Western Australia Surf Forecast by Craig Brokensha (issued Wednesday 15th November)

Best Days: Dawn across the South West Saturday morning, dawn Sunday morning, Monday morning and Tuesday and Wednesday mornings

Recap

Easing surf from Monday with dropping sets from 4-5ft across the South West along with decent winds. Mandurah and Perth were still offering 2ft sets, but this morning we're back to the tiny stuff, with fading 3ft sets in the South West.

This week and weekend (Nov 16 - 19)

The surf will continue to bottom out into tomorrow.

Perth and Mandurah will be near flat, while the South West looks to only come in at 2ft across magnets along with favourable E/NE tending NE and then variable winds.

Our new SW swell and onshore winds for Friday are still expected, with a polar low in the Heard Island region earlier this week generating a pulse to 4-6ft across the South West and 1-1.5ft further north.

Unfortunately a trough moving in from the west will bring fresh N/NW tending NW breeze.

We may see a period of variable winds early Saturday as the SW groundswell eases, replaced by some weak mid-period W/SW swell into the afternoon, produced by the trough.

This swell will peak around 4-5ft across the South West and 1-2ft in Perth and Mandurah but winds will be onshore from the W/SW due to another approaching (but weakening) trough.

Variable winds may be seen into Sunday morning again as the swell starts to ease.

Of greater importance is the large SW groundswell due from the polar low firing up in the Heard Island region tomorrow and producing a good fetch of pre-frontal W/NW and then broader post-frontal W/SW gales through our swell window. The low will actually stall south-west of us over the weekend, with a secondary fetch of SW gales continuing in our swell window, resulting in a more prolonged swell event.

We may see an initial increase in SW groundswell through later Sunday, but the largest pulse is due Monday, building into the afternoon and holding Tuesday morning.

Margs should build to 6-8ft into the late afternoon with 2-3ft sets in Mandurah late, 2ft+ in Perth, easing slowly from a similar size on Tuesday morning.

Winds are still a little unsure for Monday but we'll likely see early variable breezes ahead of afternoon sea breezes, and then S/SE winds on Tuesday. Wednesday looks the cleanest with an E/SE offshore before sea breezes kick in again.

Longer term there's no new swell due until the following weekend, but more on this Friday.