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

View the current warnings for Western Australia

Forecast issued at 7:01 pm WST on Tuesday 24 March 2026.

Weather Situation

A trough over inland Gascoyne will move to the coast on Wednesday and shift offshore on Thursday before deepening, as a ridge strengthens over central and southern WA. Meanwhile, a cloud band extends over southeastern parts of the state and is slowly moving east. Towards the weekend, Ex-Tropical Cyclone Narelle will most likely approach the west coast from the north.

Forecast for Tuesday until midnight

Strong Wind Warning for Tuesday for Perth Coast

Winds
Southerly 20 to 30 knots tending southeasterly in the late evening.
Seas
2 to 2.5 metres.
Swell
Southwesterly 1 to 1.5 metres.
Weather
Clear.

Wednesday 25 March

Strong Wind Warning for Wednesday for Perth Coast

Winds
Southeasterly 20 to 30 knots decreasing to 15 to 25 knots in the early morning then increasing to 20 to 30 knots in the late evening.
Seas
1.5 to 2.5 metres.
Swell
South to southwesterly 1 to 1.5 metres, increasing to 1 to 2 metres during the morning, then tending southwesterly 1.5 to 2 metres around midday.
Weather
Cloud clearing.

Thursday 26 March

Winds
East to southeasterly 20 to 30 knots decreasing to 15 to 25 knots in the early morning.
Seas
1.5 to 2.5 metres, decreasing to 1 to 1.5 metres around midday.
Swell
Southwesterly 1 to 2 metres.
Weather
Partly cloudy. The chance of a thunderstorm.

Friday 27 March

Winds
Easterly 15 to 20 knots.
Seas
1 to 1.5 metres.
Swell
Southwesterly 1 to 2 metres, decreasing to 1 to 1.5 metres during the morning.
Weather
Cloudy. 95% chance of showers. The chance of a thunderstorm in the morning.

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

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The next routine forecast will be issued at 1:01 am WST Wednesday.

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