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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 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.

Leeuwin Coast: Cape Naturaliste to Walpole

Forecast for Tuesday 4 August until midnight

Gale Warning for Tuesday for Leeuwin Coast

Winds: Southeasterly 25 to 30 knots, reaching up to 40 knots during the morning. Seas: 3 to 4 metres, decreasing to 2.5 to 3 metres around midday. 1st Swell: Southeasterly 2 to 3 metres inshore, increasing to 3 to 5 metres offshore. 2nd Swell: Southwesterly 1 to 2 metres, decreasing to around 1 metre during the morning. Weather: Cloudy. 70% chance of showers. Caution: Dangerous surf conditions hazardous for coastal activities such as swimming, surfing and rock fishing. Tides likely to rise above the normal high tide mark.

Forecast for Wednesday 5 August

Strong Wind Warning for Wednesday for Leeuwin Coast

Winds: Southeasterly 15 to 25 knots, reaching up to 30 knots east of Cape Leeuwin early in the morning. Seas: 1.5 to 2.5 metres, decreasing to 1.5 metres around midday. 1st Swell: Southwesterly 1 to 1.5 metres, increasing to 2 to 3 metres during the morning, then increasing to 3 to 4 metres by early evening. 2nd Swell: Southeasterly 2 to 3 metres. Weather: Cloudy.

Forecast for Thursday 6 August

Winds: Southeasterly 15 to 20 knots. Seas: 1 to 1.5 metres. 1st Swell: Southwesterly 2.5 to 3 metres inshore, increasing to 2.5 to 4 metres offshore east of Cape Leeuwin. 2nd Swell: East to southeasterly 1.5 to 2.5 metres, decreasing to 1 to 1.5 metres during the afternoon or evening. Weather: Cloudy.

Albany Coast: Walpole to Bremer Bay

Forecast for Tuesday 4 August until midnight

Gale Warning for Tuesday for Albany Coast

Winds: Southeasterly 30 to 40 knots decreasing to 25 to 30 knots in the evening. Seas: 3 to 5 metres. 1st Swell: Easterly 4 to 5 metres, tending southeasterly 4 metres around midday. 2nd Swell: Southwesterly 1 to 1.5 metres, decreasing to around 1 metre during the morning. Weather: Cloudy. 80% chance of showers. The chance of a thunderstorm offshore east of Albany in the morning and early afternoon. Caution: Dangerous surf conditions hazardous for coastal activities such as swimming, surfing and rock fishing. Tides likely to rise above the normal high tide mark.

Forecast for Wednesday 5 August

Strong Wind Warning for Wednesday for Albany Coast

Winds: Southeasterly 20 to 30 knots decreasing to 15 to 25 knots in the morning. Seas: 2 to 3 metres, decreasing to 1.5 to 2 metres during the afternoon. 1st Swell: Southeasterly 4 metres, tending easterly 3 to 4 metres during the morning, then decreasing to 2.5 to 3 metres during the afternoon. 2nd Swell: Southwesterly 1 to 1.5 metres, increasing to 2 to 3 metres during the morning. Weather: Cloudy. 80% chance of showers. Caution: Dangerous surf conditions hazardous for coastal activities such as swimming, surfing and rock fishing. Tides likely to rise above the normal high tide mark.

Forecast for Thursday 6 August

Winds: South to southeasterly 15 to 20 knots. Seas: 1 to 1.5 metres, increasing to 1 to 2 metres inshore. 1st Swell: Southwesterly 2.5 to 3 metres. 2nd Swell: Easterly 2 to 3 metres, decreasing to 2 metres during the afternoon or evening. Weather: Cloudy.

Esperance Coast: Bremer Bay to Israelite Bay

Forecast for Tuesday 4 August until midnight

Gale Warning for Tuesday for Esperance Coast

Winds: Easterly 30 to 40 knots turning southeasterly 30 to 35 knots in the late morning and afternoon. Seas: 4 to 5 metres. 1st Swell: East to southeasterly 3 to 5 metres. 2nd Swell: Southwesterly 1 to 1.5 metres, decreasing to around 1 metre during the morning. Weather: Cloudy. Near 100% chance of rain. The chance of a thunderstorm. Caution: Dangerous surf conditions hazardous for coastal activities such as swimming, surfing and rock fishing. Tides likely to rise above the normal high tide mark.

Forecast for Wednesday 5 August

Gale Warning for Wednesday for Esperance Coast

Winds: Southeasterly 30 to 35 knots decreasing to 20 to 30 knots before dawn. Seas: 2.5 to 4 metres. 1st Swell: Southeasterly 3 to 5 metres. 2nd Swell: Southwesterly around 1 metre, increasing to 1.5 to 2.5 metres around midday. Weather: Cloudy. 95% chance of showers. The chance of a thunderstorm east of Esperance in the early morning. Caution: Dangerous surf conditions hazardous for coastal activities such as swimming, surfing and rock fishing. Tides likely to rise above the normal high tide mark.

Forecast for Thursday 6 August

Winds: South to southeasterly 20 to 30 knots. Seas: 2 to 3 metres, decreasing below 2 metres during the afternoon. 1st Swell: Southeasterly 2.5 to 4 metres, decreasing to 2 to 3 metres during the morning. 2nd Swell: Southwesterly 2 to 3 metres. Weather: Cloudy. 60% chance of showers.

Eucla Coast: Israelite Bay to WA-SA Border

Forecast for Tuesday 4 August until midnight

Gale Warning for Tuesday for Eucla Coast

Winds: Easterly 20 to 30 knots, reaching up to 35 knots during the morning. Seas: 3 to 4 metres, decreasing to 2 to 3 metres during the afternoon. 1st Swell: Easterly 2.5 to 3 metres, increasing to 3 to 4 metres during the morning. 2nd Swell: Southwesterly 1 to 1.5 metres, decreasing to around 1 metre during the afternoon. Weather: Cloudy. 90% chance of rain west of Eyre, 60% chance elsewhere. The chance of a thunderstorm.

Forecast for Wednesday 5 August

Gale Warning for Wednesday for Eucla Coast

Winds: East to northeasterly 20 to 30 knots turning south to southeasterly early in the morning. Winds reaching up to 35 knots west of Eyre in the afternoon. Seas: 2 to 4 metres. 1st Swell: East to southeasterly 3 to 4 metres. 2nd Swell: Southwesterly around 1 metre. Weather: Cloudy. 95% chance of showers. The chance of a thunderstorm in the morning and afternoon. Caution: Dangerous surf conditions in the west hazardous for coastal activities such as swimming, surfing and rock fishing. Tides likely to rise above the normal high tide mark.

Forecast for Thursday 6 August

Winds: Southeasterly 15 to 25 knots. Seas: 2 to 3 metres. 1st Swell: Southeasterly 2.5 to 3 metres. 2nd Swell: Southwesterly around 1 metre, increasing to 1 to 2 metres during the morning. Weather: Cloudy. 80% chance of showers. The chance of a thunderstorm in the morning.

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