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Conditions at Long Beach in December
December: Summer Energy, Summer Wind
December closes the year with a classic South Atlantic summer pattern. Average swell height is 7.5ft (2.3m), average period is 11.3s, and the wave energy is less dominant than in winter. Swell direction is overwhelmingly from SW at 27.0 percent and SSW at 15.6 percent, with a useful S/SSE component to help wrap energy into the spot. Wind is predominantly ESE-SE-SSE, with SE at 23.8 percent, SSE at 22.6 percent and ESE at 3.7 percent, which gives Long Beach an offshore morning glass-off on many days. However, the strongest phases often blow between 30 and 50kph, reducing the ideal-surf statistic to 14 percent. For early sessions on a long-period SW groundswell with light ESE flow, December can still deliver fun, punchy summer surf. Water temperatures are 17.8C, air temps average a mild 19.1C, and precipitation is minimal.
Average Spot conditions at Long Beach in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Long 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 Long Beach for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Long 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 Long Beach.