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Conditions at Middleton in August
August: Swell Peak and Frontal Chases
August technically delivers the highest average swell height of the year at 1.5m (4.9ft), with the period locked at 12.4s. The swell direction continues the westerly theme - SW at 45.9%, SSW at 28.8%, WSW at 10.9% and W at 3.7% - meaning Middleton is once again catching the full breadth of the Great Australian Bight storm track. The height distribution skews slightly bigger than previous months: 21.3% of the SW swell runs 1-1.5m (3.3-4.9ft), while 10.8% pushes into the 1.5-2m (4.9-6.6ft) class, and 5.1% even reaches the 2-2.5m (6.6-8.2ft) range. These are proper winter waves.
Offshore winds ease back slightly to 45% but remain a dominant feature of the wind rose, with NNW (15.8%), NW (11.9%), WNW (11.4%) and W (9.3%) all strong. The water is at its coldest - 13.7°C - and air temps average just 11.6°C, while rainfall relaxes to 1.86 mm/day. If you can handle the cold, August is arguably Middleton's most dependable month for heavy, grinding, well-shaped surf.
Average Spot conditions at Middleton in August
Swell history for August
Wind history for August
Swell quality
Analyze the groundswell consistency at Middleton during August. 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 Middleton for your next trip in August.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Middleton for August. 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 Middleton.