Stone Harbor - surf spot statistics

Best Surf Season (October - March)

The North Atlantic roars to life during the autumn and winter months, delivering the most consistent and powerful swell to Stone Harbor’s east-southeast-facing shoreline. As extratropical storms intensify along the US East Coast and the Gulf Stream, long-period groundswell from the O/OSO/SO/SSO quadrants becomes more frequent, with average wave heights climbing to the 0.7m range and periods occasionally stretching into the 10-14s sweet spot. The climatological increase in cold fronts sweeping across the Mid-Atlantic brings a higher frequency of offshore NW-NNW-WNW winds, cleaning up the lines and offering glassy conditions on the better days. While onshore E-SE winds still plague many swells, the winter months provide the highest chance of scoring punchy, rippable waves with offshore textures – this is the window to watch for pumping sessions.

Fair Surf Season (April - May & September)

Transitional months like April, May, and September offer a mixed bag at Stone Harbor. Spring sees the jet stream retreating and storm activity decreasing, resulting in smaller average swell heights (0.5-0.6m) and shorter periods (6-7s). However, occasional late-season nor’easters can still fire up fun-sized waves from the ESE-SE sector, and the increased frequency of west-to-northwest wind events provides clean, offshore conditions on the right days. September marks the return of hurricane season, bringing the potential for long-period, powerful E-SE swell, but often accompanied by onshore wind patterns. These months are best for the opportunistic surfer who can pounce on windows of light offshore flow and modest groundswell.

Low Surf Season (June - August)

The summer months at Stone Harbor are notoriously flat and wind-challenged. With average swell heights plummeting to a mere 0.4m and periods lingering in the 6-7s range, the wave quality suffers dramatically. The dominant swell comes from the SSE-SE quadrant (over 50% of the total), aligning directly with the onshore wind regime – southwest through southeast breezes dominate the summer wind rose, creating nothing but choppy, weak, and virtually unsurfable conditions. Ideal offshore wind (W-NW) blows less than 3% of the time. Unless a distant hurricane sends a rare pulse of long-period energy across the Atlantic, you’re better off saving your energy for the fall and winter. It’s a classic summer doldrums pattern for this exposed Jersey shore spot.

March: Spring Transition & Late-Season Nor'easters

March marks the beginning of the seasonal shift, but winter still has a few punches left. Average swell height remains at 0.7m with period improving slightly to 6.8s. The swell rose shows a growing presence from the E-ESE-SE sector (30% combined), driven by nor'easters that spin up along the coast. Unfortunately, these also come with onshore E-SE winds that dominate nearly 13% of the time, ruining the surf. Meanwhile, offshore winds from WNW-NW still blow strong (23% combined) and are responsible for the best conditions when a NW swell coincides. Ideal wind percentage ticks up to 6% – still low but an improvement over midwinter. The biggest issue is the short period (most swell under 8s) meaning waves lack power. However, an infrequent long-period groundswell (10-12s) can sneak through from the NE-ENE, wrapping into the beach with decent shape if the wind plays along.