Gruissan - surf spot statistics

Best Surf Season (November - February)

The heart of winter brings the most consistent action to Gruissan. As the Mediterranean churns under the influence of strong Mistral events, NW and WNW windswell becomes dominant, delivering punchy, rideable waves in the 1-1.5m range with periods averaging 5-5.5s. The offshore wind component is highest during these months, with ideal wind (W to NNW) blowing 21-26% of the time, ensuring clean faces and peaky conditions on the sandbars. While long period groundswell is rare, the reliable short-period swell coupled with favorable wind windows makes this the premium window for Gruissan.

Fair Surf Season (March, April, October)

Shoulder months see a transition. October benefits from the early-season storm track, offering similar swell heights to winter but with slightly less consistent offshore wind (20% ideal). March and April still see solid NW windswell, but the average wave height drops to 0.9-1.0m and the winds become more variable, especially with increasing sea breezes from the S/SE that can spoil afternoon sessions. The swell period remains short, and you'll need to pick your days carefully.

Low Surf Season (May - September)

The arrival of summer brings a dramatic shutdown. The Mediterranean settles into a typical anticyclonic pattern, dominated by thermal low pressure and sea breezes. Wave heights plummet to 0.6-0.7m on average, with periods dropping below 4.5s, often too small and choppy for a decent wave. The wind regime shifts towards more onshore directions (E to SSE) as the prevailing winds become more easterly. Ideal offshore wind drops to 12-15%, making clean, rideable swell a rare commodity. Unless a late-season storm or a weak frontal passage graces the region, Gruissan is best left to the flat spells and summer sup.

November: Winter Kicks In

November roars back to life with an average swell height of 1.1m and period of 5.4s, matching the winter peak. Swell direction is strongly NW (20.0%) and WNW (12.9%), plus significant ESE swell (12.0%) from distant storms. The NW swell delivers solid size: 1.5-2m (5.2%) and 2-2.5m (3.4%). Ideal wind occurs 25% of the time, with WNW (38.1%) and NW (12.3%) dominating the wind rose. The increased frequency of low-pressure systems over Europe drives powerful Mistral events that groom the windswell into clean, rippable lines. November is arguably the best month, combining the highest wave heights with favorable offshore winds. Expect fun, rideable conditions on many days, with occasional pumping sessions when the stars align.