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Conditions at Honolua Bay in April
April: The Trade-Wind Takeover Begins
April marks a clear transition. Average swell height eases to 1.7m (about 5-6ft) and the period shortens to 10.6s. The swell direction rose flips to east-northeast, with ENE at 31.5%, NE at 25.0%, and NNE at 16.6%, while NNW drops to 8.7% and N to 6.1%. The total energy arriving from the ideal north-northwest window falls to roughly 15%, so Honolua starts to feel more shadowed from the dominant trade-wind swells.
Wind conditions become heavily trade-dominated: ENE wind accounts for 60.7% and NE for another 17.7%. Ideal southwest wind is rare, around 3%, and the ideal wind index falls to 20%. The combination of shorter-period east swell and strong cross-shore/onshore trades makes for less consistent and less polished surf. Still, leftover winter north swells can sneak in after a late-season front. Air temperature averages 23.7°C, water temperature is 24.3°C, and precipitation drops to 1.46 mm/day.
Average Spot conditions at Honolua Bay in April
Swell history for April
Wind history for April
Swell quality
Analyze the groundswell consistency at Honolua Bay 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 Honolua Bay for your next trip in April.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Honolua Bay 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 Honolua Bay.