Perth Coastal Waters Forecast: Two Rocks to Dawesville, offshore from Rottnest Island

View the current warnings for Western Australia

Forecast issued at 1:01 pm WST on Tuesday 21 April 2026.

Weather Situation

A cold front in the east is continuing to weaken and move east into South Australia, bringing the trough over the Eucla district with it. A ridge is making its way over southern WA tonight and into Wednesday, followed by a cold front that will move across the southwest on Thursday, and another on Friday.

Forecast for Tuesday until midnight

Winds
South to southwesterly 10 to 15 knots tending south to southeasterly below 10 knots in the early afternoon.
Seas
Around 1 metre.
Swell
Southwesterly 4 to 5 metres.
Weather
Cloudy.

Wednesday 22 April

Winds
Variable about 10 knots becoming west to northwesterly 15 to 20 knots in the evening.
Seas
Below 1 metre.
Swell
Southwesterly 3 to 4 metres, decreasing to 2.5 to 3 metres during the morning.
Weather
Partly cloudy.

Thursday 23 April

Winds
Northwesterly 20 to 25 knots increasing to 30 knots before turning west to southwesterly 15 to 25 knots during the morning.
Seas
1 to 1.5 metres, increasing to 1.5 to 2.5 metres during the morning, then decreasing to 1 metre during the afternoon.
Swell
Southwesterly 2 to 3 metres, tending westerly 3 to 4 metres during the morning.
Weather
Partly cloudy. 90% chance of showers. The chance of a thunderstorm in the early morning.

Friday 24 April

Winds
West to southwesterly 10 to 15 knots tending south to southwesterly below 10 knots during the morning.
Seas
Below 1 metre.
Swell
Southwesterly 3 to 4 metres, decreasing to 3 metres during the afternoon or evening.
Weather
Partly cloudy.

Please be awareWind 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.

Nearby Coastal Waters

NT - Beagle Bonaparte Gulf Coastal Waters Forecast WA - North Kimberley - Coastal Waters Forecast WA - West Kimberley - Coastal Waters Forecast WA - Pilbara Coast East - Coastal Waters Forecast WA - Pilbara Coast West - Coastal Waters Forecast WA - Ningaloo Coast - Coastal Waters Forecast WA - Gascoyne Coast - Coastal Waters Forecast WA - Geraldton Coast - Coastal Waters Forecast WA - Lancelin Coast - Coastal Waters Forecast WA - Melville Local Waters Forecast WA - Perth Local Waters Forecast WA - Perth Coast- Coastal Waters Forecast WA - Bunbury Geographe Coast - Coastal Waters Forecast SA - Far West Coast - Coastal Waters Forecast WA - Leeuwin Coast - Coastal Waters Forecast WA - Albany Coast - Coastal Waters Forecast WA - Esperance Coast - Coastal Waters Forecast WA - Eucla Coast - Coastal Waters Forecast

The next routine forecast will be issued at 7:01 pm WST Tuesday.

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