Seal Point seasonal overview
Best Surf Season (May - July)
The heart of winter sees the Southern Ocean roar to life, sending consistent, long-period groundswells marching toward the Cape. Average wave heights peak at a solid 3.1m with periods averaging 12.4–12.5s, offering a steady diet of powerful, well-structured lines. Offshore wind potential also hits its annual high at 36–37 percent, driven by frequent cold fronts that deliver clean W to NW winds in their wake. This is when Seal Point truly fires, with overlapping SW and SSW swells wrapping perfectly into the bay.
Fair Surf Season (April, August - September)
Shoulder months bring a slight drop in consistency but still offer excellent potential. April averages 2.7m at 11.8s, while August and September hold onto 3.0–3.1m with periods around 12s. Ideal wind percentages cool to 28–31 percent, meaning more onshore days from the E and ENE. However, when a strong high-pressure system sits just south and a cold front passes, the windows of W/NW wind align with the remaining SW groundswell, producing firing sessions.
Low Surf Season (October - March)
Spring and summer bring a noticeable lull in size and consistency. Average wave heights dip to 2.4–2.6m and periods drop to 10.9–11.1s. The wind pattern becomes dominated by persistent E and ENE breezes, blowing directly onshore and ruining wave quality. Ideal offshore wind frequency falls to 21–25 percent. While occasional long-period pulses from distant storms in the Southern Ocean can still deliver pumping days, they are often accompanied by poor wind. Patience and careful timing are essential during these months.
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Conditions at Seal Point in December
December: Summer Lull Sets In
December closes the year in typical summer mode. Average swell height drops to 2.5m with a period of 10.9s. Swell direction is dominated by SW (20.2%) and SSW (17.5%), though these are often accompanied by short-period windswell. Easterly winds are strong: ENE (10.5%), E (17.6%), and ESE (9.2%) blow over 37% of the time, creating messy, onshore conditions. Ideal offshore wind is only 22%. The waves are small to moderate, and the quality is heavily wind-dependent. However, on the rare days when a southerly buster or cut-off low delivers a burst of WNW wind, Seal Point can still offer fun, clean waves, especially on a rising SW swell. Patience is the name of the game.
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.
