Conditions at Katagai in July
July: Summertime Windswells and the Typhoon Seed
July delivers the classic Japanese summer surf: plenty of SE/SSE and E/ESE swell, but most of it is short-period windswell at 1.1m (3-4ft) with an 8.4s average period. Wind remains unkind, with only 25 percent offshore flow and SSW/SW winds dominating a large share of the time. The good news is that early-season typhoons can already spin up longer-period pulses from the southeast, injecting more energy into the water. Water temps reach a warm 21.3°C and air temps average 24.4°C, so a thin summer suit or boardshorts are in play; the challenge is finding a window when the afternoon sea breeze has not already chopped it up.
Average Spot conditions at Katagai in July
Swell history for July
Wind history for July
Swell quality
Analyze the groundswell consistency at Katagai 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 Katagai for your next trip in July.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Katagai 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 Katagai.