Pennington Bay - surf spot statistics

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.

April: Autumn Gold – Consistency Meets Clean Winds

April is the real turning point. Average swell height sits at 1.7m, but the period jumps to 12.1s, signaling more powerful groundswell. The core energy comes from SSW (37.3%) and SW (32.8%), wrapping perfectly into the bay. The wind story brightens: offshore flow from the north (6.5%) and NNW (3.6%) becomes more common, and the overall ideal wind percentage climbs to 23%. The SE wind drops below 13%. This creates a much better quality-to-quantity ratio. Expect fun to solid waves with clean conditions on many days. The ocean is waking up.