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Margaret River - surf spot statistics
Margaret River seasonal overview
Best Surf Season (May - September)
Winter in the Southern Ocean unleashes its fury and Margaret River goes full-pumping. From May through September, the average swell hovers around a solid 2.3m to 2.8m, with periods consistently in the 12.9-13.3s range – that's powerful, long-period groundswell that wraps perfectly into the West-South-West facing coastline. The dominant swell directions shift to SW and WSW, the exact sweet spot for this stretch of coast. While onshore westerlies can be a menace, the prevalence of E to NE winds during high-pressure setups offers clean, glassy conditions especially in the mornings. This is prime time for pumping 1.5-2.5m plus waves at iconic spots like The Box and Mainbreak.
Fair Surf Season (April & October)
Shoulder months bring a transition period where the ocean is still very much alive. April and October see average swells between 2.0m and 2.2m with periods around 12.8-12.9s – solid and rippable. Wind ideal percentages climb to 29% in April thanks to more frequent easterly regimes, while October cools off slightly. These months can deliver fun, clean waves without the peak-winter crowds, making them a favorite for those seeking quality over quantity.
Low Surf Season (November - March)
Summer settles in and the Pacific High-pressure system dominates the Indian Ocean, suppressing the storm track. From November through March, average swell heights drop to 1.8-1.9m and periods slip to 11.8-12.5s. While still rideable, the swell tends to be more windswell-infused and less consistent. The wind regime is dominated by afternoon sea breezes – SSE to SW onshores that wreck wave quality. However, early morning offshore easterlies from the land breeze can still create short windows of fun, groveling waves in the 0.5-1.5m range. March stands out as the best of the low season with 21% ideal wind and longer average periods (12.5s), hinting at the approaching winter swell.
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Conditions at Margaret River in July
July: The Deepest of Winter
July is the absolute peak for swell size. Average swell height hits 2.8m with a period of 13.1s – epic, heavy, pumping. Swell direction is strongly SW (18.8%) and WSW (15.7%), but W (4.3%) and WNW (1.9%) ensure maximum energy arrives. The wind is the biggest challenge: ideal offshore wind occurs only 21% of the time. The prevailing winds are from the NW-NNW quadrant (NW 9.3%, WNW 10.2%, W 11.0%), which are cross-onshore at best. The good news: when a strong high sits south of the continent, easterly winds (E, ENE, NE) can provide clean, offshore conditions for a few hours each morning. During those windows, massive, charging 2.5m+ waves with long, powerful walls are the reward. The rest of the time, it's a battle with wind that makes waves unruly. Choose your timings carefully.
Average Spot conditions at Margaret River in July
Swell history for July
Wind history for July
Swell quality
Analyze the groundswell consistency at Margaret River during July. 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 Margaret River for your next trip in July.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Margaret River for July. 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 Margaret River.