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Conditions at The Dunes in August
August: Winter Holding Pattern
August continues the winter theme with an average swell height of 2.8m (9.2ft) and a long 12.4s period. SW still leads the direction list at 17.5 percent, with WSW at 9.0 percent and SSW at 9.8 percent. The favorable WSW/W/WNW/NW window remains broad enough to keep the beach producing quality waves, and the persisting Southern Ocean storm track means the lulls between swells are short.
The wind is slightly less consistent than June and July, with ideal conditions dropping to 20 percent. SE winds are at 14.9 percent and SSE at 13.8 percent, while NNW winds ease to 15.9 percent. NW winds also remain around 10 percent, so there are still clean windows but they require more vigilance. Water temp is the coldest of the year at 15.0C, and air temps stay low near 14.3C. August is a solid, dependable winter surf month with plenty of heavy groundswell to go around.
Average Spot conditions at The Dunes in August
Swell history for August
Wind history for August
Swell quality
Analyze the groundswell consistency at The Dunes 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 The Dunes for your next trip in August.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at The Dunes 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 The Dunes.