Conditions at Choshi in August
August: Typhoon Watch and Warm Water
August is the hinge point of the year at Choshi. Average swell heights climb back to 4-5ft (1.4m) and the period lengthens to 9.5s, signalling the first taste of tropical groundswell. ESE and SE swells dominate the wave rose, together providing over 47% of the observations, with SSE/S also on the rise. This is the month when typhoons start tracking closer to Japan, and every passing system to the south acts like an engine for long-period SE/S swell. Yet the wind still holds the surf back: SSW and S winds are the top flow directions, and the ideal wind frequency sits at a dismal 26%. The water peaks at 23.7°C, making for beautiful summer sessions, but the surface often has that bumpy, lumpy trade-wind look. Keep a close eye on tropical storm tracks; if a typhoon passes far enough east and a N/NW wind kicks in behind it, August can dramatically overdeliver.
Average Spot conditions at Choshi in August
Swell history for August
Wind history for August
Swell quality
Analyze the groundswell consistency at Choshi 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 Choshi for your next trip in August.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Choshi 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 Choshi.