Conditions at Cova da Alfarroba in September
September: The Atlantic Stirs - Autumn's First Real Swell
September is the turning point. The North Atlantic begins to generate more organized frontal systems, and the average swell height rises to 6ft (1.7m) with a solid 10.5-second period. Direction remains favorable, with NW (34%) and NNW (33%) splitting the rose almost evenly, plus WNW (16%) in support. The wind still leans northerly - NNW (40%), N (11%), NW (8%) - but the return of stronger extratropical storms brings more frequent southwesterly wind shifts. Ideal S/SSW/SW conditions improve to 19%. Water temperature is still warm at 18.7°C, air at 19.3°C, and rainfall increases slightly to 1.08mm/day. September is a great transitional month: small days still exist, but the long-period pulses are starting to roll in and the quality is on the rise.
Average Spot conditions at Cova da Alfarroba in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Cova da Alfarroba 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 Cova da Alfarroba for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Cova da Alfarroba 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 Cova da Alfarroba.