Conditions at Choshi in July
July: Summer South Swell and Onshore Winds
July provides a glimpse of proper south swell at Choshi, but the winds refuse to cooperate. Average heights remain small at 4ft (1.2m), yet the wave direction data shows the largest south/southeast contribution of the year, with SE and SSE swells making up a combined 32.5%. These swells are the pulse of tropical storms and typhoons far to the south, sending steep, crumbling energy toward the south-facing coast. However, the Pacific High also peaks in July, and the wind rose shows SSW as the dominant direction at 18.5%, with SW and S flows adding another 21%. As a result, the ideal offshore wind window drops to 28%, and much of this southern energy is mowed down by onshore winds. Frustratingly, the combination of warm 20.7°C water and the constant 8.9s period gives the waves plenty of push, but the constant onshore texture kills the quality. Only early morning northerly breezes provide clean windows.
Average Spot conditions at Choshi in July
Swell history for July
Wind history for July
Swell quality
Analyze the groundswell consistency at Choshi during July. 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 July.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Choshi for July. 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.