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 Sunday 7 December 2025.

Weather Situation

A trough develops through inland parts of the South West Land Division today. The trough moves eastward on Monday as a weak cold front brushes the far south coast. The next high pressure ridge forms over the far south of the state from Tuesday.

Forecast for Sunday until midnight

Winds
Southerly 15 to 20 knots.
Seas
Below 1 metre, increasing to 1 to 1.5 metres during the afternoon.
Swell
Southwesterly 1.5 metres.
Weather
Mostly clear.

Monday 8 December

Winds
Southerly 15 to 25 knots.
Seas
1 to 1.5 metres, increasing to 1.5 to 2 metres during the afternoon.
Swell
Southwesterly 1.5 metres, increasing to 1.5 to 2 metres during the morning, then decreasing to 1.5 metres around midday.
Weather
Cloud clearing.

Tuesday 9 December

Winds
South to southeasterly 15 to 25 knots becoming southerly 20 to 30 knots in the evening then decreasing to 20 to 25 knots in the late evening.
Seas
1.5 to 2 metres, decreasing to 1 to 1.5 metres during the morning, then increasing to 1.5 to 2 metres during the afternoon.
Swell
Southwesterly 1 to 1.5 metres, increasing to 1.5 to 2 metres during the morning.
Weather
Sunny.

Wednesday 10 December

Winds
Southeasterly 15 to 20 knots turning southerly during the day.
Seas
1.5 to 2 metres, decreasing to 1 to 1.5 metres during the morning.
Swell
Southwesterly 1.5 to 2 metres.
Weather
Sunny.

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 7:01 pm WST Sunday.

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