Conditions at San Juan in June
June: Summer Begins: Trade-Wind Slop
June keeps the good wind percentage relatively high at 35%, but the swell direction locks into the summer pattern. A remarkable 75% of all waves arrive from the ESE, with E (15%) and SE (9%) filling the rest. Most is 2-3ft (0.5-1m), although 19% reaches the 3-5ft (1-1.5m) class. The 6.0s period and the absence of any NE/NNW energy mean San Juan is reliant on average-period trade-wind swell that hits the beach at a poor angle.
Wind wise, E and ESE combine for a dominating 82%, and while speeds remain mostly light-to-moderate, the cross-shore direction keeps surfaces lumpy for a lot of the month. When the wind does shift from S/SW, the 28.2°C water and 27.4°C air make for pleasant, small summer surf. Rain increases to 3.28mm/day as convective showers start to build in the afternoon.
Average Spot conditions at San Juan in June
Swell history for June
Wind history for June
Swell quality
Analyze the groundswell consistency at San Juan during June. 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 June.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at San Juan for June. 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.