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Bureau of Meteorology


Coastal Waters Forecast 

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IDW11140

Australian Government Bureau of Meteorology
Western Australia

Coastal Waters Forecast for Western Australia
Southern Zones: Cape Naturaliste to WA-SA Border

Issued at 10:00 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.

Leeuwin Coast: Cape Naturaliste to Walpole

Forecast for Tuesday 17 September until midnight

Winds: Southwesterly 10 to 15 knots tending westerly 15 to 20 knots in the morning. Winds reaching up to 25 knots offshore east of Cape Leeuwin in the late evening. Seas: Around 1 metre, increasing to 1 to 1.5 metres offshore east of Cape Leeuwin around midday. Swell: Southwesterly 1 to 1.5 metres inshore, increasing to 1.5 to 2 metres offshore east of Cape Leeuwin. Weather: Partly cloudy.

Forecast for Wednesday 18 September

Gale Warning for Wednesday for Leeuwin Coast

Winds: Northwesterly 20 to 25 knots, reaching up to 35 knots during the afternoon and evening. Winds turning southwesterly 25 to 30 knots in the late afternoon. Seas: 1.5 to 2.5 metres, increasing to 2.5 to 4 metres during the morning. Swell: Southwesterly 2 to 3 metres, increasing to 3 to 5 metres during the afternoon. Weather: Cloudy. 95% chance of showers, with possible hail east of Cape Leeuwin in the evening. The chance of a thunderstorm in the afternoon.

Forecast for Thursday 19 September

Winds: Southwesterly 20 to 30 knots decreasing to 15 to 20 knots during the day. Seas: 2 to 4 metres, decreasing to 1 to 2 metres during the afternoon. Swell: Southwesterly 5 to 6 metres. Weather: Cloudy. 70% chance of showers.

Albany Coast: Walpole to Bremer Bay

Forecast for Tuesday 17 September until midnight

Winds: Westerly 15 to 20 knots. Seas: Below 1 metre, increasing 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: Easterly around 1 metre. Weather: Mostly sunny.

Forecast for Wednesday 18 September

Gale Warning for Wednesday for Albany Coast

Winds: Northwesterly 15 to 25 knots increasing to 20 to 30 knots in the morning then tending westerly 25 to 30 knots in the early afternoon. Winds reaching up to 35 knots during the afternoon and evening. Seas: 1.5 to 2.5 metres, increasing to 2.5 to 4 metres around midday. 1st Swell: Southwesterly 2 to 3 metres, increasing to 3 to 4 metres around midday. 2nd Swell: Easterly below 1 metre, increasing to 1 to 1.5 metres during the afternoon. Weather: Cloudy. 95% chance of showers, with possible hail in the evening. The chance of a thunderstorm in the afternoon and early evening.

Forecast for Thursday 19 September

Winds: Southwesterly 20 to 30 knots decreasing to 15 to 20 knots during the afternoon. Seas: 2.5 to 4 metres, decreasing to 1.5 to 2.5 metres during the afternoon. Swell: Southwesterly 4 to 6 metres. Weather: Cloudy. 80% chance of showers.

Esperance Coast: Bremer Bay to Israelite Bay

Forecast for Tuesday 17 September until midnight

Winds: North to northeasterly 10 to 15 knots, reaching up to 20 knots east of Esperance during the day. Winds shifting south to southwesterly during the afternoon and evening. Seas: Around 1 metre, increasing to 1 to 2 metres east of Esperance. Swell: Southwesterly 1.5 to 2 metres, decreasing to 1 to 1.5 metres during the afternoon. Weather: Mostly sunny. The chance of a thunderstorm east of Esperance in the morning and early afternoon.

Forecast for Wednesday 18 September

Gale Warning for Wednesday for Esperance Coast

Winds: West to southwesterly 10 to 15 knots tending west to northwesterly 20 to 30 knots during the day. Winds reaching up to 35 knots west of Esperance in the late evening. Seas: 1 to 2 metres. 1st Swell: Southwesterly 1.5 to 2 metres, increasing to 2 to 3 metres during the morning. 2nd Swell: Easterly around 1 metre, increasing to 1 to 1.5 metres west of Esperance by early evening. Weather: Partly cloudy. 60% chance of showers in the late afternoon and evening. The chance of a thunderstorm west of Hopetoun in the late afternoon and evening.

Forecast for Thursday 19 September

Winds: Westerly 25 to 30 knots turning southwesterly 20 to 30 knots during the morning. Seas: 2 to 3 metres. 1st Swell: Southwesterly 3 to 5 metres. 2nd Swell: Easterly 1 to 2 metres, decreasing below 0.5 metres during the afternoon or evening. Weather: Cloudy. 80% chance of showers.

Eucla Coast: Israelite Bay to WA-SA Border

Forecast for Tuesday 17 September until midnight

Winds: East to northeasterly 15 to 20 knots. Seas: 1 to 2 metres. Swell: Southwesterly 1.5 to 2 metres, decreasing to 1.5 metres by early evening. Weather: Partly cloudy. The chance of a thunderstorm west of Eyre in the morning and early afternoon.

Forecast for Wednesday 18 September

Winds: Northeasterly 10 to 15 knots tending southeast to southwesterly in the middle of the day then tending northwest to northeasterly in the late evening. Seas: 1 to 1.5 metres, decreasing to 1 metre during the morning. 1st Swell: Southwesterly 1 to 1.5 metres, increasing to 1.5 to 2.5 metres around midday. 2nd Swell: Easterly around 1 metre. Weather: Mostly sunny.

Forecast for Thursday 19 September

Winds: West to northwesterly 15 to 20 knots turning southwesterly 20 to 30 knots during the morning. Seas: Around 1 metre, increasing to 2 to 3 metres during the morning. 1st Swell: Southwesterly 2 to 2.5 metres, increasing to 2 to 4 metres during the morning. 2nd Swell: Easterly 1 to 1.5 metres, decreasing below 0.5 metres during the afternoon or evening. Weather: Partly cloudy. 50% 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