Perth Local Waters Forecast: Two Rocks to Dawesville, inshore from Rottnest Island

View the current warnings for Western Australia

Forecast issued at 4:00 am WST on Wednesday 12 December 2018.

Weather Situation

A dissipating cold front will push north of Perth this morning with a ridge of high pressure developing rapidly in its wake this afternoon. By Thursday, the high pressure system will be well established over the Bight with another trough developing down the west coast. The trough will move inland during Friday evening.

Forecast for Wednesday until midnight

Winds
South to southeasterly 10 to 15 knots increasing to south to southwesterly 15 to 20 knots around midday, reaching up to 25 knots along the coastal fringe in the afternoon. Winds turning east to southeasterly below 10 knots in the late evening.
Seas
Around 1 metre, increasing to 1.5 to 2 metres during the afternoon.
Swell
Southwesterly 1.5 to 2.5 metres.
Weather
Cloud clearing.

Thursday 13 December

Winds
Easterly 15 to 20 knots becoming variable about 10 knots in the morning then becoming south to southwesterly 15 to 20 knots in the early afternoon.
Seas
Around 1 metre, increasing to 1 to 1.5 metres during the afternoon.
Swell
Southwesterly 1.5 to 2 metres, decreasing to 1 to 1.5 metres during the morning.
Weather
Sunny.

Friday 14 December

Winds
Variable about 10 knots becoming southerly 15 to 20 knots during the day.
Seas
Around 1 metre, increasing to 1 to 2 metres during the afternoon or evening.
Swell
Southwesterly 1 to 1.5 metres.
Weather
Mostly sunny.

Saturday 15 December

Winds
Southerly 15 to 25 knots increasing to 25 to 30 knots during the day.
Seas
1 to 2 metres, increasing to 2.5 to 3 metres during the afternoon.
Swell
Southwesterly 1 to 1.5 metres, increasing to 1.5 to 2.5 metres during the morning.
Weather
Partly cloudy. The chance of a thunderstorm in the morning and afternoon.

Please be awareWind gusts can be 40 percent stronger than the averages given here, and maximum waves may be up to twice the height. Wind warnings are issued for today and tomorrow and describe the highest category of wind warning for that day.

The next routine forecast will be issued at 4:00 pm WST Wednesday.

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