A sea kayak does something a paddleboard and a dinghy cannot. It is fast enough to cover real distance, low enough to slide into a cave the swell would smash a tender against, and quiet enough that a grey seal will surface a paddle length away and stare at you before sinking back down. We carry a folding double on the coachroof through the Brittany season, and the days I remember most clearly from north Brittany are not the passages. They are the mornings we left the boat at anchor and went looking at the coast at sea level.
This is a sport that rewards the visiting cruiser more in Brittany than almost anywhere, because the coast here is built for it: granite, caves, islets, and a tidal range that exposes a different shoreline twice a day.
Where the caves are: Crozon
If you want one reason to put a kayak on your boat for a Brittany cruise, it is the Crozon peninsula. The cliffs between Morgat and Cap de la Chevre hold the largest concentration of sea caves in France, something like 446 of them, and a kayak is the only sensible way to enter them. Some run back fifty metres into the rock, the light going green then blue then black, the swell breathing in and out around you.
You do not need your own boat to try it. The Centre Nautique de Crozon-Morgat runs guided cave excursions along the cliffs in July and August from around 23 euros, taking paddlers from age eight, and self-hire of a sea kayak at Morgat runs about 25 euros for three hours. If you are anchored in the bay of Morgat with your own kayak aboard, you can do the same trip for nothing but effort, on your own timing, before the day boats arrive. The wider cruising guide to that stretch sits in camaret crozon peninsula, which covers the anchorages you would launch from.
Go on a calm morning. Caves and swell do not mix, and a kayak pinned against a cave wall by a surge is a genuine emergency. If there is any Atlantic groundswell running, admire the caves from outside.
Morlaix bay and the seals
Further east, the bay of Morlaix is a scatter of islets and drying sand, and it holds a colony of grey seals. Paddle quietly from a boat anchored off Carantec or near the Chateau du Taureau and you stand a real chance of meeting them, the curious young ones following the kayak. Keep your distance, let them come to you, and never paddle between a seal and the water. The wider wildlife of the Brittany islands, gannets and seals both, is worth the detour, and the seabird spectacle a little further west is covered in sept iles gannets by boat.
Morlaix bay is also a tidal masterclass. The range here can exceed 8 metres on a big spring, which means the bay you paddle out across at high water is a maze of drying sandbanks three hours later. Land your kayak on a bank at high tide and dawdle, and you can find yourself carrying it half a mile across mud to reach water again. Read the tide before you launch, every single time.
Reading the tide before you launch
This is the part that catches Mediterranean sailors and inland-waterway crews completely off guard. In Brittany the tide is not a detail, it is the dominant force, and a kayak feels it more than a yacht does because the kayak moves at the same speed as the stream.
A spring ebb pouring out of an estuary or around a headland can run at 2 to 3 knots, which is faster than most people paddle for any length of time. Paddle out on the last of the flood and you fight your way home against the ebb, exhausted. Plan the opposite: go out against the weaker stream, come home with the strong one helping you. The thinking is identical to planning a yacht passage through a tidal gate, and if the concept is new, the worked explanation in brittany tides for mediterranean sailors is the place to start before you put a paddle in the water here.
Wind over tide builds steep, breaking water fast in these channels. A 15 knot breeze against a 2 knot ebb can turn a flat channel into a kayak-swamping chop in minutes. When wind and tide oppose, stay close to the boat.
Getting the kayak off the boat
A folding or inflatable kayak is the realistic choice for a cruising yacht. A hard sea kayak is a wonderful thing and a nightmare to stow; unless you have deck space and dedicated cradles, fold or inflate.
Launch off the swim platform with the kayak alongside and parallel, stern to the ladder. Get in low, keep three points of contact, settle your weight before you let go of the boat. Re-boarding the yacht from a kayak is harder than it looks in any chop, so practise it once in calm water with a swimmer standing by, before you need it for real.
Carry the kit the rules expect. Once you leave the immediate inshore band a sea kayak falls under the French small-craft safety regime, which means a means of calling for help, a tow line, and a way to signal. A waterproof pouch with a phone or a handheld VHF on a lanyard, a whistle on the buoyancy aid, a spare layer in a dry bag. Always wear the buoyancy aid; north Brittany water sits around 14 to 16 degrees even in August, cold enough that a capsize without flotation is dangerous within minutes.
Carrying it on the boat, and stowing it wet
The stowage problem is the real reason most cruisers talk themselves out of a kayak and then regret it. A hard 16 foot sea kayak needs deck cradles, a clear run along the side deck, and lashing points that will hold it through a lumpy passage, which most production yachts simply do not have. The folding and inflatable boats solve this. A good folding double packs into two holdalls that live in a cockpit locker or under a quarter-berth, and a modern drop-stitch inflatable inflates to a stiffness that genuinely paddles, then rolls down to a bag the size of a large rucksack.
The price of that convenience is assembly time and maintenance. A folding kayak takes fifteen to twenty minutes to build the first few times, less once you know it, which is enough friction that you only do it when the day is right, which is no bad thing. The maintenance rule is the one that catches everyone: salt water and a hot locker breed mould and corrosion fast. Rinse the boat and the spray-deck in fresh water when you have it, dry everything before it goes back in the bag, and check the folding frame's joints and the inflatable's valves at the start of each season. A kayak left wet and rolled for a fortnight comes out smelling like a rock pool and stays that way.
Stow the paddles split and bagged, the buoyancy aids hung to dry rather than stuffed damp, and keep the pump where you can reach it without unpacking the forepeak. The crews who use their kayak most are the ones who have made it a five-minute job to get on the water, not a half-hour archaeological dig.
A wider canvas than you think
Once you are comfortable, the whole granite coast opens up. The Pink Granite Coast around Ploumanac'h is otherworldly from a kayak, threading between boulders the size of houses. The Trieux river and the approaches to Brehat are sheltered and gorgeous on a rising tide. South Brittany trades the drama for calm: the Glenan archipelago and the Gulf of Morbihan are flat-water paradise, and the Morbihan in particular, covered in gulf of morbihan by boat, is a place you can paddle for days between islets on a forgiving tide.
The pattern that works is always the same. Anchor the yacht somewhere sheltered, watch the forecast for a calm window, check the tidal stream, launch into the wind, and give yourself a margin to get home tired. Do that and a sea kayak gives you the French coast at a scale and a silence no other craft can match.
