Manly seasonal overview
Manly Beach in Australia offers a mix of conditions year-round, with the best surfing months typically being from late summer into autumn, particularly February to April. During these months, the swell is a balanced mix of ground and wind swells, with February having 18% ground swell and 82% wind swell, while April sees an increase in ground swell to 26% and 74% wind swell. The average swell size remains steady at 1.6m, providing consistent wave heights. Wind conditions are also favorable, with February having the highest percentage of good winds at 47%, though April sees a slight drop to 37%. Winter months from May to August experience higher ground swell percentages, peaking at 31% in June, but the wind conditions deteriorate significantly, with bad winds dominating at 76% in May and peaking at 85% in July. Swell size decreases slightly in winter to around 1.4-1.5m. Spring and early summer from September to December see a return to more wind-dominated swells, with ground swell dropping below 20% by November and December. Wind conditions improve slightly, with good winds rising back to 34% in October and 42% in December. Overall, surfers will find the most reliable conditions from February to April when swell composition, size, and wind conditions align best for quality surfing at Manly.
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Conditions at Manly in December
December at Manly offers fairly consistent surf with an average swell height of 1.5m and a decent period of 8.4s, ensuring manageable yet punchy waves. The dominant swell directions are ENE (peaking at 11.18% for 1-1.5m) and E/ESE, delivering clean, rideable waves in the 1-2m range, while SSE swells (6.37% for 1.5-2m) occasionally bring more size and energy. Smaller, weaker swells from the NE and SE also contribute, keeping the lineup active. Wind conditions are workable but variable—42% of the time, winds are favorable (typically light E/NE or offshore WSW breezes under 20kph), but NNE/NE winds can strengthen (20-30kph), creating chop. Mornings often have cleaner conditions before afternoon sea breezes. Overall, expect fun, mid-sized surf with a mix of peaky beachbreak and occasional wedges, though wind management is key for optimal sessions. Offshore winds and ENE/SSE swells are your best bet.
Average Spot conditions at Manly in December
Swell history for December
Wind history for December
Swell quality
Analyze the groundswell consistency at Manly 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 Manly for your next trip in December.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Manly 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 Manly.
