Conditions at Kugenuma in April
April: Spring South Swell vs. Onshore Drift
April is the first true spring month, and the wind shift is immediately visible. Swell directions are beautifully aligned with Kugenuma: SSE (20.0%), S (19.8%) and SSW (19.5%) dominate, with SE adding another 15.0%. The average height holds at 0.8m and the period sits at 8.0s. The problem is the wind. While NNE still contributes 16.1% and NE 11.2%, the onshore SSW (15.7%) and SW (11.9%) sectors have grown into a strong sea-breeze component. The result is a classic spring pattern: clean and glassy in the early morning, then increasingly lumpy and bumpy as the day warms. Only 17% of the time is ideal. Water temperature has climbed back to 16.2°C and air temperature averages 12.0°C, so spring suits are comfortable. If you catch an early outgoing tide with NNE offshore flow and one of those S/SSW groundswells, Kugenuma can still offer playful 2-3ft (0.6-0.9m) peaks, but you have to work around the daily wind cycle.
Average Spot conditions at Kugenuma in April
Swell history for April
Wind history for April
Swell quality
Analyze the groundswell consistency at Kugenuma 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 Kugenuma for your next trip in April.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Kugenuma 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 Kugenuma.