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Conditions at Hermosa Beach in September
September: Fall Begins to Stir, But Summer Still Rules
September is a transitional month. The swell rose still favors summer directions, with WSW 38.8%, SW 35.9%, SSW 13.0% and W 11.1%. Average period is a healthy 12.6s, but average height is only 0.8m and about 7% of readings are above 1m (3.3ft). Ideal offshore wind sits at just 14%, while W (31.0%) and WSW (20.0%) winds dominate the daily breeze. Water reaches its warmest point of the year at 17.8°C and air averages 22.9°C. Late-month W groundswell can start to appear as the Pacific storm track wakes up, but consistency remains low.
Average Spot conditions at Hermosa Beach in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Hermosa Beach during September. 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 Hermosa Beach for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Hermosa Beach for September. 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 Hermosa Beach.