Conditions at Andran in September
September: The Autumn Switch Flickers
September is where Andran starts to wake up. The average swell rises to 1.2m (4ft) and the period lengthens to 10.3s, signalling the first proper long-period pulses from a re-energised North Atlantic. NW still dominates the swell window at 48%, with NNW at 29% and WNW at 6%; importantly, the 1-1.5m (3-5ft) and 1.5-2m (5-6ft) ranges gain more presence, and a few bigger NW swells begin to show up.
The wind remains the limiting factor. Ideal conditions occur only 20% of the time, as E/ENE flows continue to dominate and onshore N/NNW/NW/WNW wind can still be obnoxious. Still, the temperature gradient across the Atlantic is rebuilding, and each passing low brings a better chance of clean S/SW offshore flow. Water temperature is still warm at 19.9°C, air averages 18.5°C, and rainfall starts to creep back up at 1.88mm/day.
Average Spot conditions at Andran in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Andran 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 Andran for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Andran 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 Andran.