Conditions at Kugenuma in January
January: Midwinter Offshore Groomers
The North Pacific winter machine is running on all cylinders, and Kugenuma sees one of the largest SW-swell shares of the year. Fully 29.2% of the observed swell comes from the SW, with another 10.3% from the SSW, 5.9% from due south and 4.1% from the SSE. That places most of the wave energy directly in the optimal window for this SSW-facing beach. The average swell height is a modest 0.7m (2-3ft), and the average period of 7.8s falls in the punchy, rideable range rather than long-period territory. Wave quality is decided by the wind, and January's wind rose is dominated by NNE (29.3%), NE (12.6%) and N (9.1%), all of which are offshore at Kugenuma. Still, the ideal-wind share is 14%, a reminder that raw direction alone is not enough - wind speed and timing matter. With air temperatures averaging 2.3°C and water at 16.2°C, this is winter wetsuit territory. Watch for the pressure gradient between the Siberian High and south-coast lows: when it tilts to the north, the bay cleans up quickly and those S/SW groundswells turn into fun, smiling peaks.
Average Spot conditions at Kugenuma in January
Swell history for January
Wind history for January
Swell quality
Analyze the groundswell consistency at Kugenuma during January. 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 Kugenuma for your next trip in January.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Kugenuma for January. 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 Kugenuma.