IDW11140
Australian Government Bureau of Meteorology
Western Australia
Issued at 1:01 pm WST on Monday 20 July 2026
for the period until midnight WST Thursday 23 July 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 ridge is pushing over the west coast with a weak cold front moving along the south coast south of the ridge later Monday into Tuesday. The ridge will then move south and strengthen in the wake of the cold front.
Winds: Westerly 15 to 20 knots, reaching up to 25 knots offshore east of Cape Leeuwin in the afternoon. Winds turning southwesterly in the evening. Seas: 1 to 1.5 metres, increasing to 1.5 to 2 metres offshore during the afternoon. Swell: Southwesterly 2.5 to 3 metres. Weather: Cloudy. 90% chance of showers.
Winds: Southwesterly 10 to 15 knots turning southerly in the evening. Seas: 1 to 1.5 metres, decreasing below 1 metre during the morning. Swell: Southwesterly 2.5 to 3 metres. Weather: Cloudy. 50% chance of showers.
Winds: South to southwesterly about 10 knots tending south to southeasterly 10 to 15 knots before dawn then decreasing to about 10 knots in the late afternoon. Seas: Below 1 metre. Swell: Southwesterly 2.5 to 3 metres inshore, increasing to 3 to 4 metres offshore east of Cape Leeuwin. Weather: Cloudy. 50% chance of showers.
Winds: East to southeasterly about 10 knots becoming north to northeasterly during the morning. Seas: Below 1 metre. Swell: Southwesterly 2.5 to 3 metres inshore, increasing to 2.5 to 4 metres offshore east of Cape Leeuwin. Weather: Partly cloudy.
Winds: Westerly 15 to 20 knots, reaching up to 25 knots offshore during the afternoon and evening. Seas: Around 1 metre, increasing to 1 to 2 metres during the afternoon. Swell: Southwesterly 2 to 2.5 metres. Weather: Cloudy. 80% chance of showers.
Winds: Southwesterly 15 to 20 knots. Seas: 1 to 1.5 metres, decreasing to 1 metre during the morning. Swell: Southwesterly 2 to 3 metres. Weather: Cloudy. 70% chance of showers.
Winds: Southwesterly 10 to 15 knots turning south to southeasterly below 10 knots during the morning. Seas: Below 1 metre. Swell: Southwesterly 3 metres, increasing to 3 to 4 metres during the morning. Weather: Partly cloudy. 50% chance of showers.
Winds: Variable below 10 knots. Seas: Below 0.5 metres. Swell: Southwesterly 3 to 4 metres, decreasing to 2.5 to 3 metres during the morning. Weather: Partly cloudy.
Winds: Westerly about 10 knots increasing to 10 to 15 knots in the evening. Winds reaching up to 20 knots west of Hopetoun in the late evening. Seas: Below 1 metre. Swell: Southwesterly 2 to 3 metres. Weather: Partly cloudy.
Winds: West to northwesterly 15 to 20 knots turning southwesterly early in the morning. Seas: Below 1 metre, increasing to 1 to 1.5 metres during the morning. Swell: Southwesterly 2 to 2.5 metres. Weather: Cloudy. 80% chance of showers.
Winds: Southwesterly 10 to 15 knots turning southerly during the morning. Seas: Around 1 metre. Swell: Southwesterly 2.5 to 3 metres, increasing to 3 to 4 metres during the morning. Weather: Partly cloudy. 70% chance of showers.
Winds: Variable about 10 knots. Seas: Below 1 metre. Swell: Southwesterly 3 to 4 metres, decreasing to 3 metres during the afternoon or evening. Weather: Partly cloudy.
Winds: South to southeasterly about 10 knots. Seas: Below 1 metre. Swell: Southwesterly 1.5 to 2 metres. Weather: Cloudy.
Winds: Variable about 10 knots becoming south to southwesterly 15 to 20 knots in the morning. Seas: Around 1 metre, increasing to 1 to 1.5 metres west of Eyre around midday. Swell: Southwesterly 1.5 to 2 metres. Weather: Mostly sunny. 50% chance of showers.
Winds: South to southwesterly 15 to 20 knots. Seas: 1 to 1.5 metres, decreasing to 1 metre during the morning. Swell: Southwesterly 1.5 to 2 metres, increasing to 2 to 3 metres during the morning. Weather: Cloudy. 70% chance of showers.
Winds: Southerly 10 to 15 knots turning southeasterly below 10 knots during the day. Seas: Around 1 metre. Swell: Southwesterly 2.5 to 3 metres, increasing to 3 to 4 metres east of Eyre. Weather: Partly cloudy.
The next routine forecast will be issued at 7:01 pm WST Monday.
* 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