IDW11130
Australian Government Bureau of Meteorology
Western Australia
Issued at 1:01 am WST on Tuesday 18 November 2025
for the period until midnight WST Thursday 20 November 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 firm ridge of high pressure extending over southern WA will gradually weaken today, contracting to the south coast on Wednesday and moving away. Meanwhile, a trough located offshore is deepening associated with a low pressure system. The trough and low pressure system will move across the west coast later Wednesday and further inland on Thursday.
Winds: Westerly about 10 knots increasing to 10 to 15 knots in the early afternoon. Seas: Below 1 metre. Swell: Southwesterly 1 to 1.5 metres inshore, increasing to 1.5 to 2 metres offshore. Weather: Partly cloudy.
Winds: Westerly 10 to 15 knots. Seas: Below 1 metre. Swell: Southwesterly 1 to 1.5 metres. Weather: Partly cloudy.
Winds: Southwesterly about 10 knots increasing to 10 to 15 knots during the afternoon. Seas: Around 1 metre. Swell: Southwesterly 1 to 1.5 metres. Weather: Mostly sunny.
Winds: Variable about 10 knots becoming north to northwesterly 10 to 15 knots in the morning then tending northwest to southwesterly in the early afternoon. Winds reaching up to 20 knots about Shark Bay in the late afternoon. Seas: Around 1 metre. Swell: Southwesterly 1 to 1.5 metres inshore, increasing to 1.5 to 2 metres offshore. Weather: Mostly sunny. The chance of a thunderstorm during the morning and afternoon.
Winds: Westerly 10 to 15 knots turning southwesterly in the evening. Seas: Below 1 metre. Swell: Southwesterly 1 to 1.5 metres inshore, increasing to 1.5 to 2 metres offshore south of Denham. Weather: Mostly sunny.
Winds: Southwesterly about 10 knots increasing to 15 to 20 knots during the morning. Seas: Below 1 metre, increasing to 1 to 1.5 metres during the afternoon or evening. Swell: Southwesterly 1 to 1.5 metres inshore, increasing to 1.5 to 2 metres offshore south of Denham. Weather: Partly cloudy.
Winds: South to southeasterly 10 to 15 knots turning easterly early in the morning then tending southeast to southwesterly in the morning. Winds reaching up to 20 knots offshore north of Geraldton early in the morning. Seas: Around 1 metre. Swell: Southwesterly 1.5 to 2.5 metres. Weather: Mostly sunny. The chance of a thunderstorm during the morning and afternoon.
Winds: Variable about 10 knots. Seas: Below 1 metre. Swell: Southwesterly 1.5 to 2 metres. Weather: Mostly sunny morning. The chance of a thunderstorm in the afternoon.
Winds: West to southwesterly about 10 knots increasing to 10 to 15 knots during the day. Seas: Around 1 metre. Swell: Southwesterly 1.5 to 2 metres. Weather: Partly cloudy. The chance of a thunderstorm in the afternoon.
Winds: South to southeasterly 10 to 15 knots, reaching up to 20 knots offshore early in the morning. Winds tending east to southeasterly in the early morning then tending south to southeasterly in the middle of the day. Seas: 1 to 1.5 metres, decreasing below 1 metre during the morning. Swell: Southwesterly 1.5 to 2.5 metres. Weather: Partly cloudy. The chance of a thunderstorm during this afternoon and early evening.
Winds: East to southeasterly 10 to 15 knots tending east to northeasterly before dawn then becoming variable about 10 knots in the early morning. Seas: Around 1 metre. Swell: Southwesterly 2 to 2.5 metres. Weather: Mostly sunny. The chance of a thunderstorm.
Winds: East to southeasterly 10 to 15 knots shifting southwesterly during the morning. Seas: Below 1 metre. Swell: Southwesterly 2 to 2.5 metres. Weather: Mostly sunny. The chance of a thunderstorm in the morning and afternoon.
Winds: South to southeasterly 15 to 25 knots tending east to southeasterly 15 to 20 knots in the morning then tending south to southeasterly 10 to 15 knots in the middle of the day. Seas: 1 to 2 metres, decreasing to 1 metre during the morning. Swell: Southwesterly 1.5 to 2 metres. Weather: Partly cloudy. The chance of a thunderstorm during this afternoon and evening.
Winds: East to southeasterly 15 to 20 knots turning southerly 10 to 15 knots in the late morning then tending southeasterly 15 to 20 knots in the late evening. Seas: 1 to 1.5 metres, decreasing to 1 metre around midday. Swell: Southwesterly 1.5 to 2 metres. Weather: Partly cloudy. The chance of a thunderstorm.
Winds: Southeasterly 15 to 20 knots turning south to southwesterly 10 to 15 knots during the day. Seas: 1 to 1.5 metres, decreasing below 1 metre during the afternoon. Swell: Southwesterly 1 to 2 metres. Weather: Partly cloudy. The chance of a thunderstorm in the morning and afternoon.
Winds: South to southeasterly 15 to 20 knots, reaching up to 30 knots offshore early in the morning. Seas: 1 to 2 metres, decreasing to 1 to 1.5 metres around midday. 1st Swell: Southwesterly 1 to 1.5 metres inshore, increasing to 1.5 to 2 metres offshore. 2nd Swell: Southerly around 1 metre, increasing to 1 to 1.5 metres by early evening. Weather: Partly cloudy. The chance of a thunderstorm during this afternoon and early evening.
Winds: East to southeasterly 15 to 20 knots turning southerly 10 to 15 knots in the afternoon then tending southeasterly 15 to 20 knots in the evening. Seas: 1 to 1.5 metres, decreasing to 1 metre around midday. 1st Swell: Southwesterly 1 to 1.5 metres inshore, increasing to 1 to 2 metres offshore. 2nd Swell: Southerly around 1 metre. Weather: Partly cloudy. 50% chance of showers. The chance of a thunderstorm.
Winds: Southeasterly 15 to 20 knots. Seas: 1 to 1.5 metres, decreasing below 1 metre during the afternoon. 1st Swell: Southwesterly 1 to 1.5 metres inshore, increasing to 1 to 2 metres offshore. 2nd Swell: Southeast to southwesterly 1 to 1.5 metres, decreasing to around 1 metre during the afternoon or evening. Weather: Partly cloudy. The chance of a thunderstorm.
The next routine forecast will be issued at 7:01 am WST Tuesday.
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