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Conditions at Long Beach in December
December: The Apex of Winter
December is the apex of the wet season and arguably the most reliable month for big surf at Long Beach. Average swell height reaches 8.5ft (2.6m), tied with January for the year's highest, and periods of 12.4s mean the swell is both large and organized. The dominant directions shift slightly west: W (19.3%), WSW (16.2%), SW (7.0%) and WNW (3.7%) are the main players, with SSW and S adding a little extra energy. The wind regime is excellent for surf quality: E (17.5%) and ESE (14.2%) are the two most frequent wind directions, and combined with ENE (8.4%) and NE (3.4%) deliver 43.5% offshore flow. Ideal conditions occur 37% of the time, second only to January. Air temps hover near 5.1°C, water temps are cold at 8.1°C, and precipitation is heavy at 9.93mm/day. These are the storm windows that produce powerful, grinding, potentially XL waves on the exposed sandbars - a true reward for the hardcore surfer.
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.