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Conditions at Kalapaki Beach in December
December: Big North Swell, Flat South-Facing Bay
December is the peak of winter for open-ocean swell - average heights hit 7.9ft (2.4m) on 11.9s periods - but it is one of the worst months for Kalapaki. The waverose is dominated by NNW (15.7%), ENE (11.8%), NNE (10.5%) and NE (9.9%), with almost no energy in the SE/SSE/S/SSW quadrant (0.9%). A few 5-6.6ft (1.5-2m) and 6.6-8ft (2-2.5m) events wrap from the southeast, but they are isolated.
Winds are variable: ENE (28.4%), E (17.9%) and NE (12.2%) compete with a winter increase in S/SSW Kona flow (14.1% combined bad-onshore directions). True offshore N/NNW/NW winds account for 12.9%, but without swell they only produce flat, glassy conditions. Ideal winds sit at 29%, water temp drops to 24.8°C, air averages 23.7°C (19.4-27.0°C), and rain is 2.52 mm/day. This is a beautiful bay, but for surfing, December is a month to look elsewhere.
Average Spot conditions at Kalapaki Beach in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Kalapaki 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 Kalapaki Beach for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Kalapaki 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 Kalapaki Beach.