Western Australia Surf Forecast by Craig Brokensha (issued Wednesday 15th July)

Best Days: Desperate surfers selected spots early tomorrow Mandurah and Perth, Saturday Perth and Mandurah, Sunday, Monday Margs and Mandurah

Recap

Poor, choppy and stormy conditions across all locations yesterday with a jack in localised windswell and groundswell.

This morning the surf remained poor in the South West but oversized, better to the north though lumpy and bumpy to 3-4ft in Mandurah, 3ft in Perth.

This week and weekend (Jul 16 - 19)

These notes will be brief as Ben's on annual leave.

Looking to our south-west and we've got the broadening and weakening remnants of the storm linked to our XXL swell to end off the week.

This storm generated a fetch of severe-gale to storm-force W/SW-SW winds on top an active sea state and is now weakening but still generating a vast fetch of strong to gale-force SW winds over half the size of Australia.

Unfortunately this front and a secondary polar intensification on its tail will bring onshore winds for the peak of the swell.

Coming back to the size and tomorrow will see building mid-period energy from the remnants of the strong polar storm, but with strong N/NW tending W winds. Perth and less likely Mandurah may see N'ly winds at dawn though still moderate to fresh and with surf to 3ft+ or so.

Late in the day we may see sets from the new groundswell kicking to 15ft+ across the South West, with a peak overnight/Friday morning easing from 18-20ft. Mandurah should see 4-5ft sets and 3-4ft waves in Perth.

Unfortunately conditions will be poor across all locations with strong W/SW-SW winds, easing a touch out of the SW through the afternoon.

Saturday will remain onshore across the South West with strong SW winds, but Perth and Mandurah should see cleaner conditions with a light morning E/NE-NE breeze, tending variable ahead of weak afternoon sea breezes.

Size wise Mandurah should still be 3ft to occasionally 4ft, 2-3ft in Perth and easing.

Sunday still looks fun across all locations as a high moves in, swinging winds offshore from the SE tending E/SE though likely holding out of the SE into the afternoon.

The trailing polar front should help keep the size up as well to 6-8ft+ across the South West and 3ft in Mandurah on the sets, 2ft+ in Perth, with all coasts easing later.

There's plenty more on the cards for next week as a significant frontal progression bursts into the south-west Indian Ocean producing large and possibly oversized W/SW groundswells though with N'ly winds mid-week. More on this Friday.