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 August 2026
Part 1 Warnings
Refer to latest warnings for details of the area affected.
Melbourne Gale Warning 4.
Melbourne Gale Warning 5.
Part 2 Situation at 201800 UTC
Cold front [1] 44S140E 50S146E Forecast near 48S157E 50S160E at 211200UTC,
moving east of the area thereafter.
Cold front [2] entering area from the west near 46S123E to low 993hPa near
48S130E at 210300UTC. Forecast cold front [2] 42S146E 47S150E 50S152E at
220000UTC.
Trough 36S150E 45S160E. Forecast 34S155E 39S164E at 220000UTC.
Part 3 Forecast
Refer to latest warnings for details of the area affected.
South of line 37S129E 36S157E 38S164E, outside of warning areas:
Westerly quarter winds shifting southwesterly quarter winds west within 300nm
of fronts and trough. Winds becoming clockwise within 180nm of low. Wind speeds
20/33 knots. Moderate to rough seas. Low to moderate swell, rising to moderate
to heavy swell northwest of line 43S146E 50S133E.
Remainder:
Winds not exceeding 25 knots. Slight to moderate seas. Low to moderate swell.
Isolated showers south of line 42S129E 30S155E 33S167E, tending scattered
showers with isolated thunderstorms within 180nm of fronts and 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 09:00 UTC Friday.
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 2300 UTC 20 August 2026
Part 1 Warnings
Refer to latest warnings for boundary of affected area and type of weather
system.
Melbourne Gale Warning 2.
Melbourne Gale Warning 4.
Part 2 Situation at 201800 UTC
Cold front [1] 32S080E 42S092E to low [1] 987hPa near 48S090E to warm front [1]
46S101E. Forecast cold front [1] 31S096E 39S109E 48S114E to low [1] 985hPa near
48S102E to warm front [1] 50S104E 51S115E at 220000UTC.
Cold front [2] entering area from west near 40S078E to low [2] 989hPa near
46S080E at 211800UTC. Forecast cold front [2] 36S077E 46S086E to low [2] 987hPa
near 48S085E at 220000UTC.
Cold front [3] 47S113E to low [3] 995hPa near 48S118E to warm front [2]
47S121E. Forecast cold front [1] 44S125E 46S129E at 210600UTC, moving east of
the area thereafter.
Trough [1] 13S095E 23S111E. Forecast trough [1] near 14S095E 20S102E at
220000UTC.
Part 3 Forecast
Refer to latest warnings for details of the area affected.
South of line 35S080E 33S097E 41S110E 39S129E, outside warning areas:
Westerly quarter winds shifting northwesterly quarter winds within 120nm east
of trough [1] and 600nm east of cold fronts, and northeasterly quarter within
180nm south of warm fronts. Winds turning clockwise within 360nm of lows. Wind
speeds 20/33 knots. Rough to very rough seas. Moderate to heavy swell.
Remainder:
Winds not exceeding 25 knots. Slight to moderate seas. Low to moderate swell,
increasing to moderate to heavy south of 31S080E 32S109E 35S116E 35S129E.
Rain areas, scattered showers and isolated thunderstorms mostly within 360nm of
lows and within 180nm of fronts and 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 09:00 UTC Friday.
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 August 2026
Part 1 Warnings
Nil.
Part 2 Situation at 201800 UTC
Trough EQ163E to low 1007hPa near 06S163E to 15S170E, forecast slow moving.
Part 3 Forecast
Between lines EQ145E 07S146E 25S159E and EQ156E 06S158E 14S170E:
Southeasterly quarter winds 20/30 knots. Moderate to rough seas. Low to
moderate swell, decreasing to low northwest of line EQ154E 09S148E.
Remainder:
Winds not exceeding 20 knots. Slight to moderate seas. Low to moderate swell.
Rain areas, scattered showers and isolated thunderstorms mostly throughout
area. Becoming heavy north of line 08S153E 14S159E 19S170E. Isolated showers
elsewhere. 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 Friday.
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 AUGUST 2026
PART 1 WARNINGS
NIL.
PART 2 SITUATION AT 201800 UTC
NIL SIGNIFICANT FEATURES.
PART 3 FORECAST
EAST OF LINE EQ129E 03S108E 06S108E 12S114E:
SOUTHEASTERLY QUARTER WINDS 15/25 KNOTS. MODERATE TO ROUGH SEAS. LOW
SWELL,
INCREASING TO MODERATE SOUTH OF LINE 08S110E 09S114E 09S119E.
REMAINDER:
WINDS NOT EXCEEDING 20 KNOTS. SLIGHT TO MODERATE SEAS. LOW TO
MODERATE SWELL.
RAIN AREAS, SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS THROUGHOUT
AREA EXCEPT
SOUTH OF LINE 11S127E 08S108E 01S090E. 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 FRIDAY.=