Western Australia Surf Forecast by Craig Brokensha (issued Monday 27th July)

Best Days: Lots of windows of cleaner conditions this week north of Margs, best in the South West from the weekend

Recap

The swell kicked in on Saturday with large though choppy waves across the South West, much better on Sunday and clean to 10-12ft+. Mandurah and Perth were OK early Saturday with a lift in swell, cleaner yesterday and to 3ft or so, 2-3ft in Perth.

Today the onshore winds have set back in across most locations (OK in Perth early) with a slight drop in swell from yesterday.

This week and weekend (Jul 28 - Aug 2)

We've got our varying week of waves and conditions this week as a conveyer belt of mid-latitude fronts push in from the west and through our swell window. Between each front though there should be windows of cleaner conditions and some good waves for those with the flexibility to move around them.

Size wise tomorrow we'll continue to fall between swells with a mix of windswell and mid-period energy along with average onshore W/SW winds across the South West, variable for a period around Perth and Mandurah with 2ft to occasionally 3ft sets.

A new W/SW groundswell for Wednesday is still on track, and winds will be great for Perth and Mandurah with a E/NE offshore, lingering onshore but workable for the keen in the South West with a light to moderate W'ly.

Size wise we should see surf mostly to 10-12ft across the South West, helped by some additional mid-period energy from a front pushing towards us tomorrow. Mandurah looks 3-4ft with 3ft sets across Perth.

The swell is then expected to start easing on Thursday and winds should become favourable for the South West early with a dawn N/NE-NE breeze, shifting NW through the day and strengthening, W/NW later, while not great it should be OK early across selected spots with easing 8-10ft sets. Perth and Mandurah will be clean.

The larger swell on the cards for late week looks a touch smaller though it'll still be a good'n with the stronger low that was forecast to generate now due to be a bit weaker.

We'll see a fetch of pre-frontal W/NW gales followed by a righter post-frontal W/SW fetch, with the long-period swell due to fill in Friday and provide 10-12ft waves across the South West, 3-4ft in Perth and 3ft across Mandurah.

Winds on Friday are a little suss but should improve with a morning SW'ly tending S/SE late in the day across the South West, while Perth and Mandurah should see dawn S/SE winds, S/SW into the afternoon.

The weekend is the pick with E'ly offshore winds and large easing surf from 8-10ft in the South West, while another large, new long-period SW groundswell should fill in Sunday under persistent E'ly winds. More on this Wednesday.