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Conditions at Gunnamatta in December
December: Summer Returns with Small, Punchy SW Swell
December brings the start of summer and the beginning of the Southern Hemisphere low season. Average swell height is 4-5ft (1.4m), the wave period is 11.3s, and the swell mix is overwhelmingly SW at 54.3%, with SSW adding 17.4% and WSW 8.7%. There is plenty of fun-sized 3-5ft (1-1.5m) surf, with SW alone contributing 25.7% in that class and another 13.2% in the 5-6.5ft (1.5-2m) range. It is smaller than winter, but it can still be punchy and rippable on the right banks.
The wind pattern is governed by summer sea breezes. SW at 12.6%, SSW at 12.3% and S at 10.2% dominate the wind rose, while ideal offshore conditions drop to 15%. Most afternoons are bumpy and onshore. The magic happens in the early morning with light ENE/E winds, before the seabreeze kicks in. Water temperature is warm at 17.7°C, air averages 16.5°C, and rainfall is lower at 1.87mm/day. It may not be pumping, but December still serves up classic summer beach break waves.
Average Spot conditions at Gunnamatta in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Gunnamatta 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 Gunnamatta for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Gunnamatta 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 Gunnamatta.