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Bureau of Meteorology


Coastal Waters Forecast 

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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 17 September 2019
for the period until midnight WST Thursday 19 September 2019.

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 ridge of high pressure lies south of the state while a surface trough lies inland from the west coast. The trough will continue to move eastwards through inland parts through to Tuesday and moving east into South Australia on Wednesday. A strong cold front will move across southwestern parts later on Wednesday.

Ningaloo Coast: North West Cape to Cape Cuvier

Forecast for Tuesday 17 September until midnight

Winds: Southerly 15 to 20 knots. Seas: 1 to 1.5 metres, decreasing to 1 metre during the morning, then increasing to 1 to 1.5 metres by early evening. Swell: Southwesterly 2 to 2.5 metres. Weather: Sunny.

Forecast for Wednesday 18 September

Winds: Southerly 15 to 20 knots. Seas: 1 to 1.5 metres, decreasing to 1 metre during the morning, then increasing to 1 to 1.5 metres by early evening. Swell: Southwesterly 1 to 1.5 metres inshore, increasing to 1.5 to 2 metres offshore. Weather: Mostly sunny.

Forecast for Thursday 19 September

Winds: Southerly 20 to 30 knots. Seas: 1 to 2 metres. Swell: Southwesterly 1.5 metres, increasing to 1.5 to 2.5 metres during the morning. Weather: Partly cloudy.

Gascoyne Coast: Cape Cuvier to Kalbarri

Forecast for Tuesday 17 September until midnight

Winds: South to southeasterly 10 to 15 knots tending south to southwesterly 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 metres. Weather: Mostly sunny.

Forecast for Wednesday 18 September

Winds: Southerly 10 to 15 knots becoming variable about 10 knots in the morning then becoming southwesterly 15 to 20 knots in the early afternoon. Seas: Around 1 metre, increasing to 1 to 1.5 metres offshore south of Denham during the afternoon. Swell: Southwesterly 1 to 1.5 metres inshore, increasing to 1.5 to 2 metres offshore. Weather: Partly cloudy.

Forecast for Thursday 19 September

Winds: South to southwesterly 10 to 15 knots tending south to southeasterly 15 to 20 knots during the day. Seas: 1 to 1.5 metres, increasing to 1 to 2 metres during the morning. Swell: Southwesterly 1.5 to 2.5 metres, increasing to 2 to 4 metres during the morning. Weather: Partly cloudy.

Geraldton Coast: Kalbarri to Jurien Bay

Forecast for Tuesday 17 September until midnight

Winds: Variable about 10 knots becoming southwesterly 10 to 15 knots in the late afternoon. Seas: Below 1 metre. Swell: Southwesterly 1.5 to 2 metres, decreasing to 1.5 metres during the afternoon. Weather: Mostly sunny.

Forecast for Wednesday 18 September

Winds: West to southwesterly about 10 knots tending west to northwesterly 10 to 15 knots in the morning then tending west to southwesterly 15 to 20 knots in the early afternoon. Winds reaching up to 25 knots offshore south of Geraldton in the late evening. Seas: Below 1 metre, increasing to 1 to 2 metres around midday. Swell: Southwesterly 1.5 metres, increasing to 1.5 to 2.5 metres during the morning. Weather: Cloudy. 60% chance of showers.

Forecast for Thursday 19 September

Winds: South to southwesterly 20 to 25 knots tending south to southeasterly 15 to 20 knots during the day. Seas: 1.5 to 2 metres. Swell: Southwesterly 2 to 3 metres, increasing to 3 to 5 metres during the morning. Weather: Cloudy. 60% chance of showers.

Lancelin Coast: Jurien Bay to Two Rocks

Forecast for Tuesday 17 September until midnight

Winds: Variable below 10 knots becoming west to southwesterly 10 to 15 knots in the middle of the day then decreasing to about 10 knots in the evening. Seas: Below 1 metre. Swell: Southwesterly 1.5 to 2 metres, decreasing to 1.5 metres during the afternoon. Weather: Partly cloudy.

Forecast for Wednesday 18 September

Strong Wind Warning for Wednesday for Lancelin Coast

Winds: West to northwesterly about 10 knots increasing to 15 to 25 knots early in the morning then tending west to southwesterly 20 to 25 knots in the late afternoon. Winds reaching up to 30 knots offshore in the evening. Seas: Below 1 metre, increasing to 1.5 to 2.5 metres during the morning. Swell: Southwesterly 1.5 to 2 metres, increasing to 2 to 3 metres during the afternoon. Weather: Cloudy. 80% chance of showers.

Forecast for Thursday 19 September

Winds: Southwesterly 20 to 25 knots tending southerly 15 to 20 knots during the morning. Seas: 1.5 to 2.5 metres, decreasing to 1.5 metres during the afternoon. Swell: Southwesterly 3 metres, increasing to 3 to 5 metres during the morning. Weather: Cloudy. 60% chance of showers.

Perth Coast: Two Rocks to Dawesville

Forecast for Tuesday 17 September until midnight

Winds: West to southwesterly about 10 knots increasing to 10 to 15 knots in the late afternoon. Seas: Below 1 metre. Swell: Southwesterly 1.5 to 2 metres, decreasing to 1.5 metres around midday. Weather: Partly cloudy.

Forecast for Wednesday 18 September

Strong Wind Warning for Wednesday for Perth Coast

Winds: West to northwesterly 10 to 15 knots increasing to 15 to 25 knots in the morning then tending west to southwesterly 25 to 30 knots in the afternoon. Seas: Below 1 metre, increasing to 1 to 2 metres during the morning, then increasing to 2.5 to 3 metres during the afternoon. Swell: Southwesterly 1.5 to 2 metres, increasing to 2 to 3 metres around midday. Weather: Cloudy. 80% chance of showers.

Forecast for Thursday 19 September

Winds: Southwesterly 20 to 30 knots turning southerly 15 to 20 knots during the morning. Seas: 2 to 3 metres, decreasing to 1.5 to 2 metres during the morning. Swell: Southwesterly 3 to 5 metres. Weather: Cloudy. 60% chance of showers.

Bunbury Geographe Coast: Dawesville to Cape Naturaliste

Forecast for Tuesday 17 September until midnight

Winds: Southwesterly 10 to 15 knots turning westerly in the late morning and early afternoon. Seas: Around 1 metre. Swell: Southwesterly 1 to 1.5 metres inshore, increasing to 1.5 to 2 metres offshore. Weather: Partly cloudy.

Forecast for Wednesday 18 September

Strong Wind Warning for Wednesday for Bunbury Geographe Coast

Winds: West to northwesterly 15 to 20 knots, reaching up to 30 knots during the afternoon and evening. Winds tending west to southwesterly 20 to 25 knots in the early afternoon. Seas: Around 1 metre, increasing to 1 to 2 metres during the morning, then increasing to 2 to 3 metres around midday. 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: Cloudy. 90% chance of showers. The chance of a thunderstorm in the afternoon.

Forecast for Thursday 19 September

Winds: Southwesterly 20 to 30 knots turning southerly 15 to 20 knots during the day. Seas: 2 to 4 metres, decreasing to 1 to 2 metres during the morning. Swell: Southwesterly 3 to 5 metres. Weather: Cloudy. 60% chance of showers.

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