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Pennington Bay - surf spot statistics
Pennington Bay seasonal overview
Best Surf Season (April - September)
The Southern Ocean roars to life during the autumn and winter months, sending consistent, long-period groundswells marching toward Pennington Bay. With the subtropical ridge pushing north, we see a climatological increase in offshore winds from the north through northwest quadrants. Ideal wind conditions blow between 27% and 28% of the time from May through July, while swell heights average a solid 1.8m to 2.0m with periods reaching 12.0s to 12.2s. This is when the bay really turns on, offering powerful, well-shaped lines that wrap into the south-facing beach. Get ready for some pumping sessions.
Fair Surf Season (March & October)
The transition months of March and October serve up a mixed bag. Swell energy remains good, averaging 1.7m to 1.8m with long periods around 11.7-11.8s, but the wind window tightens. Ideal offshore flow drops to the 12-18% range as the synoptic pattern becomes more fickle. You'll still score plenty of fun waves, especially when a strong high-pressure system parks over the continent and funnels clean NW winds across the coast. Just be ready to pick your days.
Low Surf Season (November - February)
During late spring and summer, the surf at Pennington Bay takes a backseat. While swell from the Southern Ocean still filters in at 1.7m on average with 11s periods, the dominant wind patterns shift. Sea breezes and synoptic onshore flow from the SE and SSE dominate, spoiling conditions with cross-onshore chop. Ideal offshore wind occurs less than 13% of the time. You can still find fun-sized waves on the rare day when a cold front passes through and a NW wind clean-up follows, but consistency is low. Time to plan a trip north or just take a break.
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Conditions at Pennington Bay in July
July: Mid-Winter Powerhouse – Epic Swells
July holds steady with an average swell height of 1.9m and a period of 12.0s. The swell distribution is similar to June, with SW (30.8%) and SSW (17.3%) leading, but WSW (12.5%) and W (5.9%) increase further. This spread means more swell angles hit the coast. Ideal wind remains high at 27%, with strong NW (9.8%) and NNW (11.3%) contributions. The offshore flow is often moderate, creating glassy conditions in the morning. Expect some XXL days when the period hits 15s+. This is prime time for experienced surfers to score memorable sessions.
Average Spot conditions at Pennington Bay in July
Swell history for July
Wind history for July
Swell quality
Analyze the groundswell consistency at Pennington Bay during July. 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 July.
Ground swell
Ground swell by size
Wind conditions
Evaluate the wind and swell alignment at Pennington Bay for July. 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.