Conditions at Porzcarn in September
September: The Atlantic Stirs
September is a turning point. The average swell height climbs back to 4ft (1.2m), the period lengthens to 9.9s, and ideal wind conditions reach 20%, tied for the highest of the year. W (29.8%), WNW (27.7%) and WSW (13.4%) continue to supply the bulk of the energy, but now a higher percentage of that swell sits in the 3-6ft (1-2m) range, so Porzcarn starts to produce clean, rippable head-high waves on a more regular basis. The winds are still a mix: onshore W-NW flow is common, but the offshore ENE-E-SE quadrant also shows up with enough frequency to give real windows. Water temp remains warm at 17.0°C, air temps average 16.1°C, and precipitation is still modest at 1.97 mm/day. Watch for the first cold fronts of the season; they will be the signal that winter is on its way.
Average Spot conditions at Porzcarn in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Porzcarn 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 Porzcarn for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Porzcarn 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 Porzcarn.