Surf forecastStatisticsHistorical report

Lefthanders seasonal overview

Best Surf Season (March - May)

Western Australia’s autumn emerges as the prime window for Lefthanders. During these months, the Southern Ocean fires up consistent SW to WSW groundswells with average heights hovering in the 1.9-2.3m range and periods stretching into the 12.5-12.9s zone. Ideal offshore winds from the ENE to ESE quadrant blow most reliably—around 22-29% of the time—creating clean, hollow walls. High-pressure systems stall over the Bight, funneling light land breezes in the mornings before sea breezes kick in. This is when the wave quality peaks: punchy, rippable, and often with that long-period push.

Fair Surf Season (June - August & September - November)

Winter brings the biggest swells of the year—average heights climb to 2.6-2.8m with periods often exceeding 13s. However, the wind regime turns hostile: low-pressure systems parade across the Southern Ocean, dragging strong W to NW onshore winds that ruin the surface. Only 18-22% of the time do we see offshore flow, usually during brief post-frontal clearing. Spring (Sep-Nov) sees a gradual transition: swells remain sizable (2.2-2.6m) with long periods, but wind consistency wavers as synoptic patterns shift. Still, when a high settles in, expect some stellar sessions.

Low Surf Season (December - February)

Summer delivers the smallest and least consistent surf of the year. Swell heights average just 1.8-1.9m with periods dropping below 12s. The dominant SSE to S winds blow side-onshore or onshore for the west-southwest facing beach, keeping ideal offshore windows below 17%. Incoming tropical moisture and sea breezes often add chop. Only the occasional rogue SW groundswell from a Southern Ocean storm can salvage the swell—but overall, this is the time to travel or explore other spots.

Loading chart...

Conditions at Lefthanders in September

September: Transitional Swell, Mixed Winds

September begins the shift toward spring. Average swell height remains high at 2.6m with a long period of 13.2s. SW swell (28.4%) is the main player, with a solid wedge of WSW (15.9%) and a notable increase in SSW (4.8%). Wind quality hovers around 19% ideal. The wind regime is more variable: moderate E to ESE winds (ESE 4.8%, SE 5.5%) offer some offshore windows, but strong westerlies still frequent (W 12.1%, WSW 11.9%). The overall pattern is a mixed bag—some days are unsurfable, others produce clean, grinding lefts. The key is timing the passing highs.

Average Spot conditions at Lefthanders in September

Swell history for September

0 - 0.5
0.5 - 1
1 - 1.5
1.5 - 2.0
2.0 - 2.5
> 2.5 m

Wind history for September

0 - 10
10 - 20
20 - 30
30 - 40
40 - 50
> 50 km/h

Swell quality

Analyze the groundswell consistency at Lefthanders during September. Based on historical data, there is a % probability of groundswell occurring this month. The chart below provides a detailed breakdown of the average wave height distribution, offering deep insights into the swell quality and surf potential you can expect at Lefthanders for your next trip in September.

Ground swell

Ground swell by size

Wind conditions

Evaluate the wind and swell alignment at Lefthanders for September. Our analysis shows that favorable offshore or side-shore winds coincide with surfable swell approximately % of the time. The accompanying graph illustrates the average size distribution of waves during these optimal wind windows at Lefthanders.

Swell with good wind

Swell with good wind by size