Poor building W/NW windswell tomorrow with strong NW winds, with a larger W/SW groundswell for Sunday as winds swing SW through the afternoon. Easing swell with light winds (offshore across Mandurah and Perth) Monday morning. Good long-period SW groundswell building Wednesday afternoon, cleanest and easing Thursday.

Good new W/SW groundswell tomorrow with favourable winds most of the day on the Surf Coast, better to the east Sunday. Small leftovers on Monday at magnets, with an acute new westerly swell Tuesday with uncertain winds.

Weak mid-period SW tending S/SW swell for later tomorrow and Saturday, easing into early next week ahead of a larger, stronger S/SW groundswell Tuesday afternoon and Wednesday. More swell late week and into the weekend.

Looks like a tricky couple of days ahead.