Best tomorrow and Wednesday, average from then on
Western Australia Surf Forecast by Craig Brokensha (issued Monday 13th July)
Best Days: Tuesday, Wednesday
A fun weekend of surf across most coasts with a building good S/SW groundswell Saturday with offshore winds, easing from 4-6ft and 2ft yesterday across Margs and Perth respectively as offshores persisted. This morning the surf was smaller as we fell in between swells with offshores, but a new SW groundswell is due to build through the afternoon in the South West, reaching 4-6ft across the South West.
This week and weekend (Jul 14 – Jul 19)
This afternoon's pulse of SW groundswell will be reinforced by a similar sized S/SW groundswell tomorrow morning, generated by a late forming polar low in our swell window.
This should keep 4-6ft sets hitting the South West early, easing through the day, with 1-1.5ft waves around Perth. Wednesday will be smaller again.
Conditions look excellent over the coming days with a fresh and gusty E'ly tending variable breeze tomorrow and E/NE winds Wednesday.
A small lift in new SW groundswell is due Wednesday afternoon ahead of a better pulse Thursday afternoon.
This is being generated by a strong, broad and elongated but unfavourably aligned fetch of pre-frontal W/NW gales just east of Heard Island, with the frontal system due to push east while weakening into tomorrow.
Margs should build to the 6ft range on the sets at exposed spots, with Perth only seeing tiny 1-1.5ft waves continuing into the afternoon. Winds will become less favourable and stronger from the NE tending N/NE, limiting surfing options severely.
This will be related to a deepening surface trough moving in from the west, with Friday due to see easing swell with onshore N'ly tending W/NW and then SW winds.
Come the weekend, the surf is expected to continue to ease with lingering onshores in the South West, variable around Perth.
A new inconsistent W/SW groundswell is due Sunday, produced by a strong but small and unfavourably tracking low fro north of the Heard Island region Wednesday.
Only a small to moderate sized pulse is due, building through the afternoon to 3-5ft around Margs and 1ft+ in Perth. Winds look to freshen from the NW in any case, creating poor conditions around Margs.
Longer term we've got some larger SW groundswell on the cards for next week along with onshore winds, as a strong node of the Long Wave Trough strengthens across us. We'll have a closer look at this Wednesday though.