Conditions at Long Sands in December
December: Winter's Firing Line
December matches November for raw stats - 1.3m (4ft) average swell, 7.8s period, and 37% ideal wind - but with a distinctly deeper and more powerful feel. The average period is the year's highest, and the distribution of bigger waves is wider, with N, NNE, and NNW all capable of producing 1.5-2.5m (5-8ft) sets. The NE/ENE/E quadrant still supplies the bread-and-butter waves, but December is the month when a proper North Sea storm can stack up a serious swell against the coast.
Wind statistics are excellent for surf quality: WSW and W blow 15.6% and 14.1% of the time respectively, with SW contributing another 12.8%, giving Long Sands an offshore-friendly pattern for over half the month. Onshore NE/E winds are scarce, so even when the swell is maxing out, surface conditions often stay clean. This is cold, serious winter surfing: water temperature 8.3°C, air temps average 5.7°C, and occasional bitter minima near -2.5°C. Thick hood, gloves, boots and a 5/4 are non-negotiable, but the reward is the most reliable and powerful surf of the year.
Average Spot conditions at Long Sands in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Long Sands 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 Sands for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Long Sands 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 Sands.