Gruissan - surf spot statistics

Gruissan, France, is a surf spot with relatively modest conditions year-round, best suited for beginners or longboarders due to its generally small swell and frequent onshore winds. The best months for surfers are late autumn and winter, particularly from November to February, when ground swell contributions peak (20–24%) and mean swell size reaches around 1.0–1.1m. Wind conditions remain poor throughout the year, with good wind days rarely exceeding 18% (July), but winter months see slightly better consistency despite high bad wind percentages (88–90%). Spring and summer (May–August) are the least favorable, with minimal ground swell (4–12%), high no-swell days (48–60%), and smaller waves (0.5–0.7m). September and October offer a transitional period with improving swell but still inconsistent winds. Overall, Gruissan is not a high-performance surf destination, but winter provides the most rideable waves, albeit with challenging wind conditions. Surfers should prioritize late-season sessions when swell energy is marginally higher, though patience is required due to the spot's limitations.

May in Gruissan offers marginal surf conditions with an average swell height of 0.7m and a period of 5.7s, indicating generally small, weak waves. The best swells come from the NW and WNW, where wave heights occasionally reach overhead (1.5m+), but these are relatively rare (around 15% combined for 1.5m+ waves). Most waves are knee-high or smaller, with SE and ESE swells dominating the smaller end of the spectrum (0.5-1m). Wind conditions are challenging, with only 14% of days offering clean offshore or light cross-shore winds—typically from the N, NE, or E. Strong onshore winds from the NW and WNW are common (20+ kph in 40% of cases), creating choppy or blown-out conditions. For advanced surfers, patience and timing are key; late-season NW groundswells with lighter winds provide the best opportunities, but most sessions will be small and suited for longboarding or high-volume boards.