Conditions at Niijima in June
June: The Rainy Season Lull
June is the heart of the Japanese rainy season, and the surf reflects it. Swell height plateaus at 1.3m (4ft) with a 7.5s period. Directionally, the optimal NE-SE quadrant drops to 37.7%, while the dominant sources shift south: S at 14.8%, SSW at 16.9%, and SW at 13.9%. For a spot that needs east in the swell window, this is a clear step down in quality. ESE still contributes 12.5% and E 8.7%, so it is not completely flat, but more of the energy is soft, monsoon-forced windswell.
The wind pattern offers more hope. Ideal wind reaches 20%, with WSW at 17.4% and SW at 13.8%; these are true offshore directions. The problem is that the prevailing SW/WSW breeze is also what generates much of the sloppy south windswell, so it brings both the waves and the texture. Look for breaks in the baiu front when the wind goes light variable in the morning - those windows can deliver glassy waist-to-chest-high sets on the better east-facing reefs. With air at 21.9C, water at 22.6C, and 8.53 mm/day of rain, pack the rain jacket and keep expectations reasonable.
Average Spot conditions at Niijima in June
Swell history for June
Wind history for June
Swell quality
Analyze the groundswell consistency at Niijima 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 Niijima for your next trip in June.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Niijima 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 Niijima.