Conditions at San Juan in October
October: The Autumn Sweet Spot
October is San Juan's other standout month. Ideal wind reaches 37%, and although the average size drops to 2-3ft (0.7m), the quality outlook is better than almost any other month. The swell is still ESE (50%) and E (32%), with SE (12%) in the mix, but the period is 5.9s and most waves are 2-3ft (0.5-1m). What October lacks in size it makes up for in frequency of clean, glassy sessions - the transition out of the wet season tends to bring lighter easterlies and more S/SW offshore pulses.
The wind distribution is the most favorable of the fall: E falls to 29%, ESE to 26%, SE to 13%, and the S/SE quadrant accounts for over 22%. With air at 27.4°C, water 29.1°C, and daily rain still on the high side at 5.29mm, it is warm and sticky, but the waves are more often lined up and user-friendly. A great month for small-wave surfing and getting the most out of a groveler.
Average Spot conditions at San Juan in October
Swell history for October
Wind history for October
Swell quality
Analyze the groundswell consistency at San Juan 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 San Juan for your next trip in October.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at San Juan 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 San Juan.