Gibraltar is the gate. For a lot of cruisers heading off on a bigger voyage, whether that is the Canaries and the trade-wind route west, or the Mediterranean in reverse, the Rock is the milestone that says the planning is done and the trip has begun. The question is how you get there from France, and the honest answer is that there are two completely different routes, and the right one depends on which coast of France you started from.
I have done both, a few years apart. Here is how I would plan each.
Two routes, one destination
There is no single France to Gibraltar passage. There are two:
- The Atlantic route, down the west coast of France, across or around the Bay of Biscay, along Portugal, and round Cape St Vincent to the Strait.
- The Mediterranean route, west along the Spanish costas from the Gulf of Lion, to Gibraltar from the east.
If your boat is on the Atlantic coast, you go down the outside. If it is in the Med, you go along the inside. The interesting case is a boat sitting in northern France or the Channel that has a genuine choice, and that choice usually comes down to whether you want to cross France by canal or sail round Brittany and Biscay. I have laid out that specific decision in canals versus Biscay, two ways south through France, and it is worth reading before you commit, because it shapes the entire passage.
The Atlantic route: the long way with the open sea
From the Loire or La Rochelle area, the Atlantic run to Gibraltar breaks into recognisable chunks. The Bay of Biscay crossing to the north coast of Spain is the first and most serious; the direct hop from southern Brittany or the Vendee to A Coruna is roughly 330 to 400 nautical miles, a passage of three to four days for a typical cruising boat. That open-water leg deserves its reputation, and I would not start it without reading crossing the Bay of Biscay in a small boat and waiting for a proper window.
After Biscay the route hugs the coast. From A Coruna it is about 170 nautical miles down to the Portuguese border, then a string of Portuguese harbours leads south. The whole Portuguese coast is roughly 300 nautical miles, and most crews day-hop it or do short overnights, breaking the journey at Leixoes, Cascais, Sines and Lagos. The France to Portugal in stages breakdown lists the harbours and the typical leg distances.
The last act is rounding Cape St Vincent, the south-west corner of Iberia, and turning east along the Algarve to the Strait. From Lagos to Gibraltar is about 170 nautical miles. The defining feature of this whole coast is the Portuguese trades, the northerly winds that blow down the coast through summer, often 15 to 25 knots, which means the Atlantic route south is mostly a downwind run. Going the other way is hard work; going south you are usually flying.
The Mediterranean route: along the costas
If your boat is in the Med, the run to Gibraltar starts with the Gulf of Lion, the stretch of water off the Languedoc coast that is the most weather-sensitive part of the whole trip. The mistral and the tramontane both blow offshore here and can build a vicious sea over a short fetch. From the Gulf of Lion across to the Spanish Costa Brava is around 100 to 130 nautical miles depending on your departure point, and you want a settled window for it. The Gulf of Lion weather trap piece explains why this innocuous-looking patch of sea catches people out year after year.
Once across, the Spanish Mediterranean coast is a long, harbour-rich daysail south and west: Costa Brava, Costa Dorada past Barcelona, the Costa Blanca, then the long run along the Costa del Sol to Gibraltar. The total distance from the French border to Gibraltar along this coast is roughly 600 nautical miles. The summer weather is generally kinder than the Atlantic, with light sea breezes and frequent calms, which means you will motor a great deal. Carry fuel and patience.
The sting in the tail is the Strait of Gibraltar itself. The current sets east, into the Med, almost permanently, typically 1 to 3 knots, because the Med evaporates faster than its rivers refill it. Coming from the east you have it behind you, which is a gift; the Atlantic-route boats arriving from the west have to fight it and time their approach to the tide. Either way the Strait is a major shipping lane with a traffic separation scheme, and you cross or transit it with full attention.
Timing the whole thing
The seasons pull the two routes in slightly different directions.
- Atlantic route: aim to cross Biscay between June and early September, when the depression track is furthest north. The Portuguese trades are most reliable in midsummer. Arriving at Gibraltar by September sets you up for the November Atlantic crossing season if you are continuing to the Canaries.
- Mediterranean route: May, June and September are best, avoiding both the peak August crowds and the worst of the mistral, which is statistically more frequent in winter and spring but can blow any time.
A boat aiming for a transatlantic departure often plans the whole France to Gibraltar leg around arriving with weeks to spare for provisioning and final jobs. If that is you, the wintering in France before a spring Atlantic crossing approach is worth considering: sit out the winter somewhere cheap and well-found in France, then make the run south fresh in spring.
Numbers to budget
A few figures to anchor your planning, current for 2025-2026:
- Gibraltar marina berthing for a 12 metre boat runs roughly 30 to 50 euros a night, cheaper than most of the French Med and a relief after the Riviera.
- Fuel in Gibraltar is duty-free and noticeably cheaper than France or Spain, which is why arriving crews fill every tank and jerry can before pushing on.
- The Strait current of 1 to 3 knots east-setting can add or subtract the best part of a day over a slow passage, so factor it into your ETA, not as an afterthought.
- Biscay direct from France is 330 to 400 nautical miles; the Med costas run is around 600 nautical miles. Plan provisions and watch systems accordingly.
Paperwork that travels with you
A long leg south crosses borders, and the admin does not stop at the French coast just because you have left it behind. If your boat is non-EU flagged, the 18-month temporary admission rule for non-EU boats governs how long you can keep her in EU waters without paying VAT, and that clock does not reset simply because you have sailed from France into Spanish or Portuguese waters; it is an EU-wide allowance. Plan the route so you are not accidentally overstaying it halfway down Portugal.
Crew passports matter too. The Schengen area runs from France through Spain and into Portugal as a single zone, so the Schengen 90/180 day rule for boaters keeps counting your days across all of them. Gibraltar, usefully, is not in Schengen, so checking in there can reset crew thinking and give non-EU sailors a place to step outside the area for a spell. We arrived at the Rock with a careful tally of everyone's days and were glad of it, because the immigration questions at the marina office were real and not a formality.
Carry the boat's documents in an accessible folder for the whole trip: registration, insurance, a crew list and VAT evidence. The same paperwork the Gendarmerie Maritime checks in France is what the Spanish Guardia Civil and the Portuguese authorities want to see, and a tidy folder turns a boarding into a five-minute chat rather than an afternoon.
The real decision
Whether you go outside or inside is rarely a free choice; your starting harbour usually makes it for you. The boats with a genuine fork in the road are those in the Channel and the north, and for them the canals-versus-Biscay call is the one that matters. Get that right, and the long leg south to Gibraltar becomes a series of manageable passages rather than one intimidating voyage. The Rock has waited a long time. It will wait for a decent weather window too.
