Western Australia Surf Forecast by Craig Brokensha (issued Wednesday 7th September)

Best Days: Perth Friday morning, early Saturday, both coasts Sunday morning, South West early next week

Recap

Good conditions early yesterday with 2ft sets around Perth and 5-6ft sets in the South West. The afternoon was poor though with a gusty N/NW breeze developing across the state.

Today onshore stormy waves are being seen across the coast with strong onshore winds.

This week and weekend (Sep 8 - 11)

Today's large building storm swell is from the first of two vigorous fronts pushing into us.

The second is currently moving in from the west-southwest and will push across us later this afternoon, generating an additional large pulse of W/SW groundswell for tomorrow.

Large 12ft+ waves are due across the South West, 3-4ft in Perth with fresh onshore SW winds, easing back steadily through the late morning and then swinging more W/NW.

The swell should start easing later in the afternoon, easing more steadily from 8-10ft and 3ft respectively Friday morning.

Onshore winds will continue in the South West from the W/NW while Perth should see an early light offshore wind.

Our strong SW groundswell for Saturday is still on track, with a vigorous polar low currently forming east of Heard Island, to our south-west.

A pre-frontal fetch of W/NW gales will set in motion an active sea state for a stronger fetch of severe-gale to storm-force W/SW winds to move over.

The swell should fill in Saturday and reach 8-10ft across exposed breaks in the South West and 2ft+ in Perth.

Conditions will remain less than ideal around Margs with an early weak W/SW wind, giving into a S/SE change through the day. Perth should see variable tending light offshore winds early.

Sunday looks much better though with a fresh SE offshore across the South West and Perth (possibly E/SE) as the swell eases back from 6-8ft and 2ft respectively.

Next week onwards (Sep 12 onwards)

Good offshore E/SE winds are due into early next week as the SW swell continues to ease. This easing trend should be slowed slightly by a reinforcing S/SW groundswell Monday afternoon across the South West.

4-5ft+ waves are due, smaller into Tuesday.

Longer term some small to moderate sized S/SW groundswell is on the cards for Wednesday, with a slightly lager swell for Friday, but more on this in Friday's update.