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Conditions at Black Rock in October
October: Cleaner Winds but the Westerly Swell Train Fades
October is a month of increasing offshore winds and decreasing westerly swell. Average swell height holds at 5ft (1.6m), period is 8.6s, and the SSW-W quadrant accounts for only around 4.2 percent of total wave energy. The dominant directions are SSE (17.3 percent), S (13.3 percent), NE (12.7 percent) and ENE (12.0 percent). This means Black Rock sees more cross-shore and side-shore energy rather than true southwest groundswell. The trade-off is wind quality: NNE blows 13.5 percent of the time, NE 9.8 percent, and the ideal-wind score reaches 28 percent. Water temperature rises to 18.2°C, and air temperatures average 16.8°C. Expect cleaner, more user-friendly days with fun 3-5ft (0.9-1.5m) waves, though rarely with the size and power that winter can produce.
Average Spot conditions at Black Rock in October
Swell history for October
Wind history for October
Swell quality
Analyze the groundswell consistency at Black Rock during October. 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 October.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Black Rock for October. 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.