Western Australian Surf Forecast by Craig Brokensha (issued Wednesday November 29th)

Best Days: Friday morning South West magnets, Monday morning, Tuesday morning, Wednesday morning in the South West

Features of the Forecast (tl;dr)

• Fading W/SW windswell tomorrow
• Small mid-period SW swell for tomorrow PM, easing Fri
• S/SE tending strong S/SW-SW winds tomorrow
• E/SE-ENE winds Fri AM ahead of sea breezes
• Fading swell Sat with weak W winds, possibly variable early
• Building mix of W/SW swells Sun with strong W/NW tending W/SW winds
• Large W/SW groundswell arriving late Sun, peaking Mon with light W/NW winds in the South West, E/SE-SE to the north, ahead of sea breezes
• Easing W/SW-SW swell Tue with S/SE tending S/SW winds
• Easing moderate sized swell Wed with SE tending S/SW winds

Recap

Poor surf yesterday with weak but freshening onshore winds through the day along with a weak, building windswell.

Today conditions are cleaner with 3ft surf across the South West, 2ft sets in Perth and Mandurah though still quite weak.

This week and next week (Nov 30 – Dec 8)

The current weak swell is due to ease back through tomorrow and winds will shift S/SE as the surface trough/low linked to the current average conditions weakens and breaks down.

Strong afternoon S/SW-SW sea breezes will kick in as a new pulse of small, mid-period SW swell peaks, generated by weak background frontal activity through the Southern Ocean.

This swell should reach 4ft in the South West with fading 1-2ft sets across Perth and Mandurah from the morning, with Friday easing back from 3ft+ across the South West.

Winds look great Friday morning, shifting E/SE-E/NE before sea breezes kick in.

Saturday will be smaller and with weak onshore winds, possibly variable at dawn but with no size.

Moving into Sunday an approaching front linked to a broad, weakening mid-latitude low will bring strong W/NW tending W/SW winds as it moves across us.

This will bring with it a mix of building windswell and mid-period energy on Sunday, but of greater importance is some stronger W/SW groundswell due later in the day but more so Monday.

The groundswell will be generated by the earlier stages of the mid-latitude low, with it forming south-east of South Africa yesterday. The low looks a touch stronger than forecast on Monday with a fetch of strong to at times, gale-force W/SW winds due to move slowly east towards us, weakening on approach Friday evening and Saturday morning.

This will generate a large W/SW groundswell for Monday morning, coming in at 8ft across the South West, 3ft in Mandurah and 2-3ft across Perth.

Winds look to remain onshore but ease through Monday across the South West, light from the W/NW offering workable options while Perth and Mandurah look offshore ahead of afternoon sea breezes.

We should see a high move in Tuesday following the front on Sunday/Monday, swinging winds around to the S/SE as the W/SW groundswell eases back from the 6ft range in the South West, 2-3ft Mandurah and 2ft Perth.

Winds will shift SE through Wednesday as the swell continues to ease. The easing trend will be slow thanks to a trailing weak fetch of SW winds on the backside of the low.

Longer term the outlook is active and better than it has been, more on this Friday.