For Mandurah :
No gale warning.
The reliability of the situation is very good.
Good clear periods but lots of cloud, too. No precipitation. In the evening, good clear periods but cloud building.
No precipitation. SW force 4 in the middle of the day becoming force 3 in the evening. Gusts reaching 17 knots in the middle of the day. Rough sea. Moderate, fairly long swell from WSW. Excellent visibility becoming excellent in the evening.