Conditions at Andora in September
September: The First Rumbles of Autumn
September marks the beginning of the slow march back toward swell season. The averages are still tiny - around 1-2ft (0.4m) at 4.5 seconds - but the shaking-off of summer is visible in the data. SSW swell still leads at 27.5 percent, SW at 15.8, and S at 10.1, while the NE sector contributes around 18 percent of readings, reflecting the first stronger northwest Mediterranean pressure gradients. Wind behavior improves slightly: NNW jumps back up to 19.7 percent, and the offshore quadrant total is the highest since spring. Still, only 8 percent of hours hit our ideal threshold. The sea remains warm at 22.4°C, air at 19.3°C, and rainfall climbs to 2.43mm per day as autumn lows become more frequent. Surf quality remains marginal, but the last week of September can start producing 2-3ft (0.6-1m) SSW pulses under a morning NNW offshore wind, hinting at what winter will bring.
Average Spot conditions at Andora in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Andora 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 Andora for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Andora 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 Andora.