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Conditions at Esterillos in October
October: Peak Rain, Mixed Wind, Still Plenty of SW Swell
October is the wettest month of the year in this part of Costa Rica, and while the swell machine keeps producing, conditions at Esterillos demand a picky approach. Average swell height stays at 4.5-5ft (1.4m), period drops to 12.7s, and the SSW direction still provides 78.4% of the waves. However, the SW component expands to 20.1%, with a meaningful 6.3% in the 5-6.5ft (1.5-2m) range and a sliver of 6.5-8ft (2-2.5m) energy. This broadening of the window means more west in the swell, which works well on a south-facing beach.
Ideal surf wind falls to 28%. The wind rose is split between W/WSW/WNW (each around 11%) and SSE/SE/SW (around 10%), meaning you can get either sloppy onshore conditions or, when WNW/NW flow lines up, surprisingly clean and powerful surf. Rain is intense at 9.36mm/day, and the added freshwater runoff can color the water at river mouths, so focus on the main beach peaks. Air temps cool to 25.2°C, and water temp drops to 28.0°C.
Average Spot conditions at Esterillos in October
Swell history for October
Wind history for October
Swell quality
Analyze the groundswell consistency at Esterillos during October. 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 Esterillos for your next trip in October.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Esterillos for October. 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 Esterillos.