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Conditions at Gas Chambers in December
December: Peak Size and the Offshore Grind
December is the biggest month on average, with wave heights around 5ft (1.6m) and a 10.0s period. The northeast quadrant dominates harder than any other month: NE 42.9%, NNE 24.3%, ENE 19.9%, and NNW 3.0%. There is also more 6.5-8ft (2-2.5m) energy lurking than at any other time of year, so the heavy water is real. Mid-winter in the North Atlantic is in full swing.
But December also has the lowest ideal wind percentage of the year at 38%. The same pressure gradient that generates the swell produces strong ENE/NE offshore winds, with ENE in the 20-30kph class blowing 25.5% of the time and another 9% in the 30-40kph range. Expect glassy dawn pockets and bumped-up afternoon surfaces. Water temperature drops to 27.3°C, air averages 25.5°C, and rainfall is 2.37mm/day. December delivers the goods, but it demands patience.
Average Spot conditions at Gas Chambers in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Gas Chambers 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 Gas Chambers for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Gas Chambers 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 Gas Chambers.