Conditions at Hornbaek in September
September: The Autumn Stirrings
September is the first month that feels like a turn back toward surfable conditions. Average height rises to around 1.5ft (0.5m), period to 3.8s, and ideal wind remains at 4%. The wave rose still leads with W 11.6%, WNW 11.3%, WSW 10.6%, SW 9.7%, but there are increasing signs of NNW 7.1% and NW 6.0% as early autumn lows stray into the North Sea. The return of the North Atlantic storm track begins this month, though wave periods are still short. Winds are mostly WSW/W/SW, so cross-shore wind remains a problem, but the cooler air at 14.0°C and dropping water temp of 16.0°C reduce the sea-breeze influence. September can deliver the first clean 2ft (0.6m) autumn days and, with a favourable pressure pattern, some early N/NW pulses in glassy S/SSW winds.
Average Spot conditions at Hornbaek in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Hornbaek 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 Hornbaek for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Hornbaek 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 Hornbaek.