Conditions at Porto Batel in September
September: Autumn's First Call
September is when Porto Batel starts waking up again. Average swell height climbs to 6ft (1.7m) and the period lengthens to 10.5s, moving back into the powerful long-period category. The swell distribution is still led by NW at 33.5% and NNW at 33.1%, with WNW at 15.5% and W at 4.1%, but the energy is increasingly from true Atlantic lows rather than summer breeze. Ideal wind jumps to 40%, and the wind regime begins to transition: NNW drops to 40.4%, while N increases to 11.2%, offering more varied offshore windows. Water temperature remains warm at 18.7°C, with air temperatures averaging 19.3°C. September is a beautiful transition month - you can score long-period groundswell in warm water, often with clean morning conditions and a fading summer sea breeze.
Average Spot conditions at Porto Batel in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Porto Batel 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 Porto Batel for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Porto Batel 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 Porto Batel.