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Conditions at Merimbula Bar in December
December: Summer Lull
December completes the turn toward peak summer. Swell averages 1.6m (about 5ft), but it's mostly NE (18.1%) and ENE (12.4%) windswell with a forgettable 8.0s period. The S/SSW quarter still supplies a workable 39%, but it frequently comes with onshore winds or gets lost in the afternoon bump.
Ideal wind is just 23%, with NNE (17.0%) and SSW (13.6%) dominating. The air is warm at 18.4°C, water has rebounded to 18.8°C, and summer rainfall sits at 2.61mm/day. It's a great time to be at the beach, but the Bar is more likely to produce average peelers than winter's grinding pits. Wait for a Tasman low or strong southerly front to break the pattern.
Average Spot conditions at Merimbula Bar in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Merimbula Bar 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 Merimbula Bar for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Merimbula Bar 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 Merimbula Bar.