Conditions at Kitaizumi in December
December: The Winter Engine Turns On
December closes the year with classic winter conditions. The average swell height is 1.0m (3ft), the average period is 9.6s, and the directional spread includes a healthy mix of NE at 14.2 percent, ESE at 13.4, E at 12.2 and ENE at 11.9. There is still a good amount of NNW and NNE energy, reflecting the strong northwesterly flow that dominates for much of the month. WNW wind blows 23.8 percent of the time, NW another 16.6, and W adds 12.7, so offshore winds are frequent and often strong. The ideal surf wind percentage is 43 percent, and when the pressure gradient tightens, those offshore winds can go from light groomers to full-on blowguns.
Water temperature falls to 12.8°C, air temperature averages 7.6°C, and precipitation drops to 2.29 mm/day. This is the start of the true winter season in the North Pacific, where each passing storm delivers another round of clean, powerful surf to the east-facing coast of Kitaizumi.
Average Spot conditions at Kitaizumi in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Kitaizumi during December. 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 Kitaizumi for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Kitaizumi for December. 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 Kitaizumi.