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

View the current warnings for Western Australia

Forecast issued at 4:00 pm WST on Saturday 19 July 2025.

Weather Situation

A ridge located nearby is moving east. A strong cold front will cross the Local Waters later Sunday afternoon or early evening. A new ridge will develop to the north of the Local Waters on Monday, maintaining a westerly flow across the southwest coast. Another cold front will move through southwest WA on Wednesday.

Forecast for Saturday until midnight

Winds
Northwesterly about 10 knots increasing to 15 to 20 knots in the evening.
Seas
Below 1 metre.
Swell
Southwesterly 2 to 3 metres.
Weather
Partly cloudy.

Sunday 20 July

Gale Warning for Sunday for Perth Local Waters

Winds
North to northwesterly 15 to 25 knots, reaching up to 35 knots during the afternoon. Winds shifting south to southwesterly 25 to 30 knots in the late afternoon.
Seas
1 to 2 metres, increasing to 2 to 3 metres during the morning.
Swell
West to southwesterly 2 to 3 metres.
Weather
Cloudy. Near 100% chance of rain. The chance of a thunderstorm in the afternoon and early evening, possibly severe.
Caution
Large and powerful surf conditions are expected to be hazardous for coastal activities such as swimming, surfing and rock fishing.

Monday 21 July

Winds
Southerly 20 to 30 knots tending south to southeasterly 15 to 25 knots before dawn then turning southwesterly 10 to 15 knots in the late morning.
Seas
2 to 3 metres, decreasing to 1 to 1.5 metres during the morning.
Swell
Southwesterly 2 to 3 metres.
Weather
Cloudy. 90% chance of showers.
Caution
Large and powerful surf conditions in the morning are expected to be hazardous for coastal activities such as swimming, surfing and rock fishing.

Tuesday 22 July

Winds
Southwesterly 10 to 15 knots turning westerly during the morning.
Seas
Below 1 metre.
Swell
Southwesterly 1.5 to 2 metres, decreasing to 1 to 1.5 metres during the morning.
Weather
Partly cloudy. 90% chance of showers.

Wednesday 23 July

Winds
Westerly 15 to 25 knots turning southwesterly 20 to 25 knots during the afternoon.
Seas
1 to 1.5 metres, 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 afternoon.
Weather
Cloudy. 95% chance of showers. The chance of a thunderstorm.

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.

The next routine forecast will be issued at 4:00 am WST Sunday.

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