Western Australian Surf Forecast by Craig Brokensha (issued Monday July 11th)

Best Days: Keen surfers tomorrow Perth and Mandurah, Wednesday morning all locations, Saturday, Sunday morning exposed breaks

Features of the Forecast (tl;dr)

• Easing surf Tue with gusty W winds in Margs (N/NE early), mod NE tending N/NE in Perth and Mandurah through the AM, variable later
• New mid-period SW swell Wed with NE tending NW winds (E/NE Perth and Mandurah), larger but less consistent Thu with strong N tending NW winds
• Large W'ly groundswell Fri AM with strong W/SW tending SW winds
• Easing W'ly swell Sat with S/SE winds (E/SE-SE in Perth and Mandurah during the AM)
• Easing surf Sun with E winds

Recap

Poor conditions across all locations on the weekend with small choppy surf Saturday, becoming bigger and messier through yesterday as a strong frontal progression pushed across us.

Today conditions have improved rapidly across Perth and Mandurah with clean 3ft and 3-4ft surf respectively, large and lumpy but decent in the South West.

This week and weekend (Jul 12 - 17)

The window between frontal systems is small this period, with another front due to move in tomorrow morning resulting in a gusty W’ly change across the South West (N/NE at dawn). Perth and Mandurah will be cleaner with moderate NE tending N/NE winds and then variable later in the day.

The current swell will continue to ease, dropping from 2ft to possibly 3ft across Mandurah, 2ft on the sets in Perth and the 6ft range in the South West.

Winds are due to swing back to the NE on Wednesday morning in the South West (E/NE further north) along with a new mid-period SW swell from a relatively weak front pushing up towards us today and tomorrow.

The South West should build back to 6ft+ with infrequent 2-3ft sets in Mandurah and 2ft sets across Perth and winds look to be favourable most of the day.

On Thursday a less consistent but stronger SW groundswell from the earlier stages of the front generating Wednesday’s swell is due to fill in.

There’ll be a wait for sets but the South West should see 6ft to occasionally 8ft waves with locations further north offering similar sized waves to Wednesday. Unfortunately an intense but weakening low moving in from the west will bring strengthening N tending NW winds on Thursday (N/NE early in Perth and Mandurah).

This low will generate a large W/SW groundswell for Friday morning as winds swing W/SW to SW in the wake of the low. Margs looks to come in around 10ft with 4ft waves in Mandurah, 3-4ft across Perth though with those poor winds.

Saturday and Sunday look much better as a high moves in, swinging winds to the S/SE on the former and E on the latter. The swell will drop quickly though due to the small scope of the low generating Friday’s size, with easing 6ft+ sets in the South West, 2-3ft Mandurah and Perth.

Sunday looks nice and clean but smaller again.

Longer term it looks like we’ll see mid-latitude fronts continuing to impact us through mid-late next week but more on this Wednesday.