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

View the current warnings for Western Australia

Forecast issued at 10:00 am WST on Wednesday 1 December 2021.

Weather Situation

A weak cold front will pass through the Southern Ocean during today as a ridge of high pressure remains in place over southern and western parts of WA. The ridge is expected to strengthen during Thursday night, while the high will move through the Southern Ocean on Friday and Saturday. This will result in fresher offshore winds across the west coast on Thursday and Friday night and delayed sea breezes during the subsequent afternoons.

Forecast for Wednesday until midnight

Strong Wind Warning for Wednesday for Perth Coast

Winds
Southeasterly 15 to 20 knots tending southerly 15 to 25 knots in the middle of the day then increasing to 25 to 30 knots in the evening.
Seas
1 to 1.5 metres, increasing to 1 to 2 metres during the afternoon.
Swell
Southwesterly 2 to 3 metres.
Weather
Partly cloudy.

Thursday 2 December

Strong Wind Warning for Thursday for Perth Coast

Winds
South to southeasterly 20 to 30 knots becoming southeasterly 15 to 25 knots before dawn then tending southerly 25 to 30 knots in the early afternoon.
Seas
2 to 2.5 metres, decreasing to 1 to 1.5 metres during the morning, then increasing to 2 to 3 metres around midday.
Swell
Southwesterly 3 metres, increasing to 3 to 4 metres during the morning, then decreasing to 3 metres by early evening.
Weather
Mostly sunny.

Friday 3 December

Winds
South to southeasterly 20 to 30 knots easing to 15 to 25 knots in the morning, then increasing to 20 to 30 knots in the late afternoon.
Seas
2 to 3 metres.
Swell
Southwesterly 2 to 3 metres, decreasing to 2 metres during the evening.
Weather
Mostly 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 4:00 pm WST Wednesday.

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