Conditions at Monobegawakakou in January
January: Small but Clean - Winter Offshore Dominates
January is the heart of the winter monsoon in southern Japan. The Siberian High is locked in and the strongest local winds blow out of the NNW (26.2%) and NW (23.3%), with a further 15.9% from N and NNE. That means the beach frequently wakes up to offshore, grooming wind. The flip side is that the average swell height bottoms out at 2ft (0.6m) and the mean period is 8.6s - rideable and punchy but without real power. Southeast and ESE windswell make up a huge share of the spectrum (16% and 9.9% respectively), while the more useful SE, SSE, S and SSW directions combine for roughly 34% of all swell, with only occasional 3-5ft (1-1.5m) waves from the S and SSW. Drier, colder air dominates with 5.8°C average air and 17.7°C water, so expect clean 2-3ft (0.6-1m) runners on the good days, and an onshore/cross-shore mix when low clouds and showers push through.
Average Spot conditions at Monobegawakakou in January
Swell history for January
Wind history for January
Swell quality
Analyze the groundswell consistency at Monobegawakakou 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 Monobegawakakou for your next trip in January.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Monobegawakakou 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 Monobegawakakou.