Conditions at Sendai in May
May: Small Summer South-Swell and Mussy Wind
The summer pattern sets in during May. The average height eases to 3ft (1.0m), the period drops to 8.3s, and ideal wind sits at just 39%. SE swell dominates hard - SE (33.3%), ESE (24.5%), SSE (19.4%) and E (13.5%) - but the lower periods rob those swells of power. Onshore flow from the ESE/SE/SSE sectors increases, and the wind tables show a strong thermal sea-breeze component. Early clean dawn patrols can produce fun, grovelly 2-3ft waves, but by afternoon it's often blown out and lumpy. Water temp warms to 13.7°C and air averages 14.6°C, making the transition pleasant, even when the surf isn't.
Average Spot conditions at Sendai in May
Swell history for May
Wind history for May
Swell quality
Analyze the groundswell consistency at Sendai during May. 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 May.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Sendai for May. 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.