Conditions at Lido di Ostia in December
December: The Crown Jewel of the Roman Surf Year
December takes the crown at Lido di Ostia. This is the month with the highest average swell height (3.5ft / 1.1m) and the best wind statistics - ideal winds blow 25% of the time, the most all year. The offshore window from NE, ENE, E, and ESE is a powerhouse at 30.5%, while onshore west winds shrink to just 13%. The swell rose shows the expected westerly pattern, with WSW delivering 14% and W 11%, plus meaningful contributions from NNW, SE, and SSE as the Mediterranean low-pressure systems swirl around. Periods average 5.7s, but bigger events can push 7-9s, offering a truer groundswell punch. The air is cold (8°C avg), with occasional frosts, and the sea is 15.1°C, so a 5/4 wetsuit is in order. If you want to score Lido di Ostia at its best, circle December on the calendar - when a Genoa low dredges up W/WSW swell and the Levante wind cleans it up, this Roman stretch of sand actually fires.
Average Spot conditions at Lido di Ostia in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Lido di Ostia 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 Lido di Ostia for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Lido di Ostia 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 Lido di Ostia.