Conditions at Ikumi in August
August: Tropical Swell Teases, But the Window Stays Narrow
August is the wild card of the summer. Average swell height rises to 3.6ft (1.1m) and the average period jumps to 9.0s - a sign of distant typhoon energy. The swell distribution shows SSE (29.9 percent), S (26.5 percent), and SE (24.5 percent) dominating, with ESE climbing to 6.1 percent but still minor. The entire NE-ESE window is just 6.3 percent, so while there is more power in the water, it is still predominantly from the south/southeast - a direction that doesn't serve Ikumi well. The good news is the wind regime remains favourable: offshore SW (13.2 percent) and WSW (11.8 percent) combine with other offshore components to give an ideal wind percentage of 41 percent. This means the surf is often clean, but the waves are inconsistent and lack the east-north-east line the beach requires. Water temperature peaks at 27.8°C, air at 27.4°C, and rain remains frequent at 6.29 mm/day. On the rare day a typhoon tracks far enough east to inject ESE swell, expect fun, punchy waves - but such days are the exception.
Average Spot conditions at Ikumi in August
Swell history for August
Wind history for August
Swell quality
Analyze the groundswell consistency at Ikumi 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 Ikumi for your next trip in August.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Ikumi 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 Ikumi.