Conditions at Espinho in September
September: Autumn Stirrings Begin
September is the first month where Espinho starts to feel like a surf spot again. The average swell height lifts to 3.6ft (1.1m), and the average period lengthens to 10.4s, as early-autumn Atlantic lows begin to organize farther north and send more organized groundswell toward Portugal. The swell direction is still mostly northwesterly, with WNW 42.0%, NW 39.3%, and W 11.5%, but there is more energy in the 3-5ft (1-1.5m) and 5-6.5ft (1.5-2m) bands than in July or August. The first genuinely powerful pulses can arrive in the third or fourth week of September.
Wind quality also improves, with ideal conditions at 27%. The summer northerly is still present, with NNW 31.1% and NW 10.0%, but it is weaker and less persistent than at midsummer, and easterly/offshore flows become more common as high pressure shifts. Water temperature is still warm at 17.1°C, air temperatures average 19.2°C, and rain increases slightly to 1.92 mm/day. September is a transition month: still inconsistent, but the potential for memorable, clean, late-summer surf is growing with each passing low.
Average Spot conditions at Espinho in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Espinho 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 Espinho for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Espinho 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 Espinho.