Conditions at Gilleleje Havn in December
December: The Peak of the Windswell Window
December, along with January, is the closest Gilleleje Havn gets to a real best season. Average swell height reaches about 2ft (0.6m) and average period climbs to 4.1s. This is still short-period windswell, but the North Atlantic and Norwegian Sea lows are now firing regularly, and the wind tends to have more W/SW/WSW flow. Wave directions are led by WSW, SW, W and SSW, with a fair amount of NNW and WNW mixed in. The ideal surfing wind statistic sits at 1 per cent, which is low, but the more active synoptic pattern means that when the troughs arrive there can actually be a wave to ride. Wind distribution shows WSW, SW, W and SSW all in the 9-13 per cent range, giving a mostly offshore tendency at this exposed harbour. Air temperatures average 2.1°C, water temperature drops to 5.1°C, and precipitation is around 2.3mm/day. Short-period and cold, but if you time the post-frontal S/SSW window with a N/NE fetch, December can produce the most fun, punchy little waves the spot has to offer.
Average Spot conditions at Gilleleje Havn in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Gilleleje Havn 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 Gilleleje Havn for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Gilleleje Havn 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 Gilleleje Havn.