Manasquan Inlet - surf spot statistics

Manasquan Inlet is a surf spot largely dominated by wind swells, with ground swells being relatively rare. The best months for surfing here are typically late summer and early fall, specifically from **August to October**, when ground swell activity increases slightly and wind conditions improve marginally. September stands out with 20% ground swell occurrence—the highest of the year—alongside reduced no-swell days (19%) and a mean swell size of 0.8m, offering more consistent rideable waves. While wind conditions remain suboptimal (71% bad winds even in September), this period still provides the best balance between swell energy and surfable days. Winter and early spring (November to March) bring choppier conditions due to strong onshore winds (bad wind conditions exceeding 80%) and smaller, wind-driven swells. Summer months (May to July) see a drop in swell size (0.6-0.8m) and persistent bad wind conditions (70-73%), though June and July offer slightly better wind windows (30-31% favorable winds). Overall, surfers can expect the most reliable sessions in late summer and early fall, but must contend with generally poor wind alignment year-round. The spot favors those comfortable with wind swell surf, as clean conditions are rare.

Manasquan Inlet in September typically offers manageable but somewhat inconsistent surf conditions for intermediate to advanced surfers. The average swell height is 0.8m with a decent period of 9.0s, suggesting mostly small to medium waves with occasional clean, rideable shoulders. The predominant swell direction is from the ESE and SE, contributing to 38.5% of waves in the 0.5-1.5m range, which is ideal for fun, playful surf when combined with the right wind. However, nearly 50% of waves fall below 0.5m, indicating frequent flat spells or weak conditions. Wind is favorable (light offshore or sideshore) only 29% of the time, with the most common onshore breezes coming from the S to SW directions, which can create choppy or mushy waves. The spot handles larger swells (1.5m+) poorly due to the limited exposure to pure easterly energy, so bigger days are rare (only ~5% of the time). For best sessions, watch for ENE-ESE swells paired with NW-W winds to clean up the lineup. Overall, expect mostly small, wind-affected surf but with the occasional glassy, waist-high peak—patience and timing are key.