Conditions at Uliss in December
December: Frozen Offshore Wind and Little Else
December is the true winter lock-in. NNW wind reaches 46.4% of all observations, with N at 12.4% and NW at 7.7%, so the offshore quadrant is blowing for nearly three-quarters of the month. But the wave rose is even more NNW-heavy: NNW 37.6%, N 12.9% and NW 7.3% represent energy moving away from Uliss. The favored southern swell sector totals just 18%, led by SSW 8.9% and S 4.9%. The average wave height bumps up to about 2.5ft (0.8m), but with a 5.0s period, that is simply choppy winter windsea from the wrong direction. Air temperatures average -7.0°C, water temp is 2.4°C, and precipitation is low at 0.52 mm/day. Ideal surf conditions are only 5%. The odd S/SSW windswell of 1-2ft (0.3-0.6m) can sneak through, but December is mostly a month for cold offshore wind and flat, lined-up water.
Average Spot conditions at Uliss in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Uliss 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 Uliss for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Uliss 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 Uliss.