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Conditions at Cat Bay in December
December: Summer Return To Glory
December brings summer back to Cat Bay and with it 43% ideal surfing conditions. The average swell height is 1.4m (4.6ft) at 11.3s, and the swell source is overwhelmingly southwest: SW 54.3%, SSW 17.4%, WSW 8.7%. Direct north-quadrant swell is negligible, so the bay relies on refracted SW energy, but the consistency is excellent. Wave heights are predominantly in the fun-sized 3-5ft (0.9-1.5m) envelope, with a good 30% of the wave distribution falling in the 5-8ft (1.5-2.5m) range. Wind observations show a strong SW presence at 14.1%, WSW at 11.5%, and SSW at 10.4%, while NNW onshore flow is only 4.5%. With water temperature warming back up to 17.0°C and air temperatures averaging 16.5°C, December is a fine month to end the year in the water.
Average Spot conditions at Cat Bay in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Cat Bay 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 Cat Bay for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Cat Bay 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 Cat Bay.