South Australian Forecast by Craig Brokensha (issued Wednesday 30th November)

Best Days: Keen surfers at swell magnets on the South Coast tomorrow morning, Mid Coast later Friday through Sunday morning, South Coast Saturday morning and Sunday

Recap

Average surf across both coasts the last two days, with tiny waves on the Mid (flat today) and a variable wind and lumpy small swell down South yesterday, onshore today.

This week and weekend (Dec 1 - 4)

Tomorrow morning is the best time to surf the South Coast before the weekend, but the surf will be small and weak. Middleton should offer 1-2ft sets, with better 2-3ft waves at Waits and Parsons with a morning variable wind.

The Mid Coast is only due to be around 0.5ft if that.

Friday will start poor with onshore S/SW winds across both coasts and a small swell.

Into the afternoon though a new W/SW groundswell should start building across the Mid Coast, produced a deepening low pressure system south of WA today.

The initial fetch through the Mid Coast's swell window isn't as strong as forecast on Monday with a smaller increase to 1-2ft due by dark. Winds should tend S/SE though late, creating good conditions.

Through tomorrow and Friday though, a stronger fetch of gale to severe-gale W/SW winds will be aimed through our south-western swell window as the low stalls south-west of is before finally weakening and moving across Tasmania early Saturday.

With this a moderate to large SW groundswell will be generated, building Saturday ahead of a peak overnight and drop through Sunday.

The Mid Coast should see the most size Saturday with 2ft+ sets, easing from 2ft Sunday.

Middleton is expected to build from 3-4ft Saturday morning, with 5ft sets into the afternoon, easing from 3-5ft Sunday morning.

Clean conditions are due across both coasts each morning, with an E'ly offshore on the Mid Saturday and E/NE-NE winds down South.

Sunday is the pick down South though with a N/NE tendng N/NW breeze ahead of a late W/SW change.

Next week onwards (Dec 5 onwards)

Sunday's late change should bring a small new W/SW swell for the Mid Coast on Monday, coming in at 1-2ft but with onshore S/SW winds.

The South Coast will continue to ease but the onshore wind will create less than ideal conditions.

Longer term there's nothing too major on the cards besides small fun W/SW swells for the Mid. More on this Friday.