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Conditions at Abrolhos Islands in December
December: Back to the Summer Grind
December completes the return to summer conditions. Average swell height remains around 2.3m (7.5ft), but the average period drops to 11.3s, taking much of the punch out of the waves. The swell direction becomes very SSW-heavy at 38.2%, with S at 14.2% and SW at 12.9%. Most of the energy sits in the 1.5-2.5m (5-8ft) range, but the shorter period and poor wind alignment make it feel far less exciting.
The wind statistics are grim: S winds account for 40.8%, SSE for 27.5%, and SSW for 10.6%, with a large portion blowing 30-50kph. Ideal offshore wind is down to 3% of the time, the joint-lowest of the year. The Abrolhos reefs are mostly onshore, messy and blown out. If you are there over the holidays, focus on the first hours of daylight and look for sheltered corners, because the summer southerly machine takes over by midday. Water temperature is 21.9°C, air averages 20.9°C, and rainfall is very low at 0.18 mm/day.
Average Spot conditions at Abrolhos Islands in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Abrolhos Islands 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 Abrolhos Islands for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Abrolhos Islands 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 Abrolhos Islands.