Conditions at Cotton Trees in July
July: Heavy but Messy
July delivers serious South Atlantic groundswell: average height 4-5ft (1.4m), period 11.8s. S swell is still the foundation at 57.4%, with 15.4% in the 5-6.5ft (1.5-2m) class; SSW contributes 41.9%, highlighted by 13.8% at 5-6.5ft and 1.2% at 6.5-8ft (2-2.5m). This is some of the biggest surf Cotton Trees sees all year. Yet the monsoon is now in full force: ideal wind drops to 10%, and SSW (30.0%), S (20.6%) and SW (21.3%) winds are common, often in the 20-30kph range. That combination creates powerful but lumpy, onshore waves. When a brief offshore burst arrives, expect heavy, grinding walls rather than user-friendly rollers. Water temperature is 27.0°C, air temp 25.7°C, rainfall 6.85mm/day.
Average Spot conditions at Cotton Trees in July
Swell history for July
Wind history for July
Swell quality
Analyze the groundswell consistency at Cotton Trees during July. 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 July.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Cotton Trees for July. 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.