Conditions at Kitaizumi in September
September: Typhoon Season Peaks
September is the typhoon season peak and the beginning of the autumn shift in wave quality. The average swell height jumps to 1.2m (4ft), the highest of the entire year, while the period climbs to 8.8s. The swell direction is very favorable for this beach: E is the dominant source at 32.2 percent, followed by ESE at 28.5, ENE at 15.9, and SE at 13.0. Significant amounts of 1.5-2.5m (5-8ft) ENE and E swell are present in the data, often the residue of distant typhoons or early-season mid-latitude lows. However, the wind ideal percentage is just 33 percent, because northeasterly to easterly quadrant winds also flow strongly in late summer, and those are onshore at Kitaizumi.
Water temperature is still warm at 23.1°C, air temperature averages 21.8°C, and the rainy season is back with 5.66 mm/day. As autumn progresses, each passing typhoon or tropical depression brings more organized swell; if a W or WNW offshore wind lines up, September can produce the best wave of the year in warm water.
Average Spot conditions at Kitaizumi in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Kitaizumi during September. 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 Kitaizumi for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Kitaizumi for September. 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 Kitaizumi.