Australian Government

Bureau of Meteorology


Coastal Waters Forecast 

Marine (lite) Home

IDW11130

Australian Government Bureau of Meteorology
Western Australia

Coastal Waters Forecast for Western Australia
Western Zones: North West Cape to Cape Naturaliste

Issued at 4:00 am WST on Tuesday 4 August 2020
for the period until midnight WST Thursday 6 August 2020.

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.

Warning Information

For latest warnings go to www.bom.gov.au, subscribe to RSS feeds, call 1300 659 210* or listen for warnings on relevant TV and radio broadcasts.

Weather Situation

A low pressure system lies just to the northeast of Perth and will contract eastwards across the south of the State during Tuesday, leading to strong to gale force southeasterly winds across southern waters. As the low moves east it will weaken, and on Wednesday will extend a trough through Eucla waters. A ridge of high pressure will slowly develop well to the south of the State in the wake of the low, with a high pressure centre crossing south of the Capes during Thursday evening.

Ningaloo Coast: North West Cape to Cape Cuvier

Forecast for Tuesday 4 August until midnight

Winds: South to southwesterly 10 to 15 knots, reaching up to 20 knots offshore south of Coral Bay in the late evening. Seas: 1.5 metres, decreasing to 1 metre during the morning. Swell: Southwesterly 2 to 3 metres. Weather: Cloudy.

Forecast for Wednesday 5 August

Winds: South to southeasterly 15 to 25 knots. Seas: 1 to 1.5 metres, increasing to 1 to 2 metres offshore south of Coral Bay. Swell: South to southwesterly 2 to 3 metres. Weather: Sunny.

Forecast for Thursday 6 August

Winds: Southeasterly 20 to 25 knots tending easterly 15 to 20 knots during the morning then tending southeast to southwesterly during the afternoon. Seas: 1.5 to 2.5 metres, decreasing to 1 metre during the afternoon. Swell: Southwesterly 2.5 to 3 metres. Weather: Sunny.

Gascoyne Coast: Cape Cuvier to Kalbarri

Forecast for Tuesday 4 August until midnight

Winds: Southwesterly 15 to 20 knots turning southerly in the evening. Winds reaching up to 25 knots offshore south of Denham during the morning and again in the late evening. Seas: 1.5 to 2.5 metres. Swell: South to southwesterly 2.5 to 4 metres. Weather: Partly cloudy.

Forecast for Wednesday 5 August

Winds: Southerly 20 to 25 knots turning southeasterly 15 to 25 knots before dawn. 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 Denham by early evening. Swell: Southerly 2 to 3 metres inshore, increasing to 2.5 to 4 metres offshore south of Denham. Weather: Mostly sunny.

Forecast for Thursday 6 August

Winds: Southeasterly 15 to 25 knots. Seas: 1.5 to 2 metres, decreasing to 1 to 1.5 metres during the afternoon. 1st Swell: Southwesterly 2 to 3 metres. 2nd Swell: Southeast to southwesterly around 1 metre. Weather: Mostly sunny.

Geraldton Coast: Kalbarri to Jurien Bay

Forecast for Tuesday 4 August until midnight

Strong Wind Warning for Tuesday for Geraldton Coast

Winds: Southwesterly 20 to 30 knots, turning southerly 15 to 25 knots in the morning. Winds strengthening 20 to 30 knots in the evening. Seas: 1.5 to 2.5 metres, decreasing to 1 to 1.5 metres during the morning, increasing to 2 metres offshore south of Geraldton by early evening. Swell: Southwesterly 2.5 to 4 metres. Weather: Partly cloudy. 60% chance of showers.

Forecast for Wednesday 5 August

Strong Wind Warning for Wednesday for Geraldton Coast

Winds: Southerly 15 to 20 knots, reaching up to 30 knots offshore early in the morning. Winds turning southeasterly before dawn. Seas: 1.5 to 2 metres. Swell: South to southwesterly 2 to 3 metres. Weather: Partly cloudy.

Forecast for Thursday 6 August

Winds: Southeasterly 15 to 20 knots. Seas: 1 to 2 metres, decreasing to 1 to 1.5 metres during the afternoon. Swell: Southwesterly 2 to 3 metres. Weather: Partly cloudy.

