Western Australia Surf Forecast by Craig Brokensha (issued Wednesday 19th December)

Best Days: Margs and Mandurah tomorrow morning, Margs magnets Friday morning, protected spots around Margs Sunday afternoon, Monday morning Margs and Mandurah, Tuesday morning Margs

Recap

Small to tiny and easing surf with average winds across the South West yesterday, cleaner in Perth and Mandurah.

This morning is more promising with a bump in new swell and offshore winds. We should see a new inconsistent SW groundswell building towards 3-5ft across the South West this afternoon (sets below look already there) tiny to the north.

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This week and next week (Dec 20 – 28)

This afternoon's increase in SW groundswell should hold into tomorrow morning, coming in at 3-5ft across the South West, tiny and to 1-1.5ft in Mandurah and 1ft around Perth.

Conditions should be nice and clean with an SE tending E/SE offshore tomorrow morning ahead of holding from the S/SE but strengthening into the afternoon in the South West, with sea breezes further north.

Friday will be smaller but good on the South West magnets with a gusty E/SE-E offshore, giving into sea breezes early-mid afternoon across all locations.

Saturday morning will be clean again but the surf bottoming out with no real size at all.

Our long-range and inconsistent mid-period swell due into Sunday and Monday is still on track, with a slow moving polar low just west of Heard Island, generating a fetch of strong to gale-force W/SW winds the last couple of days and this morning. The low will weaken into this evening, with an inconsistent SW groundswell arriving Sunday and building slowly to 4-5ft, and peaking Monday morning to 4-6ft.

Mandurah should offer very inconsistent 1-2ft sets Monday morning, tiny in Perth again. Winds look average and out of the S/SE on Sunday across the South West, strong into the afternoon with possibly slightly better SE winds Monday morning.

Tuesday looks cleaner again with an E/SE offshore as the swell becomes smaller.

Longer term we'll continue to see small to moderate levels of mid-period swell but with average winds as one of the fronts generating the swell pushes up and across us. More on this Friday.