Conditions at San Juan in July
July: The Dog Days of Summer
July is the low point of the summer season. The average size nudges back up to 3ft (0.9m), but the period stays at 6.0s, and almost all of that energy arrives from E (45%) and ESE (54%) - essentially 99% of the swell is from the east. This is pure trade-wind windswell, pulsing at short intervals and clipping the NNE-facing coastline on the shoulder. There is almost no N or NE groundswell to be found.
Wind quality takes a dive: ideal conditions only 18% of the time. The trades are strongest of the year, with E (55%) and ENE (15%) pumping in the 10-30kph range, creating bumpy, cross-shore surface conditions and a steady current. Air temps hit 27.7°C, water 28.4°C, and rain 3.68mm/day. This is not a month for epic surfing; it is a month for quick summer sessions on a soft-top or beach cruiser.
Average Spot conditions at San Juan in July
Swell history for July
Wind history for July
Swell quality
Analyze the groundswell consistency at San Juan during July. 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 July.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at San Juan for July. 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.