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Conditions at Caswell Beach in September
September: Autumn's First Whispers
September is when the Atlantic starts to reawaken. Average wave heights pull back up to 3ft (0.9m) and the average period rises to 8.1s, a sign that storm systems are beginning to generate more organised groundswell. The directional mix remains WSW/W-heavy at around 61%, but the favourable SSE-S-SW sector reaches about 13%, and with water still at 16.7°C and air at 14.7°C, it is one of the most comfortable months for surfing. Precipitation is a moderate 2.75mm/day, and ideal offshore winds are still low at 12%, so you have to pick your days. When an early autumn low tracks the right way, Caswell can light up with clean, punchy, 3ft-plus waves before the winter cold arrives.
Average Spot conditions at Caswell Beach in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Caswell 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 Caswell Beach for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Caswell 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 Caswell Beach.