Conditions at Cotton Trees in September
September: Transitional Power
September begins the slow transition away from the peak of the wet season. Average swell remains a solid 4ft (1.3m) with an 11.5s period, and the S/SSW split is nearly even: S at 49.6% and SSW at 49.2%. Both directions contribute good 3-5ft (1-1.5m) surf, with SSW also producing 9.3% of readings in the 5-6.5ft (1.5-2m) range and a small slice of 6.5-8ft (2-2.5m). Ideal wind recovers slightly to 12%, but onshore SW (22.6%), WSW (17.5%) and SSW (18.1%) flow is still frequent. The large South Atlantic swell is there, but you have to be selective. Water temperature is 26.9°C, air temp 25.7°C, and rain remains significant at 8.86mm/day.
Average Spot conditions at Cotton Trees in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Cotton Trees 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 Cotton Trees for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Cotton Trees 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 Cotton Trees.