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Conditions at Kealia Beach in December
December: Cash In Your Holiday Swell
December is one of the best months of the year at Kealia. Average wave height tops out at 8ft (2.4m) with an 11.9s period, and the North Pacific storm track is firing on all cylinders. The swell rose is beautifully mixed: NNW leads at 15.7%, NNE 10.5%, NE 9.9%, ENE 11.8%, and N/NW adding another 9.6%. This means the east side gets both classic north energy wrapping around the island and a steady stream of swell hitting the exposed eastern corners.
What makes December stand out is wind: ideal offshore flow climbs to 16%, the second-highest of the year. Trades still appear (ENE 28.4%, E 17.9%), but more frequent cold fronts and ebbing highs give westerly and northwesterly winds a chance. When the winds align, Kealia can turn on with consistent 6-10ft (1.8-3m) walls and relatively clean faces. Water is 24.8°C, air 23.7°C, and rain is active at 2.52mm/day. It is wet, but it is worth it.
Average Spot conditions at Kealia Beach in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Kealia Beach 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 Kealia Beach for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Kealia Beach 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 Kealia Beach.