Conditions at Coxos in September
September: Autumn Stirs in the Deep Atlantic
September is the first sign that winter is waking up. Average swell climbs back to around 5.2ft (1.6m), the average period stretches to 10.5 seconds, and the ideal-wind percentage doubles to 16 percent. The direction mix remains northern, with NW at 36.0 percent, NNW at 34.4 percent and WNW at 15.4 percent, but the increase in period gives the swell more push, and occasional early-season lows send their first true W/SW pulses toward Iberia. The wind is still tricky, with NNW at 36.0 percent and N at 15.6 percent, but the NE/ENE/E offshore windows become more regular. This is a golden transition month: water is still warm at 18.2°C, air averages 19.8°C, and rain begins to return at 0.95 mm/day. If September offers a WNW swell with an east wind, Coxos can absolutely fire.
Average Spot conditions at Coxos in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Coxos 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 Coxos for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Coxos 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 Coxos.