Conditions at Praia da Rocha in August
August: Smallest Swell of the Year, but Hints of Autumn
August produces the smallest average swell of the calendar year at 2.3ft (0.7m), with the average period still sitting below the 9s mark at 8.6s. The northwesterly swell machine continues to dominate - NW (59%) and WNW (24%) - and the S-SSW-SW-WSW window is only about 1%, meaning the bay is almost entirely dependent on NW swell wrapping and bending into the exposure. The good news is that ideal offshore wind creeps back up to 30%, and water temperature peaks at 19.6°C with air at 21.8°C. Rain remains scarce at 0.10mm/day. While the consistency is high, the size is low; small, clean, rippable waves are possible on a longboard, but you'll still be waiting for September.
Average Spot conditions at Praia da Rocha in August
Swell history for August
Wind history for August
Swell quality
Analyze the groundswell consistency at Praia da Rocha during August. 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 da Rocha for your next trip in August.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Praia da Rocha for August. 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 da Rocha.