Conditions at Belmar in September
September: Prime Shoulder - Tropics Meet Autumn
September is Belmar's sleeper month. Average height is still a modest 3.5ft (1.1m), but the average period jumps to 8.3s - the highest of the entire year by a clear margin. Even better, the swell direction is perfectly aligned: the favorable ENE/E/ESE/SE quadrant accounts for 61% of all wave energy, with ESE (20%), SE (19%), and E (16%) doing the heavy lifting. This is the heart of Atlantic hurricane season, and these long-period tropical swells from the southeast can turn Belmar on when a storm tracks offshore or develops near Bermuda. Offshore winds are favorable 39% of the time, and water temp remains warm at 21.6°C with air temp at 20.6°C. September offers the rare combination of warm water, clean easterly swell, and punchy 8-9s periods - do not sleep on it.
Average Spot conditions at Belmar in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Belmar 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 Belmar for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Belmar 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 Belmar.