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Conditions at Seal Point in December
December: Summer Heat, Easterly Chop and Early Windows
December sees Seal Point fully settled into summer mode. Average swell is 8ft (2.5m), period is 10.9s, and the main swell source is a mix of SSW (17.5%) and SW (20.2%) groundswell plus a healthy E-ESE-SE-SSE signature of around 16 percent. The east and southeast pulses are often the most rideable, especially when they fill in at 5-8ft (1.5-2.4m) with clean period.
Wind is the crux. The onshore E (17.6%), ESE (9.2%), SE (5.3%) and SSE (3.8%) directions combine for 36 percent, while offshore W/WNW/NW/NNW falls to around 18 percent. Ideal surf wind sits at just 22 percent. Water has warmed back up to 19.3°C and air temps average 20.3°C, making for pleasant mornings. The mornings are the play; once the seabreeze kicks in, the wave quality drops fast. A berg wind (NW) day in December can still produce surprisingly fun, glassy waves.
Average Spot conditions at Seal Point in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Seal Point 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 Seal Point for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Seal Point 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 Seal Point.