Conditions at Oniguchi in June
June: Typhoon Season Turns Onshore
June is when the swell direction flips to the southwest-the ideal swell window for Oniguchi-but the wind simultaneously turns against the spot. Average swell height is 1.0m (3.3ft), average period is 7.0s. The swell rose is now dominated by SW at 21.5%, SSW at 11.7% and WSW at 9.8%, while E/ESE still add a combined 24.7%. The problem is wind: ideal offshore flow is present only 34% of the time, with SW winds at 10.4%, WSW at 8.8% and E at 10.8%. The onset of the summer monsoon brings heavy moisture; precipitation jumps to 18.18 mm/day. Air temperature averages 23.9°C, water temperature is 24.0°C. The combination of tropical moisture and onshore wind makes most June surf messy and lumpy. Only a post-typhoon wind swing can turn the SW swell into something clean.
Average Spot conditions at Oniguchi in June
Swell history for June
Wind history for June
Swell quality
Analyze the groundswell consistency at Oniguchi during June. 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 June.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Oniguchi for June. 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.