Conditions at Katagai in September
September: A Mixed Bag of Typhoon Swell and Onshore Winds
September occupies a strange place on the calendar. The swell window is almost ridiculously favorable - E and ESE swells alone make up 48 percent of the spectrum, with ENE and SE filling in the sides - and the average height is a healthy 1.3m (4-5ft) with a 9.1s period. But the wind statistics are the worst of the year, with ideal offshore flow only 20 percent. NE/ENE winds blow over 30 percent of the time, directly ruining the shape of the abundant easterly swell, while SSW/SW flow adds further inconsistency. Precipitation hits 6.84 mm/day, the wettest month, and water temps remain high at 24.1°C. For the surfer, September is about waiting for the occasional post-frontal NW flow or the right typhoon track to align swell with offshore wind.
Average Spot conditions at Katagai in September
Swell history for September
Wind history for September
Swell quality
Analyze the groundswell consistency at Katagai 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 Katagai for your next trip in September.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Katagai 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 Katagai.