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Conditions at Flagler Avenue in September
September: The Hurricane Wildcard
September is where the season turns. Average swell height jumps back to 4ft (1.2m) and the period improves to 8.9s - the longest of the year. The wave rose shows a strong shift toward the optimal window: E is 32.6%, ENE 29.7%, NE 12.6%, and ESE 15.0%. This is classic Atlantic hurricane/storm-swell country: these direction sectors can deliver 5-7ft (1.5-2m) and even 6-8ft (2-2.5m) waves when a tropical cyclone tracks up the coast. The catch is the wind. Ideal wind is only 29 percent of the time in September. NE/ENE winds are frequent (10.9% and 14.9% respectively), and because those are onshore at Flagler Avenue, the surface can get messy. Still, when a hurricane or tropical storm sets up well off the coast, September can produce some of the best waves of the year. Air temp averages 27.5°C (82°F), water is a bathtub-like 28.4°C (83°F), and rainfall averages 5.61 mm/day.
Average Spot conditions at Flagler Avenue in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Flagler Avenue 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 Flagler Avenue for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Flagler Avenue 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 Flagler Avenue.