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Conditions at Good Rats in December
December: Peak Season Arrives
December is statistically the biggest month of the year at Good Rats. The average swell height reaches a whopping 10ft (3.0m), with an average period of 11.7s, so the spot sees a high volume of powerful, heavy, occasionally epic surf. Swell direction is still squarely in the SSW (5.8%), SW (8.5%) and WSW (10.3%) window, and the distribution shows more energy in the over 2.5m (8ft+) bin than any other month. These are the days that separate the chargers from the spectators: big shoulders, shifting sandbars and intense paddle-outs.
The wind remains favourable enough to make it work. Ideal offshore flow sits at 34%, and the main offshore directions - ENE (14.0%), E (12.3%) and NE (8.7%) - combine with a modest NNE component to keep a decent number of clean days. When a strong high-pressure system settles over eastern Canada, the pressure gradient drives a crisp offshore breeze that turns the larger swells into grinding, hollow barrels. Air temps average -0.7°C (30.7°F), water temp is 6.9°C (44.4°F), and precipitation is 7.8mm/day. This is the heart of the winter surf season - cold, raw and undeniably good.
Average Spot conditions at Good Rats in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Good Rats 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 Good Rats for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Good Rats 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 Good Rats.