For Rottnest Island :
No gale warning.
The reliability of the situation is good.
Cloud and long sunny periods. Risk of some spots of rain in the morning, possibility of showers in late afternoon. In the evening, cloud and long sunny periods.
Chance of light rain. NE force 3 turning SW force 4 in the middle of the day then SSW. Gusts reaching 19 knots in the middle of the day. Moderate sea. Moderate, fairly long swell from WSW then low in the evening. Excellent visibility.