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Conditions at La Isla in December
December: Summer Arrives, but Offshore Flow Still Rare
December sees the average swell height settle to 1.5m (4.9ft) with a period of 12.8s. The swell window is again dominated by SSW (88%) and SW (10%), giving La Isla a consistent supply of shoulder-to-head-high waves in the 3-6ft (1-1.8m) range. It is a fun, user-friendly swell compared with the heavy winter waves.
The wind, however, has not yet caught up with the calendar. Ideal offshore flow remains 0%, and the S/SSW/SW quadrant still blows around 92% of the time, with SW winds reaching 10-20kph more than 13% of the month. The typical December day is cleanest in the early hours before the southerly breeze fills in, but true perfection remains elusive.
Air temperatures warm to 14.7-25.3°C, water temperature rises to 17.4°C, and precipitation is minimal. The potential is there - now it is just about catching the rare offshore moment as summer builds.
Average Spot conditions at La Isla in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at La Isla 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 Isla for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at La Isla 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 Isla.