Conditions at Niijima in October
October: Maximum Directional Consistency, Onshore Battle
October has the highest frequency of optimal swell direction of any month - a massive 64.3% from the NE-SE quadrant. ENE and E each deliver 21.0% and 20.9%, ESE adds 12.3%, and SE adds 7.0%. Average height remains 1.6m (5ft) and period 8.2s. This is the month when the Pacific truly turns on, with typhoons still lurking in the subtropics and mid-latitude lows starting to intensify across the western North Pacific.
Unfortunately, the same atmospheric setup that generates the swell also strengthens the northeast monsoon. NE winds blow 23.6% of the time and ENE 16.4%, making 40% of all wind onshore from the east and northeast. Offshore W and WNW only account for 13.1%, and ideal wind drops to 10% - the lowest of the year. You will often see great east swell lines on the buoy, but a howling NE wind will make Niijima look like a washing machine. The magic happens when a high-pressure ridge builds over Japan and compresses the gradient, letting a light W/SW offshore blow while the ENE swell still pulses. Those are among the best waves of the year. Water is still warm at 24.2C, air at 21.8C, and rain frequent at 7.82 mm/day.
Average Spot conditions at Niijima in October
Swell history for October
Wind history for October
Swell quality
Analyze the groundswell consistency at Niijima during October. 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 October.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Niijima for October. 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.