Conditions at Arenillas in January
January: Prime Time for the North Atlantic Storm Machine
January is the peak of the winter season at Arenillas. The North Atlantic storm track is on full fire, and the bay gets hit repeatedly by powerful northwest swells. The average wave height is around 6-7ft (2.0m) with a long period of 12.9s, so there is plenty of push. The wave rose shows 36.7% of the swell from NW, 18.6% from WNW and 10.8% from NNW - exactly the directions that light up Arenillas. Head-high to well-overhead sets are common, and the raw North Atlantic energy is often amplified by the long period. The wind story is also favorable: southerly and southwesterly winds dominate the offshore quadrant, with SSW making up 14.3% of the wind rose and S 10.1%, giving an ideal wind window 42% of the time. Air temperatures average 9.9°C (min 2.1°C, max 19.8°C) with rain at 3.52mm/day, so expect a few cold fronts to sweep through. Water temperature sits at 13.1°C, so a good winter wetsuit is key to unlocking these pumping waves. Keep an eye on the pressure gradient - a deep low west of Ireland usually means NW swell and offshore S-SSW wind at Arenillas.
Average Spot conditions at Arenillas in January
Swell history for January
Wind history for January
Swell quality
Analyze the groundswell consistency at Arenillas during January. 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 Arenillas for your next trip in January.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Arenillas for January. 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 Arenillas.