Conditions at Sendai in April
April: Spring Thaw and Onshore Headwinds
April is where consistency starts to fade. Wave heights remain at 3.5ft (1.1m), but the period drops to 8.9s and ideal wind falls to 41%. The swell is now overwhelmingly E/ESE/SE/SSE, with SE (24.8%), ESE (22.3%), E (16.1%) and SSE (16.8%) dominating the matrix. This is the first month where onshore S/SE winds become a real problem, turning much of the ESE/SE groundswell into lumpy, wind-blown waves. Morning westerly breezes or post-frontal NW winds are the only reliable windows. Water temp is on the rise at 10.6°C, and April showers bring 3.25mm/day of rain. It is surfable, but you have to pick the day.
Average Spot conditions at Sendai in April
Swell history for April
Wind history for April
Swell quality
Analyze the groundswell consistency at Sendai 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 Sendai for your next trip in April.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Sendai 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 Sendai.