Conditions at La Selva in September
September: The Turn
September is the start of the autumn transition. The average swell height remains modest at around 4ft (1.2m), but the wave period jumps to 8.1s and the swell direction shifts back toward the north-eastern quadrant. ENE still leads at 42%, yet NE jumps to 25% and NNE adds another 8%, bringing the optimal N/NNE/NE/NNW share to around 36%. When a tropical system or an early-season cold front aligns, La Selva can suddenly light up with clean, powerful surf.
Wind conditions become more favourable too, with ideal offshore readings occurring 44% of the time. The trade winds are a bit lighter, and S/SSW/SW flow is more frequent into the autumn. Water temperature is a warm 29.2°C and heavy tropical showers are common with precipitation at 6.49mm per day. For the patient surfer, September is the month to start watching the forecast again.
Average Spot conditions at La Selva in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at La Selva 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 La Selva for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at La Selva 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 La Selva.