Western Australia Surf Forecast by Craig Brokensha (issued Wednesday 13th September)

Best Days: Thursday, Friday, Saturday morning Perth and Mandurah, Monday morning

Recap

Poor conditions yesterday across all coasts with a mix of easing SW groundswell from Monday, windswell and building SW swell into the afternoon.

Today is excellent with pumping waves across all locations with a large easing SW groundswell and offshore winds.

This week and weekend (Sep 14 – 17)

These notes will be brief as Ben’s away today.

Today's swell should continue to ease into tomorrow and conditions will remain great with light morning offshores, becoming variable into the afternoon ahead of possible sea breezes.

Our new SW groundswell building through Friday and easing Saturday is still on track, with the strong and slow moving polar low linked to the swell currently weakening to our south-west.

We should see the swell building through Friday, reaching 6ft to occasionally 8ft by dark with 2ft sets to the north, easing back Saturday from 6ft on the sets across the South West and 2ft+ further north.

Conditions will be great again Friday with E'ly tending variable winds, while an approaching front will bring onshore W'ly winds Saturday (variable early across Perth and Mandurah).

Our next swell will arrive out of the W/SW with a tight and intense mid-latitude low is forecast to form north of the Heard Island region tomorrow, with a fetch of severe-gale W'ly winds being projected through our western swell window as the low dips east-southeast.

This will generate a moderate to large sized W/SW groundswell that's expected to build later Sunday and peak Monday morning.

The low will be absorbed into the westerly storm track on the weekend, with it due to re-intensify, generating storm-force W/SW winds in our southern swell window, producing a larger long-period S/SW groundswell for late Monday and Tuesday morning.

The W/SW swell should come in around 2-3ft across Perth Monday morning and 6ft in the South West with early variable winds, tending N/NW through the day and then NW Tuesday. We'll have a closer look at this Friday.