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Conditions at Playa Jaco in September
September: The Wettest, Windiest Battle for Clean Surf
September is deep in the Central American wet season, and the wind distribution becomes increasingly westerly. While the average swell remains a solid 1.4m at 13.0s, the swell window shifts slightly, with the SSW share at 84% and the SW component growing to 15%. Onshore and cross-onshore westerly flow - WSW, W and WNW - accounts for a huge portion of the wind rose, and ideal offshore wind is just 19%. Rain is heavy at 8.68 mm/day, air temperatures are stable near 26°C (23-30°C), and water temperature cools a touch to 28.8°C. The surf is often head-high and powerful, but tropical downpours and lumpy texture mean the quality is unpredictable. Look for a passing land breeze to unlock the best of the September swells.
Average Spot conditions at Playa Jaco in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Playa Jaco 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 Playa Jaco for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Playa Jaco 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 Playa Jaco.