Saturday: Northwesterly 15/20 knots, reaching up to 25 knots offshore in the late evening. Seas: 2/2.5 metres. Swell: Southwesterly 2/2.5 metres. Sunday: Northerly 20/25 knots shifting southerly 15/25 knots in the early afternoon. Winds reaching up to 30 knots in the morning and again in the late evening. Seas: 2/3 metres, decreasing to 1/1.5 metres during the morning, then increasing to 1.5/2.5 metres during the afternoon. Swell: Southwesterly 2/2.5 metres, increasing to 2.5/4 metres during the morning. Weather: Heavy rain developing early in the morning, easing to scattered showers in the late afternoon. The chance of thunderstorms offshore, extending throughout. Outlook Monday: Southerly 20/25 knots increasing to 25/30 knots before dawn then decreasing to 15/25 knots early in the morning. Seas: 1.5/2.5 metres, decreasing to 1/1.5 metres during the morning, increasing to 1.5/2 metres offshore during the afternoon. Swell: Southwesterly 2/3 metres, increasing to 3/4 metres offshore. Weather: Isolated thunderstorms in the early morning. Outlook Tuesday: Southeasterly 15/20 knots tending southerly 10/15 knots during the afternoon. Seas: 1/1.5 metres, decreasing to 1 metre during the morning. Swell: Southwesterly 1.5/2.5 metres, increasing to 2.5/4 metres offshore.Issued Sat 22:00 WST
16:39 EST The mercury soared in the nation's southwest today with Perth recording its hottest September day on record, however heavy rain and cooler temperatures will arrive on Sunday.