Conditions at Bico in September
September: First Swell, Still Summer Wind
September is the recharge month at Bico. The average swell height remains modest at 1.1m (3-4ft), but the period climbs back to 10.5s, hinting at the returning groundswell energy from the North Atlantic. NW (50%) and WNW (32%) still control the swell window, and the occasional early-season low can produce a fun, clean 4-6ft (1.2-1.8m) day.
Wind is still trending summery - NNW at 37% - but ideal offshore conditions improve to 15%. The ocean water is at its warmest, around 18.2°C, and air temps average 19.9°C. Rain remains scarce at 0.89 mm/day. As the Azores High starts to lose its grip, the first cold fronts sniff around the Iberian coast, bringing hope of more consistent surf in the months ahead.
Average Spot conditions at Bico in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Bico 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 Bico for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Bico 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 Bico.