Conditions at Praia Grande in September
September: The Atlantic Wakes Up
September is the turning point of the surf year. The average wave height rises to 5.5ft (1.7m) and the period to 10.5 seconds, signalling a return to more structured groundswell. The ideal directions remain in force: NW carries 36.0 percent, NNW 34.4 percent, WNW 15.4 percent, and W 4.4 percent. The distribution is still a little dominated by northern windswell, but the period increase and late-month storm tracks allow more powerful WNW/NW swell to arrive. Wind quality improves from the summer low: ideal offshore flow returns to 11 percent. NNW wind still leads at 42.2 percent, with N at 11.5 percent and NW at 9.2 percent, but there are more E/ESE/SE episodes as high pressure builds over Europe. Air temperatures remain warm at 19.8°C (min 12.2°C, max 32.1°C), precipitation is 0.95 mm/day, and water temperature peaks at 18.6°C. The first real swells of the new season are often rideable, lined up and clean.
Average Spot conditions at Praia Grande in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Praia Grande 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 Praia Grande for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Praia Grande 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 Praia Grande.