Western Australia

Wind 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.
Synoptic Situation: Gale force southwesterly winds in the wake of a cold front, before easing from Sunday evening. A ridge of high pressure developing across central WA will drift slowly southwards during Monday, remaining across or just to the south of Local Waters during Tuesday and Wednesday, leading to generally light winds.
Winds: West to southwesterly 25 to 30 knots, reaching up to 40 knots during the morning and early afternoon. Winds turning southerly 20 to 30 knots in the late afternoon. Squalls in excess of 50 knots possible with showers and thunderstorms in the morning and early afternoon. Winds easing further to 15 to 20 knots during the evening.
Seas: 3 to 4 metres, decreasing to 2.5 metres by early evening.
Swell 1: West to southwesterly 3 to 4 metres, increasing to 4 to 6 metres during the morning, then tending southwesterly 4 to 5 metres by early evening.
Weather: Cloudy. 95% chance of showers. The chance of a thunderstorm in the early morning. Caution: Dangerous surf conditions hazardous for coastal activities such as swimming, surfing and rock fishing.
Winds: South to southeasterly 10 to 15 knots shifting north to northeasterly during the morning then becoming variable about 10 knots in the early afternoon.
Seas: 1 to 2 metres, decreasing below 1 metre during the morning.
Swell 1: Southwesterly 3 to 5 metres, decreasing to 2 to 3 metres during the morning.
Weather: Cloudy. 50% chance of showers. Caution: Dangerous surf conditions hazardous for coastal activities such as swimming, surfing and rock fishing in the morning.
Winds: Variable below 10 knots.
Seas: Below 0.5 metres.
Swell 1: Southwesterly 1.5 to 2.5 metres, decreasing to 1 to 1.5 metres during the evening.
Weather: Cloudy. 70% chance of showers.
Winds: East to northeasterly below 10 knots becoming south to southeasterly during the afternoon.
Seas: Below 0.5 metres.
Swell 1: Southwesterly 1 to 1.5 metres, increasing to 1.5 to 2.5 metres during the morning.
Weather: Partly cloudy.

Perth and Melville Local Waters

Sunday 1 August

Synoptic Situation: Gale force southwesterly winds in the wake of a cold front, before easing from Sunday evening. A ridge of high pressure developing across central WA will drift slowly southwards during Monday, remaining across or just to the south of Local Waters during Tuesday and Wednesday, leading to generally light winds.

Sunday 1 August

Winds: West to southwesterly 25 to 30 knots, reaching up to 40 knots during the morning and early afternoon. Winds turning southerly 20 to 30 knots in the late afternoon. Squalls in excess of 50 knots possible with showers and thunderstorms in the morning and early afternoon. Winds easing further to 15 to 20 knots during the evening.
Seas: 3 to 4 metres, decreasing to 2.5 metres by early evening.
Swell 1: West to southwesterly 3 to 4 metres, increasing to 4 to 6 metres during the morning, then tending southwesterly 4 to 5 metres by early evening.
Weather: Cloudy. 95% chance of showers. The chance of a thunderstorm in the early morning. Caution: Dangerous surf conditions hazardous for coastal activities such as swimming, surfing and rock fishing.

Monday 2 August

Winds: South to southeasterly 10 to 15 knots shifting north to northeasterly during the morning then becoming variable about 10 knots in the early afternoon.
Seas: 1 to 2 metres, decreasing below 1 metre during the morning.
Swell 1: Southwesterly 3 to 5 metres, decreasing to 2 to 3 metres during the morning.
Weather: Cloudy. 50% chance of showers. Caution: Dangerous surf conditions hazardous for coastal activities such as swimming, surfing and rock fishing in the morning.

Tuesday 3 August

Winds: Variable below 10 knots.
Seas: Below 0.5 metres.
Swell 1: Southwesterly 1.5 to 2.5 metres, decreasing to 1 to 1.5 metres during the evening.
Weather: Cloudy. 70% chance of showers.

Wednesday 4 August

Winds: East to northeasterly below 10 knots becoming south to southeasterly during the afternoon.
Seas: Below 0.5 metres.
Swell 1: Southwesterly 1 to 1.5 metres, increasing to 1.5 to 2.5 metres during the morning.
Weather: Partly cloudy.

Perth Local Waters

Sunday 1 August

Winds: West to southwesterly 25 to 30 knots, reaching up to 40 knots during the morning and early afternoon. Winds turning southerly 20 to 30 knots in the late afternoon. Squalls in excess of 50 knots possible with showers and thunderstorms in the morning and early afternoon. Winds easing further to 15 to 20 knots during the evening.
Seas: 3 to 4 metres, decreasing to 2.5 metres by early evening.
Swell 1: West to southwesterly 3 to 4 metres, increasing to 4 to 6 metres during the morning, then tending southwesterly 4 to 5 metres by early evening.
Weather: Cloudy. 95% chance of showers. The chance of a thunderstorm in the early morning. Caution: Dangerous surf conditions hazardous for coastal activities such as swimming, surfing and rock fishing.

Monday 2 August

Winds: South to southeasterly 10 to 15 knots shifting north to northeasterly during the morning then becoming variable about 10 knots in the early afternoon.
Seas: 1 to 2 metres, decreasing below 1 metre during the morning.
Swell 1: Southwesterly 3 to 5 metres, decreasing to 2 to 3 metres during the morning.
Weather: Cloudy. 50% chance of showers. Caution: Dangerous surf conditions hazardous for coastal activities such as swimming, surfing and rock fishing in the morning.

Tuesday 3 August

Winds: Variable below 10 knots.
Seas: Below 0.5 metres.
Swell 1: Southwesterly 1.5 to 2.5 metres, decreasing to 1 to 1.5 metres during the evening.
Weather: Cloudy. 70% chance of showers.

Wednesday 4 August

Winds: East to northeasterly below 10 knots becoming south to southeasterly during the afternoon.
Seas: Below 0.5 metres.
Swell 1: Southwesterly 1 to 1.5 metres, increasing to 1.5 to 2.5 metres during the morning.
Weather: Partly cloudy.