forecast trough [2] near 31S090E 39S100E to low [2] 1001hPa near
42S101E at 220600UTC.
Cold front [2] near 42S080E 50S088E. Forecast near 44S102E 50S107E at 221200UTC.
Part 3 Forecast
Refer to latest warnings for details of the area affected.
South of line 30S080E 28S114E 35S116E 33S129E, outside warning areas:
Westerly quarter winds, shifting northwesterly quarter within 480nm east of
cold front [2] and trough [2], and 240nm within cold front [1], shifting
southwesterly quarter within 240nm west of cold front [1] and trough [1] and
turning clockwise within 240nm of lows. 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 mainly within 180nm of
trough/fronts and within 240nm of lows. Heavy at times within 120nm of trough
[2] and east of line 12S114E 22S115E. 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.
E
The next routine forecast will be issued at 21:00 UTC Thursday.
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 May 2026
Part 1 Warnings
Refer to latest warnings for boundary of affected area and type of weather
system.
Melbourne Storm Force Warning 2.
Melbourne Gale Warning 3.
Part 2 Situation at 210600 UTC
Trough 41S129E 44S134E. Forecast trough near 32S130E 47S133E 49S143E at
221200UTC
Cold front near 44S137E 50S149E. Forecast near 47S154E 49S160E at 220000UTC
then, east of area thereafter.
Low 1002hPa near 30S164E. Forecast near low 999hPa near 27S163E at 221200UTC.
Part 3 Forecast
Refer to latest warnings for details of the area affected.
East of line 25S153E 35S150E 42S163E, outside warning areas:
Clockwise within 540nm of low. Wind speeds 20/33 knots. Rough seas. Moderate to
heavy swell.
South of line 46S129E 44S146E 46S160E, outside warning areas:
Westerly quarter winds, northeasterly quarter east of cold front. 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,
increasing to moderate to heavy south of 43S.
Rain areas, scattered showers and isolated thunderstorms throughout. Heavy at
times within 240nm of trough, front 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 Thursday.
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 May 2026
Part 1 Warnings
Nil.
Part 2 Situation at 210600 UTC
Trough [1] near 17S167E 21S169E 25S167E. Forecast near 18S172E 22S172E 25S170E
at 211800UTC, exiting east of area.
Trough [2] near 02S150E 04S157E 13S168E. Forecast slow moving.
Part 3 Forecast
South of line 20S170E 20S167E 23S165E:
Northeasterly quarter winds 20/30 knots east of trough [1]. Rough seas. Low to
moderate swell.
South of line 08S142E 12S157E 23S165E:
Southeasterly quarter winds 15/25 knots, increasing to 20/30 knots south of
line 21S152E 23S163E. Moderate to rough seas. Low to moderate swell, increasing
to heavy swell south of line 21S152E 23S163E.
Remainder:
Winds not exceeding 20 knots. Slight to moderate seas. Low swell.
Rain areas, scattered showers and isolated thunderstorms throughout most of
area, heavy at times within 120nm of troughs. 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 Thursday.
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 MAY 2026
PART 1 WARNINGS
NIL.
PART 2 SITUATION AT 210600 UTC
TROUGH NEAR 04S094E 09S106E. FORECAST NEAR 01S094E 08S105E AT
221200UTC.
PART 3 FORECAST
SOUTH OF LINE 11S125E 07S130E 07S142E:
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 EQ097E 10S107E 12S114E.
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 THURSDAY.=