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Conditions at Manuel Antonio in September
September: The Swell Train Refuses to Die
September is often overlooked because the rainy season is at its peak, but the statistics show a gem. The average height stays at 4.6ft (1.4m), the period remains 13.1s, and the ideal-wind percentage jumps back up to 24%-the best of any month since April. The swell distribution broadens nicely: SSW still leads at 70.6%, but SW contributes 27.9% and WSW adds another 1.3%. This mixture produces excellent peak variety on the SSW-facing sandbars, with plenty of 3-5ft (1-1.5m) waves and nearly 30% pushing into the 5-6.5ft (1.5-2m) range and bigger. Rainfall is at its annual max (8.68mm/day), so expect lush scenery and warm 28.7°C water, but also plan your sessions around the tides and early-morning wind.
Average Spot conditions at Manuel Antonio in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Manuel Antonio 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 Manuel Antonio for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Manuel Antonio 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 Manuel Antonio.