Conditions at Waimea in April
April: Trade Wind Transition
April is a definite transition month. Average swell height falls to 7.2ft (2.2m) and average period drops to 10.3s, so waves become less organized. The swell direction distribution flips dramatically: ENE leads with 24.2%, NE with 17.5%, NNE with 11.7% and E with 7.2%, while the optimal NW/NNW sources shrink to single digits. This is shorter-period, trade-driven energy rather than long-period North Pacific groundswell, though occasional NNW swells still show up at 9.0%. The winds are dominated by strong ENE (37.0%) and E (36.0%) trades, and ideal offshore wind only occurs 17% of the time, partly because the trades become more side-on. Air temps warm to 23.5°C, water temp is 24.2°C and precipitation eases to 1.39mm/day. Expect racetrack conditions and fun but less iconic Waimea surf.
Average Spot conditions at Waimea in April
Swell history for April
Wind history for April
Swell quality
Analyze the groundswell consistency at Waimea 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 Waimea for your next trip in April.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Waimea 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 Waimea.