Lancelin Coast: Jurien Bay to Two Rocks

Forecast for Tuesday 4 August until midnight

Strong Wind Warning for Tuesday for Lancelin Coast

Winds: Southerly 15 to 25 knots. Winds turning southeasterly 20 to 30 knots in the late evening. Seas: 1.5 to 2.5 metres. Swell: Southwesterly 3 to 4 metres, tending southerly 2 to 3 metres during the morning. Weather: Partly cloudy. 60% chance of showers.

Forecast for Wednesday 5 August

Strong Wind Warning for Wednesday for Lancelin Coast

Winds: Southerly 20 to 25 knots, reaching up to 30 knots offshore early in the morning. Winds turning southeasterly 15 to 20 knots in the evening. Seas: 1.5 to 2.5 metres, decreasing to 1.5 metres during the afternoon. Swell: Southerly 1.5 to 2.5 metres, tending southwesterly 2 to 3 metres during the morning. Weather: Partly cloudy.

Forecast for Thursday 6 August

Winds: Southeasterly 15 to 20 knots. Seas: 1 to 1.5 metres, decreasing to 1 metre during the afternoon. Swell: Southwesterly 2.5 to 3 metres. Weather: Partly cloudy.

Perth Coast: Two Rocks to Dawesville

Forecast for Tuesday 4 August until midnight

Strong Wind Warning for Tuesday for Perth Coast

Winds: South to southeasterly 15 to 20 knots becoming southerly 20 to 25 knots in the early afternoon then increasing to 25 to 30 knots in the evening. Seas: 1 to 1.5 metres, increasing to 1.5 to 2.5 metres during the afternoon. Swell: South to southwesterly 2 to 3 metres, decreasing to 1 to 2 metres around midday, then tending southerly 1 to 2 metres during the afternoon. Weather: Partly cloudy. 50% chance of showers.

Forecast for Wednesday 5 August

Strong Wind Warning for Wednesday for Perth Coast

Winds: Southerly 25 to 30 knots decreasing to 20 to 25 knots before dawn then tending southeasterly 15 to 25 knots by late morning. Seas: 1.5 to 2.5 metres, decreasing to 1.5 metres during the afternoon. Swell: Southerly 1 to 1.5 metres, tending southwesterly 2 to 3 metres during the morning. Weather: Partly cloudy.

Forecast for Thursday 6 August

Winds: Southeasterly 15 to 20 knots. Seas: 1 to 1.5 metres, decreasing to 1 metre during the afternoon or evening. Swell: Southwesterly 2.5 to 3 metres. Weather: Partly cloudy.

Bunbury Geographe Coast: Dawesville to Cape Naturaliste

Forecast for Tuesday 4 August until midnight

Strong Wind Warning for Tuesday for Bunbury Geographe Coast

Winds: Southeasterly 15 to 25 knots. Winds reaching up to 30 knots offshore during the day. Seas: Around 1 metre, increasing to 2 to 3 metres during the morning. 1st Swell: Southerly 2 to 4 metres, decreasing to 2 to 3 metres during the morning, then tending south to southwesterly 1.5 to 2.5 metres around midday. 2nd Swell: Southwesterly 1.5 to 2.5 metres, decreasing to 1 to 1.5 metres during the afternoon. Weather: Partly cloudy. 50% chance of showers.

Forecast for Wednesday 5 August

Winds: Southeasterly 15 to 25 knots. Seas: 1.5 to 2.5 metres, decreasing to 1.5 metres around midday, then increasing to 1.5 to 2 metres by early evening. 1st Swell: Southwesterly 1 to 1.5 metres, increasing to 2 to 3 metres during the morning, then tending west to southwesterly 2 to 3 metres around midday. 2nd Swell: South to southwesterly 1 to 2 metres, decreasing to 1 to 1.5 metres during the morning. Weather: Partly cloudy.

Forecast for Thursday 6 August

Winds: Southeasterly 15 to 20 knots. Seas: 1 to 2 metres, decreasing to 1 metre during the afternoon. 1st Swell: Southwesterly 2 to 3 metres. 2nd Swell: Southerly around 1 metre. Weather: Partly cloudy.

The next routine forecast will be issued at 4:00 pm WST Tuesday.

* 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