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Conditions at Pennington Bay in December
December: The Onshore Summer Pattern Settles In
December brings Pennington Bay back to summer's weakest surf quality. There is still energy in the ocean - average swell is 1.7m (5.6ft) with an 11.1s period - but the wind statistics paint a tough picture. The SE and SSE quadrants account for 18.5% and 15.4% of all winds respectively, and with the S and ESE contributions, over half the month is onshore. Ideal offshore wind falls to just 10%, usually confined to a small predawn window before the seabreeze becomes a daily fixture.
The swell mix is still mostly SSW and SW - 39% and 28% - with S only managing 16%. So the waves are often bumpy, crumbly and hard to line up for long stretches. Water temperature is a pleasant 17.6°C, air averages 17.5°C, and precipitation is a low 0.71mm/day. It's a beautiful time to be at the beach, but bring the grovel board and pick your windows carefully.
Average Spot conditions at Pennington Bay in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Pennington 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 Pennington Bay for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Pennington 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 Pennington Bay.