Conditions at Kastro Point in December
December: Peak Power and Winter Consistency
December takes over where November leaves off, delivering the highest average swell height of the year at 0.8m (2.6ft). The average period is 5.9s, so the energy is still windswell-dominated, but there are more frequent waves and the offshore wind window widens to 27%. The south quadrant contributes 27.3% of the swell, with SSW (9.2%), S (7.4%), SSE (5.4%) and SE (5.3%) all in play; SW/WSW also show strongly (14.7% and 11.0%), but those are less well aligned. The winter storm track is now in full swing, and strong frontal systems crossing the Mediterranean routinely produce visible lines on the beach. Weather is fully winter: air averages 6.9°C, water drops to 17.6°C, and precipitation is the highest of the year at 4.86 mm/day. When the wind is offshore from the north and a new S/SSW swell is filling in, December is the month where Kastro Point offers its best chance at a memorable winter session.
Average Spot conditions at Kastro Point in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Kastro Point 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 Kastro Point for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Kastro Point 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 Kastro Point.