Conditions at Santa Catarina in September
September: The First Taste of Autumn
September is the classic shoulder month. The North Atlantic wakes up again: average swell height climbs back to 6ft (1.9m) and period to 10.4s, so there is more push and length in the water. The wave rose is still NNW-heavy at 22.8%, with NW at 16.7%, WNW at 8.4%, NNE at 8.8% and NE at 6.6% filling out the compass. The percentage of surfable, offshore wind days is still generous at 20%, with WSW at 7.4%, SW at 8.3%, W at 6.9% and SSW at 6.8% all blowing offshore. As the days shorten and the first autumnal lows develop, Santa Catarina often receives clean 6-8ft (1.8-2.4m) groundswell. Water temperature remains warm at 22.7°C (73°F), air averages 22.0°C (72°F), and rainfall increases to 1.86mm/day, making September an excellent window before the winter crowds and cold fronts arrive.
Average Spot conditions at Santa Catarina in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Santa Catarina 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 Santa Catarina for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Santa Catarina 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 Santa Catarina.