Western Australian Surf Forecast by Craig Brokensha (issued Wednesday August 23rd)

Best Days: Today Perth and Mandurah, tomorrow morning all locations (Margs for the keen), Margs swell magnets Friday and Saturday morning, Monday morning Margs and Mandurah, Tuesday morning Margs

Features of the Forecast (tl;dr)

• Moderate sized, easing swell tomorrow with E/NE tending NW winds to the north, light-mod W/NW-NW in the South West
• Small, fading swell Fri with E/NE tending NW winds
• Small surf Sat (reinforcing S/SW swell for the PM) with E/NE tending NW winds
• Smaller Sun with W/NW winds (variable to the north)
• Moderate sized + S/SW groundswell for Mon with E-E/NE tending fresh S/SE winds
• Easing surf Tue with gusty E/SE winds

Recap

Great surf across Perth and Mandurah both yesterday and today with sets to 3ft, backing off a little into today to 2-3ft and 2ft+ respectively. The South West has offered size but an annoying, lingering onshore that's not too fresh but mostly ruining the swell.

This week and weekend (Aug 24 - 27)

Into the end of the week we've got easing swell, but the big question is will be see offshore winds develop tomorrow? In short unfortunately it looks unlikely with a light, lingering W/NW-NW breeze due to persist across the South West, adding lumps and bumps to the easing surf.

It'll be more surfable than today but only for the keen with easing sets from the 5-6ft range across the magnets. Perth and Mandurah look cleaner with an E/NE offshore but easing 1-2ft and 2ft waves respectively.

Friday looks smaller again and winds will finally turn offshore from the E, tending E/NE but with easing surf from the 4ft range. Try the magnets. Perth and Mandurah are likely to be 1-1.5ft.

The weekend looks generally smaller again with morning E/NE winds and weak sea breezes Saturday, smaller Sunday and with an onshore change as a trough clips us. There is a small 3-4ft or so of mid-period S/SW swell due Saturday afternoon from a short-lived burst of stong S/SW winds but with sea breezes

Our new S/SW groundswell for Monday is on track with a polar fetch of gale to severe-gale W/NW winds firing up to our south-west on Friday.

It'll be late in our swell window and not the best aimed but we should see a good 4-6ft of swell for the South West, 1-2ft Mandurah and 1-1.5ft in Perth with light E-E/NE winds, giving into a fresh S/SE change as another trough clips us.

Easing surf is due Tuesday with fresh E/SE winds, with nothing of note on the cards for the rest of the week.

Longer term it looks like we might see the Southern Ocean fire back up into late next week/weekend, bringing oversized, onshore surf into the following week but we'll review this again Friday.