There are two ways to deal with the Bay of Biscay. You can cut straight across it on a long offshore passage, or you can creep down the French coast hugging the shore until you run out of France at Hendaye. This piece is about the second option dressed up as the first: a week that uses the southern French Atlantic coast as the run-up to a Spanish-border crossing, so you arrive fit, rested and able to pick your moment rather than committing cold from La Rochelle.
I have done the big offshore version, La Rochelle direct to Gijon, and it is a real passage: around 260 nautical miles, roughly 44 hours at 6 knots, two nights at sea. But the first time I went south I did not feel ready for that, so I coast-hopped to the border and crossed the short way. Here is how that biscay crossing border week unfolded.
Why coast-hop at all
The honest reason is weather, and the slightly less honest reason is nerves. Biscay has a fearsome reputation, most of it earned in winter and in the autumn equinoctial gales. In a settled June or July spell a force 9 is genuinely rare, which is exactly why the recognised window for crossing is May to August. By working down the coast you keep escape ports within reach the whole way and only commit to open water for the final, shorter leg.
If you are weighing the long offshore route against the inshore creep, the broader piece on crossing the Bay of Biscay in a small boat lays out both honestly, and I would read it before deciding which version of this week suits your boat and crew.
La Rochelle: the obvious start line
La Rochelle is the natural jumping-off point. It is a superb sailing town with three marinas, every chandler and sailmaker you could want, and the best concentration of weather forecasting and routing services on the coast. It is the place to sit, provision and wait for your window with confidence. The Minimes marina alone holds around 3,500 berths, so finding a visitor spot is rarely the drama it is further south.
Spend a day here getting your forecasts straight. Biscay weather hinges on where the Azores High sits relative to any low over Iberia, and the picture can shift fast, so do not trust a forecast more than about 48 hours out. While you are at it, make sure your paperwork is in order: post-Brexit, UK boats need to mind the schengen 90/180 day rule for boaters, and the days you have already spent in France count.
La Rochelle south to the Gironde
The first leg runs south past the Pertuis Charentais, the channels between the Ile de Re and Ile d'Oleron, towards the great mouth of the Gironde. This is shallow, tidal water with sandbanks that shift, and the Gironde entrance in particular demands respect: the Grande Passe can build a steep sea on the ebb against any swell. Time it for the flood and read up on crossing a sandbar safely before you attempt the bar in fresh weather.
Royan, just inside the estuary, is a comfortable overnight stop with an all-tide marina. From here the coast turns into the long, harbourless Landes shore, kilometre after kilometre of surf-pounded beach with almost nowhere to put in. The only refuge of note is Capbreton, an engineered harbour entrance that should not be attempted in any onshore swell.
The harbourless gap and the Basque country
That harbourless Landes stretch is the planning problem of the week. From the Gironde to Capbreton is the better part of 70 nautical miles with no reliable bolthole, so you treat it as a single committed daylight passage and you do not start it on a marginal forecast. The Atlantic swell here rolls in unimpeded, and the difference between this and the gentle Med is something every first-timer underestimates. The contrast is laid out well in the piece comparing Atlantic swell with the Mediterranean.
Past Capbreton the coast finally gets interesting again. The French Basque country, Biarritz, Saint-Jean-de-Luz and Hendaye, gives you proper hills, surf beaches and a culture that already feels half Spanish. The harbour at the french basque coast around Hendaye and Saint-Jean-de-Luz is the last in France, and Saint-Jean-de-Luz sits in a sheltered bay that is one of the few genuinely protected anchorages on the whole southern shore.
Hendaye: the frontier
Hendaye is the border. Across the Bidasoa river is Hondarribia in Spain, close enough to dinghy. Hendaye marina is large, modern and a good place to make final preparations, water up and rest before crossing into Spain or, if you have the appetite, launching the longer offshore leg towards the north Spanish ports.
For an EU-internal move into Spain there is no longer a routine manned customs visit required, but carry your registration, insurance, radio licence and crew passports. If you are a non-EU boat, the clock on the 18-month temporary admission rule for non-EU boats keeps ticking regardless of which side of the Bidasoa you are on, so know where you stand.
Preparing the boat and the crew
A coast-hopping week is gentler than a two-night offshore plunge, but the Landes gap and the Gironde bar still mean real open-water passages, and you prepare for them properly. Before we left La Rochelle I went over the boat as if for an offshore leg: seacocks checked, steering and rudder inspected, jackstays rigged, storm canvas accessible, and the bilge bone dry so I would notice any new water at once. The engine is your insurance on this coast, because the calms are long and the swell does not stop, so I changed the fuel filter and carried spares.
Crew matters as much as kit. Even the short border crossing can mean several hours of Atlantic motion, and a green crew member is no fun and no use. Biscay swell is a different animal from the Med chop, and people who never feel ill in sheltered water can struggle here. We sort out medication the day before rather than when it is already too late, and the rundown on managing seasickness on a Biscay crossing is worth handing to anyone aboard who has not crossed open water before. A rested, fed, unafraid crew is the single biggest safety factor on this trip.
What the week actually demands
This is not a gentle coastal amble. It is a few short hops bracketing two long committed passages, the Landes gap and the Gironde bar, with the open Atlantic as the backdrop the whole way. The things that mattered most:
- Pick the window, not the date. We waited two extra days in La Rochelle and crossed the Landes in a flat calm. Worth every hour.
- Respect the swell even in light wind. A 2-metre Atlantic swell with no wind still makes a harbour entrance dangerous.
- Keep fuel high. The wind on this coast is feast or famine, and you will motor the calms.
One more thing worth saying about this stretch: it is tidal at the top and barely tidal at the bottom, and that transition catches people out. Up around the Pertuis Charentais and the Gironde you are firmly in big Atlantic tides, with strong streams that you plan your passages around and bars that turn dangerous on the ebb. By the time you reach the Basque coast the range has dropped right off, and Hendaye feels almost Mediterranean by comparison. The skill is remembering that the tide still matters most exactly where the coast is most exposed, at the Gironde and across the harbourless middle, and easing off the tidal arithmetic only once you are safely south.
If after all this you fancy the real thing, the proper offshore plunge across the bay, then the next step is the detailed biscay passage planning guide, which is what I read before finally cutting the corner direct to Spain the following season. Either way, the southern French coast is the right place to learn the bay's temper before you trust it with two nights of open water.
