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Conditions at Perranporth in September
September: The Atlantic Stirs Back to Life
September is when Perranporth starts waking up from its summer slumber. The average swell increases to 4ft (1.3m) and the average period stretches to 9.6s, a sign that autumn weather systems are beginning to organize across the North Atlantic. The swell direction distribution is excellent - W 40.2%, WNW 19.0%, WSW 13.0% - and there is a bit more 1.5-2m (5-6ft) energy scattered through the mix. Offshore wind increases to about 21%, helped by a more mobile jet stream and the first real low-pressure systems of the season. Water remains warm at 16.4°C and air temps average 15.3°C, making it one of the best combinations of building swell and comfortable wearing conditions. Early autumn swell events can already produce punchy, clean surf at Perranporth before the winter storm train fully fires, and the lower crowd levels are a bonus.
Average Spot conditions at Perranporth in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Perranporth 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 Perranporth for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Perranporth 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 Perranporth.