Western Australian Forecast by Craig Brokensha (issued Friday November 22nd)

Best Days: Tomorrow morning in the South West, Sunday morning, Thursday and Friday mornings

Features of the Forecast (tl;dr)

• Small-mod sized mid-period SW swell building tomorrow PM, easing Sun
• E/SE winds ahead of sea breezes tomorrow (SE to the north), fresh SE Sun AM ahead of sea breezes
• Moderate sized SW swell Mon with strong S winds, easing Tue with strong but easing S/SE winds
• Large, long-period SW groundswell arriving late Wed, peaking Thu with E/SE tending S/SW winds
• Easing swell Fri with E/NE tending SW winds

Recap

The surf was onshore and average across all locations yesterday while Perth and Mandurah cleaned up a little into this morning but only came in at a weak 1-2ft.

This week and weekend (Nov 23 - Dec 6)

We’ll see conditions clean right up across all locations tomorrow morning as winds shift E/SE in the South West, more SE to the north.

Swell wise, today’s energy is due to ease back to the 4ft range in the South West, 1-1.5ft to the north but a fun pulse of new mid-period swell is due into the afternoon.

The source was a healthy but not overly strong low moving in from the west the past could of days and the South West should build to 4-5ft+ with a late kick to 1-2ft across Perth/Mandurah, easing Sunday.

Sea breezes will be in tomorrow afternoon with Sunday seeing fresh SE winds in the South West. E’ly to the north.

Monday looks to see another fun pulse of mid-period swell energy up to 4-6ft across the South West, 1-2ft Mandurah and 1-1.5ft Perth, generated by a trailing frontal system that’s currently moving in from the west.

While not overly strong, it’s healthy but local winds when the swell arrives on Monday look to revert back to a strong S’ly, with Tuesday offering strong S/SE winds as the swell eases.

Of greater significance is the large, long-period SW groundswell due into later Wednesday but more so Thursday.

The strong polar low linked to this swell is on track and we’re looking at a great fetch of severe-gale to storm-force W’ly winds firing up around the Heard Island region over the weekend.

A large swell should result, peaking Thursday morning to 10ft+ across the South West, 2-3ft Mandurah and 2ft in Perth under E/SE, morning offshore winds.

This looks like a great morning to pencil in with Friday also being favourable as the swell eases under an E/NE breeze.

Longer term it looks like onshore winds and a building W’ly swell is due next weekend, but more on this Monday. Have a great weekend!