Conditions at Louro in December
December: Prime Time in the Deep Winter Window
December is prime time at Louro. Average swell height reaches 5-6ft (1.7m) and wave periods sit around 12.3s, so the ocean is full of long-period, ground-swell power. W (16.3%) and WNW (27.1%) mix with a healthy 17.6% from the preferred S-SSW-SW-WSW window, giving this month one of the best balances of size and ideal swell direction. Offshore winds blow 42% of the time, led by NE (12.6%), ENE (10.5%) and NNE (6.9%), and the cleanest days coincide with high pressure pushing down from the Bay of Biscay. Of course, S/SSW/SW/WSW onshore winds still make up about 34% of the wind, and these are the days that tear the surf apart. Water temperature drops to 13.9°C, air temps average 12.4°C, and the storm track delivers over 5.6 mm/day of rain. If you can pick the winds, December is worth the winter suit.
Average Spot conditions at Louro in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Louro 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 Louro for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Louro 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 Louro.