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Conditions at The Island in September
September: Spring Shoulder With a Southern Punch
September begins the transition out of winter but doesn't give up the groundswell. Average height eases to 5-6ft (1.7m), average period remains a solid 10.5s, and S swell is still the star at 18.8% of the rose - with SSE (12.3%) and SSW (7.2%) adding plenty of directional variety for the beach. The optimal-direction total runs near 48%, and the wave-height distribution shows a healthy mix of 1-1.5m (3.3-5ft) and 1.5-2m (5-6.6ft) surf. The wind picture turns more favorable: NNW (14.6%), NW (13.7%) and WNW (13.2%) are the three most common wind directions, pushing the ideal wind score to 49% - the joint-best of the year. Water temps are a cold 13.9°C, air temp averages 11.1°C, and 2.62mm/day of rain keeps things crisp. September is a real sleeper month: winter swell with spring winds.
Average Spot conditions at The Island in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at The Island 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 The Island for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at The Island 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 The Island.