No other cruising ground in northern Europe packs this much into a fortnight. A Channel Islands and Brittany loop hands you duty-free Guernsey, the second-biggest tides on the planet at Saint-Malo, an archipelago of drying rock that turns into a different coast twice a day, and some of the best seafood you will eat afloat. It also asks more of a skipper than almost anywhere else in France, because here the tide is not a detail. It is the engine that drives every decision.
I cruised this loop from a south-coast English base, but it works equally well starting from the Channel Islands themselves or from Saint-Malo if you bring the boat down separately. The plan below runs roughly two weeks, clockwise, and every leg is timed to the tide rather than the clock. Read tidal streams for Brittany gates before you commit, because the springs here are ferocious.
The first days: into the islands
Most UK crews make landfall at Guernsey first. St Peter Port is a fine arrival: Guernsey VTS works VHF 12 and the Victoria Marina behind its sill carries about 4.2 metres over a cill that opens roughly 2.5 hours either side of high water, so time your run in. The town is steep, granite and full of chandlers, and the duty-free fuel and drink are a genuine bonus for a visiting boat. Guernsey sits outside the EU customs and VAT area, which is why the fuel is cheap, but it also means you clear in and out as you would crossing any frontier, so have the paperwork and crew details ready. The Russel and the Little Russel channels into St Peter Port carry strong streams, so time your approach to the tide as you would anywhere in these waters, and keep the listening watch on Guernsey VTS as you close the harbour.
From Guernsey the natural next hop is Jersey, around 30 nautical miles southeast, with the option to break at Sark or Herm. St Helier is the big harbour, locked and gated, with the marina inside a sill. Jersey feels more open and beach-fringed than Guernsey, and the tidal range here is enormous, so the foreshore you anchor off at high water becomes a desert of sand at low. Give yourself two or three days across the islands. They are worth it, and the weather will probably make the choice for you.
Crossing to Saint-Malo
From Jersey it is about 33 nautical miles to Saint-Malo, threading south past the Plateau des Minquiers, a vast drying reef that you keep well clear of. From St Peter Port direct the passage is nearer 54 nautical miles, leaving Sark to the east and skirting the Minquiers. Either way, time the arrival, because Saint-Malo sits at the head of one of the largest tidal ranges in the world, over 12 metres on a big spring, and the Bassin Vauban lock works to that rhythm.
Saint-Malo is the jewel of the loop. The Saint-Malo and Rance marina options put you within the walls of a corsair city rebuilt stone by stone after the war. Lock in, walk the ramparts, eat. If you have a spare day, take the boat up the dammed Rance towards Dinan, or read up on the slow cruise of the Rance and Cotes-d'Armor before you decide how far to push inland.
West along the Cotes-d'Armor
This is where the loop becomes pure Brittany. Heading west from Saint-Malo the coast turns to pink granite and rock-strewn channels. Plan the legs as tidal gates:
- Saint-Malo to Saint-Cast or Erquy, short hops along a drying coast.
- On to Saint-Quay-Portrieux, an all-tide marina that is a relief after a run of gated harbours.
- Up the Trieux river to the moorings below Ile de Brehat, the flower island, one of the prettiest anchorages in France. The Ile de Brehat and Trieux river passage threads between rocks and needs a rising tide and care.
- West to Perros-Guirec and the extraordinary Pink Granite Coast around Ploumanac'h, where the rocks look sculpted.
The pink granite coast sailing here is the photographic high point of the trip. Anchor off the boulders, time everything to the tide, and never trust a chart over your own eyes among the rocks.
Turning for home
How far west you push depends on your fortnight. Lannion bay and Trebeurden make a natural turning point, or you carry on to the Bay of Morlaix and Roscoff if time allows. From your westernmost port you reverse the route, or strike north back across to the Channel Islands and home.
The smart move on the return is to break the long Channel hop at Guernsey again, refuel duty-free, and stage the final crossing on a settled forecast. A general north Brittany cruising guide is worth keeping aboard for the alternatives, because in this weather you will change the plan more than once.
Hard numbers and survival rules
A few facts that keep this loop safe:
- Tidal range: over 12 metres at Saint-Malo on big springs, among the largest in the world. Your depth sounder reading at high water means nothing six hours later.
- Distances: roughly 30 nautical miles Guernsey to Jersey, 33 Jersey to Saint-Malo, 54 St Peter Port direct to Saint-Malo.
- VHF: Guernsey VTS on 12, French marinas almost universally on 09, and a listening watch on 16 throughout.
- Sills and locks: St Peter Port, St Helier and Saint-Malo are all gated or silled. Carry the tide tables and a backup plan for every arrival.
What it costs and when to go
This is not an expensive cruise by French standards. The Channel Islands charge moderate marina rates, with Victoria Marina in St Peter Port and St Helier both reasonable for a 12-metre boat, and the duty-free fuel and drink in Guernsey claw some of it back. The Breton marinas are cheaper still, often 25 to 40 euros a night in high season, and the anchorages off Brehat or in the pink granite bays cost nothing. Provisioning is good in Saint-Malo, Saint-Quay and Perros-Guirec, thinner on Brehat and the smaller harbours, so stock up in the towns.
Season matters here more than on a tideless coast. June to early September gives the best chance of settled weather and warm enough water to swim, though the sea this far north never gets truly warm. Avoid big spring tides for your first attempts at the gated harbours, because the streams run hardest then and the timing windows are tightest. Neaps are kinder to a newcomer learning to read the gates. The weather is the real variable: a Biscay depression can shut the whole coast down for two or three days, so a fortnight with no slack in it is asking for disappointment.
Skills this loop demands
If you have only cruised the Mediterranean or a small-range coast, this fortnight is a step up. The drying heights are enormous, the rocks are everywhere, and the streams can run faster than a cruising yacht motors. The single most useful habit is to plan every leg backwards from the tidal gate at the far end, then check that the gate at the near end lets you out in time to catch it. Carry a tidal atlas, trust your eyes over the chart among the rocks, and never assume your high-water depth reading will still be there on the way out. Get into that rhythm and the coast rewards you.
Two weeks is enough to do this loop properly only if you treat the tide as the boss. Plan each leg around the gate, build in a weather day or two, and the Channel Islands and Brittany will give you the most varied fortnight's cruising in France. Rush it, and the rocks and the range will teach you patience the hard way.
