Western Australia Surf Forecast by Craig Brokensha (issued Monday 9th December)

Best Days: Wednesday morning, Thursday morning in the South West, Friday morning in the South West, dawn Saturday

Recap

Average onshore waves across all regions on Saturday with a lift in swell, better Sunday with an additional W/SW swell and cleaner conditions in protected spots around Mandurah and Perth to 2ft and 1-2ft respectively.

Today all locations offered much cleaner conditions but with a drop in swell, best in the South West and to 3-4ft, tiny to the north.

This week and weekend (Dec 10 - 15)

We now look to our new inconsistent long-period W/SW groundswell for the coming days, with it being a little more prolonged than usual owing to it having a wagging tail (back end persistent fetch after the core winds).

This swell was generated in our far swell window, south-east of South Africa and then north of Heard Island, arriving through tomorrow and building slowly through the day, reaching 4-5ft+ by dark, 1-1.5ft to the north. A peak is still expected early Wednesday to 5-6ft on the sets in the South West, but very inconsistent and 1-2ft in Perth and Mandurah.

Conditions will be good in the mornings with a fresh SE-S/SE breeze tomorrow, better on Wednesday and SE-E/SE through the morning ahead of strong S/SW sea breezes.

Gusty but straight E-E/NE offshore winds on Thursday will greet the easing swell, tiny in Perth and Mandurah and to 1-1.5ft, but fun across the South West and likely to 3-5ft.

Friday will be smaller again but nice and clean with a morning E/NE offshore ahead of sea breezes.

We've now got a better outlook for the weekend, with a strong and intense low forecast to develop north of the Heard Island region, generating a fetch of gale to severe-gale W/SW winds, dipping east-southeast and away from our swell window.

A moderate to large and short-lived long-period W/SW groundswell is expected, building possibly on dark Friday but peaking Saturday to 6ft to occasionally 8ft in the South West, 2ft in Mandurah and 1-2ft across Perth.

Winds are good early but will swing from a dawn E/NE breeze to the S/SE and then SW, but we'll review this Wednesday. Sunday looks dicey with S'ly winds as the swell eases quickly and smaller surf to follow, but more on this Wednesday.