Conditions at Baltrum in September
September: Atlantic Whispers Grow into Roars
The first real swell of the autumn arrives, and Baltrum starts to wake up. The average swell height climbs firmly to 1.3m (4.3ft) and the period lengthens to 6.2s, bringing a distinct increase in power. The dominant swell directions are a healthy spread across the NW (13.0%), NNW (15.2%), and WNW (12.2%), with a strong W (11.2%) component. This is the month where an early-season Atlantic low can spin up a 2m (6.5ft) swell, and with the sea surface temperature still at a super comfortable 17.2°C, it is prime time. The wind patterns are favorable too: the ideal offshore frequency hits its peak for the year at 15%. The SW and SSW winds blow reliably, grooming the cross-shore conditions. Air temps average 15.0°C, with cool but pleasant nights. This is the month to keep your schedule flexible. The ocean is transitioning from summer mush to autumnal power, and the right combination of swell and wind yields some of the best, cleanest, and most fun sessions of the year - before the deep-freeze arrives.
Average Spot conditions at Baltrum in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Baltrum 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 Baltrum for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Baltrum 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 Baltrum.