Conditions at Hanstholm in September
September: Autumn Awakens
September is when Hanstholm starts to wake from its summer slumber. Average swell height climbs back to around 4-5ft (1.2-1.5m) at 1.4m, the period lengthens to 6.3s, and the first genuine Atlantic lows of autumn begin to send longer-period energy toward the North Sea. The swell rose is still dominated by WNW, W and WSW, but the distribution becomes more spread out as the season deepens. N/NNE/NW/NNW swell directions account for only about 8% of the total, so it remains a spot where you need a favorable storm track to bring the best angles. Wind patterns are also in transition: WNW and W winds still lead, but easterly and southerly components become more common, and the ideal offshore wind window sits at 10%. Water temperature is still comfortable at 15.9°C, while air temperatures cool to 14.2°C. This is one of the best months for solid surf at the summer-autumn boundary, especially when a low-pressure system parks west of Denmark and a high-pressure ridge delivers southeast winds.
Average Spot conditions at Hanstholm in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Hanstholm 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 Hanstholm for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Hanstholm 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 Hanstholm.