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Conditions at Mangamanu in December
December: Summer Doldrums and Fun-Sized Waves
December brings the official start of summer and the quietest surf season at Mangamanu. Average wave heights are 5ft (1.5m) with periods dropping to 9.1s, the lowest of the year. The swell direction shifts somewhat - S swell is still significant at 19.6%, but ENE (10.4%) and E (10.4%) become more prominent, though these are less favorable for the beach's orientation. Wind is ideal only 48% of the time, and NE/ENE winds often dominate, creating chop. Still, when the high pressure drifts away and a low approaches from the west, a NW wind change can groom the upcoming SSE swell into clean, playful waves. Water temps are back up to 14.3°C (58°F), making for pleasant warm-weather sessions. It's a great month for longboarding and practicing maneuvers, but don't expect epic power.
Average Spot conditions at Mangamanu in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Mangamanu 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 Mangamanu for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Mangamanu 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 Mangamanu.