Western Australia Surf Forecast by Craig Brokensha (issued Wednesday 25th September)

Best Days: Tomorrow morning, Friday, Saturday morning, Sunday

Recap

Clean fun waves across the South West magnets yesterday morning, tiny to the north and poor across most locations this morning with onshore winds around Margs, though Mandurah saw a slight bump in swell and light winds.

This week and weekend (Sep 26 - 29)

Looking at the end of the week and our large SW groundswell is expected to build through tomorrow, peaking later in the day and then easing off slowly through Friday. This swell was generated by a strong and slow moving polar low to our south-west over the past few days.

Early morning will likely be a bit undersized but the swell will arrive through the morning, and build rapidly towards 10ft+ across the South West, 3ft+ in Mandurah and 2-3ft in Perth.

Winds should be S/SE across the South West in the morning, SE further north, with sea breezes now due across all locations into the afternoon.

Friday is the pick as the swell eases from 8-10ft, 3ft+ and 2-3ft respectively with excellent E/SE offshore winds, bumpy into the afternoon with sea breezes.

Winds won't be as favourable on Saturday and more from the S/SE-SE across all locations as the swell continues to drop in size.

Our secondary pulse of S/SW groundswell for later Saturday and more so Sunday is still on track with a secondary polar low forming east of the Heard Island region this evening and generating a fetch of severe-gale W'ly winds in our south-western and then southern swell windows.

The swell looks to be a touch smaller than tomorrow's but should offer large 8-10ft waves in the South West Sunday morning, 3ft in Mandurah on the sets and 2-3ft in Perth.

Winds look much better Sunday and offshore from the E/NE across all locations, NW into the afternoon and then onshore as the swell eases Monday.

Longer term a mid-period W/SW swell is due mid-week ahead of a more significant and large SW groundswell late week as a strong polar low forms in the southern Indian Ocean early next week, but more on this Friday.