Conditions at Sao Lourenco in September
September: The First Autumn Signals
September is the turning point. Average swell height rises to 1.6m (5.2ft) and, more importantly, the average period lengthens to 10.5s - a sign that true groundswell is returning to the North Atlantic. The swell direction remains predominantly NW (36.0 percent) and NNW (34.4 percent), with WNW at 15.4 percent, but the energy is gradually becoming more organized.
Wind is still summer-like: NNW blows 36.0 percent of the time and N/NW sectors remain prominent. Ideal offshore wind climbs to 12 percent, offering increasing windows of clean, fun-sized surf in the 1.5-2m (5-6.6ft) range. Water temperature hits 18.2°C, the warmest of the year.
Average Spot conditions at Sao Lourenco in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Sao Lourenco 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 Sao Lourenco for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Sao Lourenco 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 Sao Lourenco.