Capbreton seasonal overview
Best Surf Season (October - March)
As autumn deepens and the North Atlantic begins to spin up one low-pressure system after another, Capbreton transforms into a genuine European sandbar machine. The dominant swell window never leaves the WSW-to-NW quadrant, and from October through March the average wave height sits between 4ft and 6ft (1.2m and 1.8m) with periods mostly in the 11-13s range. These are powerful, long-period groundswells generated by intense extratropical cyclones moving across the North Atlantic and the Bay of Biscay. Combined with an increasing number of days of offshore-to-light easterly flow, the result is consistent, hollow, well-sequenced peaks on the sandbanks. This is the time to watch the charts, because when a deep low stalls near the Azores and a high builds to the north, Capbreton can serve up waves that are as good as anywhere in France.
Fair Surf Season (April - May & September)
The shoulder seasons are a compromise: there is still plenty of energy in the water, but the North Atlantic storm track starts to migrate north in spring and only slowly reawakens in September. April and May see the average swell size drop to 3-4ft (0.9-1.2m) and periods fall to the 10-11s range. September takes a similar step back from summer, with cleaner longer-period pulses as the first autumn lows begin to develop. The wind is less reliable, with ideal offshore days occurring only 20-30% of the time, but sandbar quality often remains high. Bring a groveling board for the smaller days and be ready to trade the wetsuit for extra flexibility-the water warms quickly in this period.
Low Surf Season (June - August)
Summer is the classic down period in the Bay of Biscay. During June, July and August the average swell height drops to around 3ft (0.9m), and the period averages only 9-9.4s. The dominant swell is mostly local NW windswell and background Atlantic pulses rather than powerful groundswell. The Azores High protects the coast from big storms, while daily northwesterly sea breezes often chop up the surface in the afternoon. Early morning glassy windows with light offshore east/southeast winds can turn the sandbanks into fun, rippable small waves-especially at high tide-but if you are chasing size or power, summer is not the season.