Conditions at Sendai in August
August: Peak Heat, Peak Typhoon, Peak Frustration
August is statistically the worst month for ideal wind, with only 27% of the time falling into the clean category. The average swell height is 3ft (1.0m), but the period of 9.1s flatters what is mostly typhoon-swell and SE windswell. SE (33.3%) and ESE (32.4%) dominate again, along with E (15.2%) and SSE (14.0%). The water reaches the warmest mark of the year at 23.4°C, and air temperatures average 24.2°C. Tropical storms and typhoons can fire 5-6ft (1.5-1.8m) of SE swell into the coast, but almost always with strong onshore ESE/SE winds. It's not a month to book a surf trip around; it's a month to chase flash windows between typhoon frontal passages.
Average Spot conditions at Sendai in August
Swell history for August
Wind history for August
Swell quality
Analyze the groundswell consistency at Sendai during August. 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 August.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Sendai for August. 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.