Conditions at Haleiwa in April
April: The Final Winter Flicker
April is the true transition month. Average swell heights fall to 7ft (2.2m) and periods drop to 10.3s, so the North Pacific is no longer delivering as many long-period monsters. The swell distribution flips toward the east, with ENE at 24.2%, NE at 17.5%, and E at 7.2%, while the optimal NNW window shrinks to 9.0% and NW to just 1.8%. This is trade-wind-orientated surf: cross-shore energy that tends to wall up rather than wrap consistently around Haleiwa's reefs.
When a late-season NNW or N swell does sneak through, the combined 4.7% N and 9.0% NNW can still produce a few standout days, especially because water temperature is 24.5°C and winds are generally lighter. However, ideal offshore flow is only 35%, with ENE winds blowing 47.3% of the time. Air temperatures are 23.5°C, rain drops to 1.39mm/day, and winter is basically one or two pulses away from done.
Average Spot conditions at Haleiwa in April
Swell history for April
Wind history for April
Swell quality
Analyze the groundswell consistency at Haleiwa 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 Haleiwa for your next trip in April.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Haleiwa 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 Haleiwa.