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Conditions at Sun Beach in December
December: Winter Swell Arrives, Trades Pick Too
December closes the year with the strongest winter pattern. Average swell height is 1.5ft (0.5m), period is 4.8 seconds, and the favourable N/NNW sector is back up to around 23% of the total swell distribution. Northerly windswell from cold fronts is now a regular feature, and the NNW component alone contributes 13%. There are rare 3-5ft (0.9-1.5m) waves from the N/NNW sector in this month's averages - the closest Sun Beach gets to real surf.
The trade wind regime is still dominant, however: E/ENE/ESE winds make up about 59% of all wind observations. Offshore S/SW/SSW/WSW winds account for only 4% of the time, so even when swell shows up it often has to fight a cross-shore breeze. Air temps cool to 24°C (75°F), water sits at 25°C (77°F), and rainfall is low at 0.86 mm/day. December is the last realistic window to score a few short-period peaks before the spring fade returns.
Average Spot conditions at Sun Beach in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Sun Beach 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 Sun Beach for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Sun Beach 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 Sun Beach.