Conditions at Choshi in October
October: The Turning Leaf Season of Surf
October marks the true resumption of quality surf at Choshi. The average swell height is a healthy 5-6ft (1.7m), the wave period sits at 9.5s, and the ideal wind frequency rises to around 39%. The wave data still shows a huge NE/E/ENE bias, with these directions accounting for over 60% of the observations. These are the swells generated by the first strong extratropical storms of the season in the North Pacific. The wind pattern is now openly favouring offshore conditions, with NE, NNE and N flows combining for about 45%, while SE-through-SW onshore winds fade to around 20%. Water temperatures hold at 20.9°C, making it the last month where a thin spring suit works. The autumn transition brings both consistent energy and clean surface conditions, and the mix of mid-period E/NE swell with occasional long-period S/SW groundswell makes October one of the most surfable months of the year at Choshi.
Average Spot conditions at Choshi in October
Swell history for October
Wind history for October
Swell quality
Analyze the groundswell consistency at Choshi 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 Choshi for your next trip in October.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Choshi 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 Choshi.