IDW11130
Australian Government Bureau of Meteorology
Western Australia
Issued at 10:00 pm WST on Sunday 18 May 2025
for the period until midnight WST Wednesday 21 May 2025.
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 high pressure ridge over southern WA is weakening. A weak cold front will cross the southwest coast on Monday, followed quickly by a new ridge of high pressure on Tuesday. A moderate cold front will approach southwest WA later Thursday.
Winds: Variable about 10 knots. Seas: Below 1 metre. 1st Swell: Southwesterly around 1 metre inshore, increasing to 1 to 1.5 metres offshore south of Coral Bay. 2nd Swell: Northeasterly below 1 metre, increasing to 1 to 1.5 metres north of Coral Bay. Weather: Clear.
Winds: Variable about 10 knots becoming southeasterly 10 to 15 knots in the morning then tending southerly 15 to 20 knots in the early afternoon. Seas: Below 1 metre, increasing to 1 to 1.5 metres offshore south of Coral Bay by early evening. 1st Swell: Southwesterly around 1 metre inshore, increasing to 1 to 1.5 metres offshore south of Coral Bay. 2nd Swell: Northeasterly around 1 metre. Weather: Sunny.
Winds: South to southeasterly 15 to 20 knots tending east to southeasterly early in the morning. Seas: Around 1 metre, increasing to 1 to 1.5 metres offshore. 1st Swell: Southwesterly around 1 metre inshore, increasing to 1 to 1.5 metres offshore. 2nd Swell: Northeasterly around 1 metre north of Coral Bay. Weather: Sunny.
Winds: East to southeasterly 15 to 20 knots. Seas: 1 to 2 metres, decreasing to 1 metre during the afternoon or evening. 1st Swell: Southwesterly 1 to 1.5 metres, increasing to 1.5 to 2.5 metres during the morning. 2nd Swell: East to northeasterly around 1 metre north of Coral Bay. Weather: Sunny.
Winds: South to southwesterly about 10 knots. Seas: Below 1 metre. Swell: Southwesterly around 1 metre inshore, increasing to 1 to 1.5 metres offshore. Weather: Clear.
Winds: South to southeasterly about 10 knots increasing to 15 to 20 knots in the middle of the day. Winds reaching up to 25 knots offshore south of Denham in the evening. Seas: Below 1 metre, increasing to 1 to 1.5 metres during the afternoon. Swell: Southwesterly around 1 metre inshore, increasing to 1 to 1.5 metres offshore. Weather: Sunny.
Winds: Southeasterly 15 to 20 knots. 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 around midday. Weather: Sunny.
Winds: East to southeasterly 15 to 20 knots. Seas: 1 to 2 metres, decreasing to 1 metre during the afternoon. Swell: Southwesterly 1.5 to 2.5 metres. Weather: Sunny.
Winds: Southeasterly about 10 knots. Seas: Below 1 metre. Swell: Southwesterly 1 to 1.5 metres. Weather: Clear.
Winds: Variable about 10 knots becoming southerly 15 to 20 knots in the middle of the day then tending southeasterly in the late evening. Seas: Below 1 metre, increasing to 1 to 1.5 metres during the afternoon. Swell: Southwesterly 1 to 1.5 metres, decreasing to around 1 metre by early evening. Weather: Sunny.
Winds: Southeasterly 15 to 20 knots. Seas: 1 to 1.5 metres. Swell: Southwesterly 1 to 1.5 metres, increasing to 2 to 3 metres during the morning. Weather: Sunny.
Winds: East to southeasterly 10 to 15 knots tending east to northeasterly during the morning then turning southeasterly during the afternoon. Seas: 1 to 1.5 metres, decreasing below 1 metre during the afternoon. Swell: Southwesterly 2 to 3 metres. Weather: Sunny.
Winds: Variable below 10 knots. Seas: Below 1 metre. Swell: Southwesterly around 1 metre inshore, increasing to 1.5 metres offshore. Weather: Clear.
Winds: Variable about 10 knots becoming southwesterly 10 to 15 knots in the morning then tending southerly 15 to 20 knots in the late afternoon. Seas: Below 1 metre, increasing to 1 to 1.5 metres during the afternoon. Swell: Southwesterly around 1 metre inshore, increasing to 1 to 1.5 metres offshore. Weather: Mostly sunny.
Winds: Southeasterly 15 to 20 knots turning easterly in the late evening. Seas: 1 to 1.5 metres, decreasing to 1 metre around midday. Swell: Southwesterly 2 to 3 metres, increasing to 3 to 4 metres around midday, then decreasing to 3 metres during the afternoon. Weather: Mostly sunny.
Winds: Easterly 10 to 15 knots tending northeasterly during the morning then becoming variable below 10 knots during the afternoon. Seas: 1 to 1.5 metres, decreasing to 1 metre during the morning. Swell: Southwesterly 2.5 to 3 metres. Weather: Sunny.
Winds: Variable about 10 knots. Seas: Below 1 metre. Swell: Southwesterly 1 to 1.5 metres. Weather: Clear.
Winds: Northwest to northeasterly 10 to 15 knots tending northwest to southwesterly 15 to 20 knots in the early morning then tending southerly 15 to 25 knots in the early afternoon. Seas: Below 1 metre, increasing to 1 to 1.5 metres during the morning, then increasing to 1.5 to 2 metres during the afternoon. Swell: Southwesterly 1 to 1.5 metres, increasing to 1.5 to 2 metres by early evening. Weather: Partly cloudy. 50% chance of showers.
Winds: Southeasterly 15 to 20 knots turning easterly 10 to 15 knots in the late evening. Seas: 1 to 2 metres, decreasing to 1 metre during the morning. Swell: Southwesterly 2 to 3 metres, increasing to 3 to 4 metres during the morning, then decreasing to 3 metres during the afternoon. Weather: Partly cloudy.
Winds: East to northeasterly 10 to 15 knots tending north to northeasterly below 10 knots during the morning. Seas: Around 1 metre. Swell: Southwesterly 2.5 to 3 metres, increasing to 3 to 4 metres during the evening. Weather: Sunny.
Winds: North to northwesterly 10 to 15 knots. Seas: Below 1 metre. Swell: Southwesterly around 1 metre inshore, increasing to 1 to 1.5 metres offshore. Weather: Clear.
Winds: West to northwesterly 15 to 25 knots, reaching up to 30 knots in the early afternoon. Winds shifting southerly in the early afternoon. Seas: 1 to 1.5 metres, increasing to 1 to 2 metres during the morning. Swell: Southwesterly 1 to 1.5 metres, increasing to 2 to 3 metres around midday. Weather: Partly cloudy. 60% chance of showers.
Winds: Southeasterly 10 to 15 knots turning easterly in the late evening. Seas: 1 to 1.5 metres, decreasing below 1 metre during the morning. Swell: Southwesterly 2 to 3 metres inshore, increasing to 2 to 4 metres offshore. Weather: Partly cloudy.
Winds: Easterly 10 to 15 knots turning north to northeasterly below 10 knots during the morning. Seas: Below 1 metre. Swell: Southwesterly 2 to 3 metres inshore, increasing to 2.5 to 4 metres offshore. Weather: Mostly sunny.
The next routine forecast will be issued at 4:00 am 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