Conditions at Haleiwa in July
July: The Deepest Summer Slump
July represents the low point of Haleiwa's annual cycle. Average swell height is 5.5ft (1.7m), but more importantly the period is down to 7.8s - a short-period, wind-driven spectrum that never gets the reef to stand up. ENE swell produces 64.5% of all wave energy, with E at 27.8% and NE at 4.9%. The N, WNW, NW, and NNW directions are effectively absent, totaling less than 1%. Haleiwa faces almost entirely away from the available swell.
The trade-wind regime is even more locked in: ENE wind blows 75.2% of the time and E another 16.9%, leaving most days with a bumpy cross-shore texture. Although the wind is considered ideal 40% of the time, those windows rarely coincide with any meaningful swell. Water temperature reaches 26.2°C, air temperature is 25.7°C, and rainfall is low at 1.04mm/day. This is the true summer flatline.
Average Spot conditions at Haleiwa in July
Swell history for July
Wind history for July
Swell quality
Analyze the groundswell consistency at Haleiwa 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 Haleiwa for your next trip in July.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Haleiwa 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 Haleiwa.