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Conditions at Black Rock in August
August: Winter's Last Push With Better Windows
August continues the winter theme but with slightly more forgiving conditions. Average swell height remains around 5ft (1.6m), average period is a solid 9.0s, and the SSW-W swell quadrant still delivers about 16 percent of total energy, keeping the southwest-facing beach in the game. S swell leads the direction breakdown at 16 percent, with SSE close behind at 14.8 percent. The wind outlook improves: the ideal-wind score rises to 22 percent, and while W (15.3 percent) and WNW (13.8 percent) still dominate, there are more periods of high pressure and lighter flow. Water temperature reaches its coolest at 16.9°C, and air temperatures average just 12.4°C. Look for the post-front mornings with NE offshore winds; those are the windows when 6-8ft (1.8-2.4m) swells line up with real quality.
Average Spot conditions at Black Rock in August
Swell history for August
Wind history for August
Swell quality
Analyze the groundswell consistency at Black Rock 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 Black Rock for your next trip in August.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Black Rock 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 Black Rock.