For Rottnest Island :
No gale warning.
The reliability of the situation is fairly good.
For the night from Sunday to Monday W force 1 turning NW in the middle of the night then NNE. Gusts reaching 6 knots in the early part of the night.
Rough sea. Moderate, fairly long swell from SW. Good visibility becoming good in the middle of the night then poor. Daytime of Monday 5 may : Improving during the day:the sky will clear.
Bright spells increasing during the morning, changeable skies becoming relatively cloud-free in the afternoon. Risk of showers in the morning, possibility of a few spots in the afternoon. In the evening, clear skies.
NNE force 1 freshening SW force 3 in the middle of the day then becoming SSE. Gusts reaching 12 knots in the middle of the day. Rough sea becoming moderate in the evening. Moderate, fairly long swell from SW. Poor visibility becoming excellent in the middle of the day then good.