Conditions at Calais in September
September: The Season Turns
September marks the slow awakening of autumn. Wave height ticks back up to about 2.6ft (0.8m), and the period increases slightly to 4.9s. The wave rose is still split between NNE at 14.4% and WSW at 14.8%, while NNW and NW contributions begin to rebuild the north swell window. Winds are still dominated by SW/WSW, but the offshore wind share improves to 6%. With water still warm at 17.8°C and air at 15.8°C, September offers one of the best compromises of the shoulder season: fun-sized waves, relatively warm water, and the first real autumn storm pulses beginning to show.
Average Spot conditions at Calais in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Calais 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 Calais for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Calais 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 Calais.