IDW11130
Australian Government Bureau of Meteorology
Western Australia
Issued at 1:01 am WST on Sunday 18 January 2026
for the period until midnight WST Tuesday 20 January 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 trough continues moving east through central districts and along the south coast. A new ridge will develop about southwest WA in its wake, spanning along the south coast by Monday. A west coast trough will develop from Monday, remaining about the coast through to Wednesday.
Winds: Southerly 20 to 30 knots decreasing to 15 to 25 knots before dawn then tending south to southwesterly 20 to 30 knots in the late afternoon. Seas: 1.5 to 2.5 metres. Swell: South to southwesterly 1 to 2 metres inshore, increasing to 2 to 3 metres offshore. Weather: Sunny.
Winds: South to southwesterly 15 to 20 knots, reaching up to 30 knots south of Coral Bay early in the morning. Seas: 1.5 to 2.5 metres, decreasing to 1 to 1.5 metres during the morning, then increasing to 1 to 2 metres during the afternoon. Swell: South to southwesterly 1 to 2 metres inshore, increasing to 2 to 3 metres offshore. Weather: Sunny.
Winds: South to southwesterly 15 to 20 knots tending west to southwesterly during the afternoon then tending south to southwesterly during the evening. Seas: 1 to 2 metres, decreasing to 1 to 1.5 metres during the morning. Swell: Southwesterly 2 to 3 metres. Weather: Mostly sunny.
Winds: Southerly 20 to 30 knots. Seas: 1.5 to 2.5 metres. Swell: South to southwesterly 1.5 to 2.5 metres. Weather: Sunny.
Winds: Southerly 15 to 25 knots, reaching up to 30 knots offshore early in the morning. Seas: 1.5 to 2.5 metres. Swell: South to southwesterly 1.5 to 2.5 metres. Weather: Sunny.
Winds: Southerly 15 to 25 knots. Seas: 1 to 2 metres. Swell: Southwesterly 2 to 3 metres inshore, increasing to 2.5 to 4 metres offshore south of Denham. Weather: Sunny.
Winds: Southeasterly 15 to 25 knots turning southerly in the morning. Winds reaching up to 30 knots in the evening. Seas: 1.5 to 2.5 metres. Swell: Southwesterly 2 to 2.5 metres. Weather: Mostly sunny.
Winds: Southerly 15 to 25 knots. Seas: 1.5 to 2 metres, decreasing to 1 to 1.5 metres during the morning, increasing to 1.5 to 2 metres south of Geraldton during the afternoon. Swell: Southwesterly 2 metres, increasing to 2 to 3 metres during the morning. Weather: Sunny.
Winds: South to southeasterly 15 to 20 knots tending east to southeasterly 10 to 15 knots during the morning then turning southerly 15 to 25 knots during the day. Seas: 1 to 2 metres. Swell: Southwesterly 2.5 to 3 metres, increasing to 2.5 to 4 metres during the morning. Weather: Sunny.
Winds: Southerly 15 to 25 knots. Seas: 1 to 1.5 metres, increasing to 1.5 to 2 metres during the afternoon. Swell: Southwesterly 2 to 2.5 metres. Weather: Cloud clearing.
Winds: Southerly 15 to 25 knots. Seas: 2 metres, decreasing to 1 to 1.5 metres during the morning, increasing to 1.5 to 2 metres inshore during the afternoon. Swell: Southwesterly 2 metres, increasing to 2 to 3 metres during the morning. Weather: Sunny.
Winds: East to southeasterly 15 to 20 knots tending south to southeasterly 15 to 25 knots during the morning. Seas: 1.5 to 2 metres, decreasing to 1 to 1.5 metres during the morning. Swell: Southwesterly 2.5 to 3 metres inshore, increasing to 3 to 4 metres offshore. Weather: Sunny.
Winds: South to southeasterly 15 to 25 knots. Seas: 1 to 1.5 metres, decreasing to 1 metre during the morning, then increasing to 1 to 1.5 metres during the afternoon. Swell: Southwesterly 2 to 2.5 metres. Weather: Mostly sunny.
Winds: South to southeasterly 15 to 25 knots. Seas: 1.5 to 2 metres, decreasing to 1 to 1.5 metres during the morning. Swell: Southwesterly 2 metres, increasing to 2 to 3 metres during the morning. Weather: Sunny.
Winds: East to southeasterly 15 to 20 knots turning southerly during the day then tending southeasterly during the evening. Seas: 1 to 1.5 metres. Swell: Southwesterly 3 to 4 metres, decreasing to 2.5 to 3 metres during the afternoon. Weather: Sunny.
Winds: Southeasterly 15 to 20 knots turning southerly in the late morning. Winds reaching up to 25 knots offshore in the evening. Seas: Around 1 metre, increasing to 1 to 1.5 metres during the afternoon. Swell: Southwesterly 1.5 to 2.5 metres. Weather: Cloud clearing.
Winds: Southeasterly 15 to 20 knots, reaching up to 25 knots offshore early in the morning. Winds turning south to southwesterly in the late morning then tending south to southeasterly in the evening. Seas: 1 to 2 metres, decreasing below 1 metre during the morning, then increasing to 1 to 1.5 metres during the afternoon. Swell: Southwesterly 1.5 to 2 metres, increasing to 2 to 3 metres during the morning, then increasing to 2.5 to 4 metres by early evening. Weather: Sunny.
Winds: East to southeasterly 15 to 20 knots turning southerly during the morning then tending southeasterly during the evening. Seas: 1 to 1.5 metres, decreasing to 1 metre during the morning. Swell: Southwesterly 2.5 to 4 metres, decreasing to 2.5 to 3 metres during the afternoon. Weather: Sunny.
The next routine forecast will be issued at 7:01 am WST Sunday.
* 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