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Conditions at Port Mary in September
September: Autumn's First Spark
September is the month when Port Mary starts to wake up. The average swell rises to 6.6ft (2.0m), though the period is still only 9.9s. The directional window remains dominated by WSW/SW, with SSW adding plenty of energy, and the height distribution becomes more evenly spread into the 5-8ft (1.5-2.5m) pumping bracket. The developing autumn storm track sends early-season gales across the North Atlantic, and with the right timing the surf can be surprisingly strong. Still, ideal wind is only 26 percent and onshore SSE/S winds are frequent, so sessions can be a puzzle. Air temperature cools to 11.4°C, water sits at 13.0°C, and precipitation jumps to 9.13mm/day. September is a transition month, but it has genuine bite at Port Mary.
Average Spot conditions at Port Mary in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Port Mary 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 Port Mary for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Port Mary 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 Port Mary.