Western Australia Surf Forecast by Craig Brokensha (issued Wednesday 28th November)

Best Days: Protected spots tomorrow, early Friday morning, protected spots Sunday morning, Monday morning

Recap

Fun waves across the magnets in the South West yesterday to 3-4ft on the sets with much smaller waves at other breaks and tiny surf to the north. Conditions were clean all morning ahead of afternoon sea breezes.

This morning a building SW swell is providing good waves again across the South West with 4ft surf this morning with a SE offshore still tiny to the north. We should see the swell reach 4-6ft across the South West this afternoon, 1-2ft in Mandurah and 1-1.5ft in Perth but with sea breezes.

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This week and weekend (Nov 29 – Dec 2)

This afternoon's increase in swell will ease back into tomorrow morning, but be overridden by a new building SW groundswell that's due to peak overnight but hold a good size into Friday morning.

This has and is still being generated by a good fetch of W/SW gales developing east of Heard Island, projecting up towards the state, and now passing under us today.

We should see Margs build to 6-8ft tomorrow afternoon, 2-3ft in Mandurah later and 2ft in Perth, easing from similar sizes Friday morning.

Winds tomorrow aren't great and will be fresh out of the S/SE strengthening from the S'th into the afternoon across Margs, and tending more S/SW to the north.

Friday morning looks fun with a SE offshore, quickly tending back S/SW later morning as another front clips the state.

This front will actually be a deepening low pressure system, with it forecast to produce a strengthening fetch of W/SW-SW gale to severe-gales late in our south-western and southern swell windows.

A good new mid-period S/SW swell should build from this source on Saturday, reaching 6-8ft across Margs again later in the day, 2ft in Mandurah and 1-1.5ft in Perth but winds will still be onshore and out of the SW, possibly S/SE early around Perth and Mandurah.

Cleaner conditions are due Sunday to the north, but Margs still looks to see S/SE winds, favouring more protected spots as the swell eases rapidly.

Into next week there's nothing too significant on the cards swell wise and conditions look to deteriorate after Monday as a weak front clips the state Wednesday, followed by a mid-latitude front later week. We'll look at this again Friday.