IDW11140
Australian Government Bureau of Meteorology
Western Australia
Issued at 8:03 am WST on Saturday 19 September 2026
for the period until midnight WST Monday 21 September 2026.
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.
A cold front is moving east across the south coast today, followed by a couple more weak fronts brushing past the south coast on the weekend. A new ridge will form along the southwest coast on Sunday before weakening on Monday. A trough developing inland will move east along the south coast on Tuesday ahead of the next cold front.
Winds: Westerly 20 to 30 knots, reaching up to 40 knots during the morning and early afternoon. Winds tending southwesterly 20 to 25 knots in the late evening. Seas: 3 to 4 metres, decreasing to 2 to 3 metres during the afternoon. Swell: Westerly 4 to 5 metres. Weather: Cloudy. 90% chance of showers. The chance of a thunderstorm east of Cape Leeuwin in the morning with possible squalls. Caution: Large and powerful surf conditions from this morning are expected to be hazardous for coastal activities such as swimming, surfing and rock fishing.
Winds: South to southwesterly 15 to 20 knots tending south to southeasterly 10 to 15 knots in the morning then tending northeast to southeasterly in the early afternoon. Seas: 1 to 2 metres, decreasing below 1 metre during the morning. Swell: Westerly 3 to 4 metres, tending southwesterly 3 to 4 metres during the morning. Weather: Cloudy. 50% chance of showers in the morning.
Winds: Northwest to northeasterly 10 to 15 knots tending west to northwesterly during the morning then becoming west to southwesterly about 10 knots during the afternoon. Seas: Below 1 metre. Swell: Southwesterly 3 to 4 metres, decreasing to 3 metres during the afternoon or evening. Weather: Cloudy.
Winds: West to northwesterly 25 to 30 knots, reaching up to 40 knots during the day. Winds tending west to southwesterly during the afternoon and evening. Seas: 2 to 4 metres. Swell: Westerly 3 to 5 metres. Weather: Cloudy. 90% chance of showers. The chance of a thunderstorm in the morning and early afternoon with possible squalls. Caution: Large and powerful surf conditions this afternoon and evening are expected to be hazardous for coastal activities such as swimming, surfing and rock fishing.
Winds: Southwesterly 20 to 25 knots, reaching up to 30 knots offshore east of Albany early in the morning. Winds tending southeast to southwesterly 15 to 20 knots in the early morning then tending northeast to southeasterly 10 to 15 knots in the early afternoon. Seas: 1.5 to 2.5 metres, decreasing to 1 to 1.5 metres during the morning, then decreasing below 1 metre around midday. Swell: Westerly 2.5 to 4 metres, tending southwesterly 2.5 to 4 metres during the morning. Weather: Cloudy. 60% chance of showers.
Winds: North to northeasterly 15 to 20 knots shifting south to southwesterly below 10 knots during the afternoon. Seas: Around 1 metre. Swell: Southwesterly 3 to 4 metres, decreasing to 3 metres during the evening. Weather: Partly cloudy.
Winds: Northwesterly 20 to 30 knots turning westerly in the middle of the day. Winds reaching up to 35 knots west of Hopetoun in the late afternoon. Seas: 1.5 to 2.5 metres. Swell: Southwesterly 1.5 to 2.5 metres, increasing to 2 to 4 metres west of Esperance during the afternoon. Weather: Partly cloudy. 60% chance of showers. The chance of a thunderstorm west of Esperance in the afternoon. Possible squalls with thunderstorms west of Hopetoun in the afternoon.
Winds: West to southwesterly 15 to 25 knots, reaching up to 30 knots east of Esperance early in the morning. Winds shifting east to southeasterly 10 to 15 knots in the late afternoon. Seas: 2 to 2.5 metres, decreasing to 1 to 1.5 metres during the morning, then decreasing to 1 metre around midday. Swell: Southwesterly 2 to 4 metres, decreasing to 2 to 3 metres during the morning, then increasing to 3 to 4 metres by early evening. Weather: Cloudy. 60% chance of showers.
Winds: Northeasterly 10 to 15 knots tending northeast to southeasterly 15 to 20 knots during the afternoon. Seas: Around 1 metre. Swell: Southwesterly 3 to 4 metres, decreasing to 3 metres during the evening. Weather: Partly cloudy.
Winds: Northwest to northeasterly 15 to 20 knots tending southeast to southwesterly 15 to 25 knots in the early afternoon. Winds reaching up to 30 knots east of Eyre in the evening. Squalls possible with the wind change. Seas: 1 to 1.5 metres, decreasing to 1 metre around midday, then increasing to 1 to 1.5 metres by early evening. Swell: Southwesterly around 1 metre, increasing to 1 to 1.5 metres during the afternoon, then decreasing to around 1 metre by early evening. Weather: Mostly sunny. The chance of a thunderstorm in the afternoon and evening.
Winds: Southwesterly 15 to 20 knots, reaching up to 30 knots west of Eyre early in the morning. Winds turning south to southeasterly 10 to 15 knots in the late afternoon. Seas: 1 to 2 metres, decreasing to 1 to 1.5 metres during the morning. Swell: Southwesterly 1 to 1.5 metres, increasing to 1.5 to 2.5 metres during the morning. Weather: Partly cloudy.
Winds: East to southeasterly 10 to 15 knots tending east to northeasterly 15 to 20 knots during the morning. Seas: Around 1 metre, increasing to 1 to 1.5 metres during the afternoon or evening. Swell: Southwesterly 2 to 3 metres. Weather: Partly cloudy.
The next routine forecast will be issued at 1:01 pm WST Saturday.
* Calls to 1300 numbers cost around 27.5c incl. GST, higher from mobiles or public phones. Marine forecasts are also available on VHF and HF radio. View the radio schedule on www.bom.gov.au/marine
Check the latest Coastal Waters Forecasts for information on wind, wave and weather conditions for neighbouring coastal zones