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Conditions at Shoals Point in September
September: Autumn Instability and a Noticeable Swell Jump
September is when the North Atlantic starts waking up again. Average swell heights jump to around 6ft (1.9m), the period sits at 9.9s, and the shift toward bigger W/SW energy becomes clear. WSW and SW swells account for 54% combined, while true E through SSE swell is still only 2.6%. The wind setup becomes more complicated: ideal offshore W-NW flow drops to 31%, while onshore ESE/SE/SSE winds climb to around 34%, driven by the first strong autumn low pressure systems and lingering warm ocean temperatures. Early-season nor'easters and tropical remnants can deliver excellent E/SE swell, though often with messy onshore wind. Water temperature is still pleasant at 13.0°C, air temps average 11.4°C, and precipitation jumps sharply to 9.13 mm/day. September rewards surfers who are willing to chase the changeable autumn windows.
Average Spot conditions at Shoals Point in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Shoals Point 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 Shoals Point for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Shoals Point 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 Shoals Point.