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Conditions at San Blas in May
May: The First Big Push of the Green Season
The South Pacific roars back to life in May. Average swell height jumps to 4.5ft (1.4m), the period hits its annual max at 14.2s, and the SSW direction is unstoppable at 87.5%. The height distribution is juicy too: 60.8% from SSW at 3-5ft (1-1.5m), 20.3% at 5-6.5ft (1.5-2m), and 1.9% overhead at 6.5-8ft (2-2.5m). S and SW fill out the corners, making this the most powerful swell month of the year so far.
The trade-off is the wind. The ITCZ is starting to creep north, and ideal surf wind drops to 42%. Onshore S/SSW flow is 16.4% of the wind distribution, and the offshore quadrant is just 21.4%. What saves the quality is the light nature of the winds - most are in the 0-10kph category, so the surface tension can stay low before the afternoon sea breeze. Rain becomes a factor at 5.26mm/day, and water temps reach 30.2°C. Look for early-morning windows, outgoing tides, and any passing storm outflow that flips the wind offshore.
Average Spot conditions at San Blas in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at San Blas during May. 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 Blas for your next trip in May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at San Blas for May. 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 Blas.