Conditions at San Juan in April
April: Lighter Trades, Longer Chances
April is where the percentages finally start to favor the surfer. The average swell remains 2-3ft (0.8m) at 6.0s, but the story is the wind: 30% ideal/offshore conditions, the highest so far in the year. The swell rose remains stubbornly east - ESE is 48%, E is 35%, and SE adds another 11% - so size and period are still limited. But with weaker E/ENE trades (E down to 31%, ENE to 16%) and more SE/SSE flow, the surface texture is cleaner and the east swells wrap through with more consistency.
Water temperatures are on the rise at 26.7°C and air temps reach 26.1°C. Rain increases to 2.94mm/day, but April is still not too wet. For a location where 2-3ft is the default, this is a great month for grovelers, twin fins and longboards. It is not big, but it is more often clean.
Average Spot conditions at San Juan in April
Swell history for April
Wind history for April
Swell quality
Analyze the groundswell consistency at San Juan during April. 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 April.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at San Juan for April. 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.