Conditions at Manly in December
December: The Summer Peak Kicks In
December brings the best all-around reliability of the year. Average swell height eases slightly to 5ft (1.5m), but ideal wind percentage is 44% and conditions are consistently clean. The swell rose is dominated by ENE, SE, SSE and E directions, with most waves in the 3-6ft (1-2m) range and period a quick 8.3s. By direction, December is not the classic west-swell producer, but the NE/ENE offshore regime makes it the most user-friendly time at Manly. The air is warm at 21°C, water temperature sits at 21.5°C, and rainfall is moderate. You will find clean, fun-sized beachbreak peaks most mornings, with occasional bigger pulses from SSE-S when a coastal trough sits off New South Wales. This is the month to be in the water early and often.
Average Spot conditions at Manly in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Manly 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 Manly for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Manly 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 Manly.