Conditions at Sylt in September
September: Autumn's First Stirrings
September is when the North Sea begins to wake up. Average swell height jumps back to 4.3ft (1.3m) and the period improves to 6.0 seconds, nudging the surf out of the choppy category and into the average, punchy zone. The swell direction map is classic for Sylt: NW (15.4%), W (12.0%), WNW (11.7%) and WSW (10.0%) combine for roughly half of all readings, and there is more genuine 3-5ft (1-1.5m) and 5-6.5ft (1.5-2m) energy in the water than at any time since spring. Wind conditions are not perfect but markedly better than summer: the ideal offshore ENE-E-SE quadrant totals 22.3%, while onshore westerly winds remain around 36%. The first autumn storms can produce peaky, lined-up sandbar waves, especially when high pressure to the east creates offshore flow ahead of an approaching low. Water temp is still pleasant at 16.8°C, air temps average 15.4°C, and precipitation rises to 2.81 mm/day. This is a transition month with real upside for early-bird surfers.
Average Spot conditions at Sylt in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Sylt 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 Sylt for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Sylt 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 Sylt.