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Conditions at La Jolla in December
December: Short-Period Winter Swell
December closes the year with the second-shortest average period at 10.4s and an ideal wind percentage of only 36 percent. The swell direction is heavily NNE (29.6 percent) and NE (14.1 percent), with a secondary S (22.4 percent) and SSW (14.2 percent) source. Heights in the NNE quadrant peak in the 5-6.5ft (1.5-2m) range, giving the spot more raw energy than the average 4.5ft (1.4m) suggests, but the shorter period means the waves tend to be sectiony and less predictable.
The wind blows from the N/NNE quadrant over 44 percent of the time, often at 10-30kph, further degrading the surf. Water temperature is 26.9°C, air temperatures average 23.2°C, and precipitation is low at 0.13mm/day. December offers the same winter potential as January but with even less consistent wind quality, making it a low-surf-season month at this east-facing spot.
Average Spot conditions at La Jolla in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at La Jolla 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 La Jolla for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at La Jolla 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 La Jolla.