Conditions at Quepos in September
September: Biggest Swells, Wettest Month
September continues the high-swell trend with an average height of 1.4m (4.5ft) and a period of 13.1s. The swell mix is interesting, with SSW dropping to 70.6% and SW increasing to 27.9% - more west in the angle means a slightly more exposed push into Quepos' SW-facing shore. Roughly 28% of waves are 1.5m (5ft) or bigger, and the power is serious.
The trade-off is the weather. September is one of the rainiest months (8.68mm/day) and the wind is mostly onshore, with ideal windows only 23% of the time. The tropical atmosphere is also busy, with potential tropical cyclones in the Eastern Pacific capable of spinning up unexpected large swells. Water temp drops slightly to 28.7°C, but the air remains warm and muggy at 25.5°C.
Average Spot conditions at Quepos in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Quepos 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 Quepos for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Quepos 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 Quepos.