South Australian Forecast by Craig Brokensha (issued Friday 8th June)

Best Days: Both coasts Saturday, South Coast Sunday, keen surfers Mid Coast through the morning, South Coast Tuesday morning

Recap

Effectively flat across the South Coast yesterday, while a choppy NW windswell build through the day on the Mid.

Today we've got a new W'ly swell across both coasts, with the Mid seeing bumpy peaky 2ft waves with a N'ly wind, while the South Coast is still small to tiny but clean, best at swell magnets.

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This weekend and next week (Jun 9 - 15)

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This morning's acute W'ly swell is the precursor to a larger pulse of W/SW groundswell later today and tomorrow morning.

The W'ly energy was generated earlier this week as a severe low developed off the WA South Coast, generating an initial patchy of W'ly winds in our western swell window.

Since then we've seen the storm consolidate and push east while generating a fetch of strong to gale-force W/SW winds ideally towards us, with the storm now passing under us today.

A moderate to large sized W/SW groundswell is being created, with a late increase in size likely on dark today, with the bulk of the energy filling in overnight and peaking early tomorrow.

Middleton should provide plenty of size with sets to 4-5ft, while the Mid is due to come in at a great 2-3ft, easing through the day.

Conditions are looking good for both coasts with a light variable breeze through the morning and early afternoon, with possible weak sea breezes along the South Coast.

Sunday will be great down South with a moderate to fresh N/NE breeze and fairly good on the Mid with a NE-N/NE wind along with easing 2-3ft sets off Middleton and 1-2ft waves in the gulf.

Come Monday the swell will bottom out, and while the South Coast will be clean though blowy with a strong N/NE tending NW breeze, there'll be nothing to surf.

This strengthening northerly wind will be ahead of a deepening surface trough pushing in from the Bight, spawning off a much stronger mid-latitude frontal progression that is currently projecting towards WA.

The frontal progression will generate a fun new W/SW groundswell for Tuesday, with the trough possible bringing a late increase in windswell Monday, but more so Tuesday mixed in with the groundswell.

We're looking at inconsistent 2-3ft sets from the W/SW groundswell, with 2ft+ of windswell though with W'ly winds.

The swell will be really west and less than ideal for the South Coast, coming in at 2-3ft across Middleton, and clean with a morning W/NW breeze.

Looking at the longer term outlook and the models diverge a little surrounding a secondary mid-latitude front pushing in early-mid next week, bringing some new swell for Wednesday afternoon/Thursday, but beyond this a flurry of stronger storm activity south-west of WA looks to bring larger long-period swells from Friday and into the weekend.

More on this Monday though. Have a great weekend!