Conditions at Oniguchi in October
October: Offshore Winds Peak
October is statistically the cleanest month at Oniguchi, with ideal offshore wind present 68% of the time. The average swell height is 1.1m (3.5ft), and the average period is 8.2s. The swell rose shows a strong easterly bias: E is 26.4%, ENE is 18.4%, ESE is 10.0%, while NNW is 10.4% and NW is 9.2%. The SW sector is small at under 4%, so size remains moderate and direction can be frustrating. Winds are dominated by NNW at 23.7%, ENE at 17.4%, E at 10.8% and NE at 10.7%. Air temperature averages 23.0°C, water temperature is still warm at 25.7°C, and precipitation drops to 4.74 mm/day. The surf quality is often high-clean, lined-up, and well groomed-even if the swell direction does not always favor Oniguchi. When the first proper NW storm sends W/WNW energy into the mix, October can easily produce the best session of the autumn.
Average Spot conditions at Oniguchi in October
Swell history for October
Wind history for October
Swell quality
Analyze the groundswell consistency at Oniguchi during October. 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 Oniguchi for your next trip in October.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Oniguchi for October. 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 Oniguchi.