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Conditions at Black Rock in January
January: Summer Trade Swells and Clean but Average Waves
January is locked into a summer pattern at Black Rock. The average swell height checks in around 5ft (1.6m), but the period is a modest 8.3s, meaning most waves are wind-swell hybrids rather than true groundswell. Roughly 95 percent of the energy arrives from the NE through SSE quadrant, with ENE, E and NE each contributing 15-17 percent, while the prized SSW-W directions total less than one percent - essentially a non-factor. On the bright side, the subtropical ridge drives a solid NNE/NE flow offshore, and the ideal-wind score reaches 30 percent. Air temperatures hover near 22.3°C, water temperature sits at 22.0°C, and precipitation averages 2.79 mm/day. It is an inviting month, but you are usually surfing 3-5ft (0.9-1.5m) peaks on a southwest beach without the westerly groundswell it truly loves.
Average Spot conditions at Black Rock in January
Swell history for January
Wind history for January
Swell quality
Analyze the groundswell consistency at Black Rock during January. 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 January.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Black Rock for January. 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.