Port Mary • Surf Spot Statistics

Best Surf Season (October - March)

Port Mary is a southwest-facing stretch of the North American coastline that lives for the Atlantic storm track. From October through March, recurring extratropical cyclones rolling up the coast pump a steady diet of S, SSW, SW and WSW swell into the beach. Average surf heights sit in the 8.2-9.8ft (2.5-3.0m) range, periods push 10.4-11.8s, and ideal N/NE/ENE offshore winds blow between 28 and 37 percent of the time. The NAO is a useful guide here: negative phases often favor colder, more active storm tracks near the East Coast, while positive phases can shift the action farther north. It is cold, difficult and raw, but this is when Port Mary produces its heaviest, most powerful waves.

Fair Surf Season (April & September)

April and September are the transition windows. April still averages a solid 7.2ft (2.2m) with the highest ideal-wind score of the year at 38 percent, but the period drops to 10.8s and the consistency begins to fade. September sees the Atlantic starting to stir again, with an average 6.6ft (2.0m) and more frequent S/SSW/SW/WSW pulses, though onshore SSE/S winds and a 9.9s period keep it a notch below winter form. Both months reward patience with clean, head-high sessions.

Low Surf Season (May - August)

The heart of summer is the slow season. From May to August the average swell falls to 4.3-5.6ft (1.3-1.7m), periods shorten to 9.8-10.2s, and ideal offshore wind days drop to just 20-31 percent. The S-SSW-SW-WSW swell window remains extremely well represented, but most of that energy is small, and afternoon sea breezes from the SSE/S/SW often chop up the surface. Expect fun-sized, groveling conditions with occasional clean windows when high pressure and light offshore flow line up.