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Conditions at Mooloolaba in December
December: Summer Is Locked In
December brings the summer tradewind regime into full swing. Average swell sits at 4-5ft (1.4m) with a short-period 7.9s average, making for a lot of chop and crumble on the east-facing bank. E swell is dominant at 28.4%, with ESE (20.3%), SE (12.2%), ENE (14.8%) and NE (8.2%) completing the picture. Onshore SE winds (15.3%) and ESE winds (11.8%) are frequent, while NNW (14.4%) and NNE (12.2%) offer cross-shore alternatives but rarely true offshore conditions. Ideal wind frequency is only 14%, so the window for clean surf is narrow. Water temp warms to 24.9°C, air temp averages 24.1°C, and rainfall increases to 4.68mm/day. With the Australian summer heat and moisture in full effect, Mooloolaba becomes a bank-dependent wave rather than an all-day surf.
Average Spot conditions at Mooloolaba in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Mooloolaba 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 Mooloolaba for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Mooloolaba 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 Mooloolaba.