The anchor alarm on my phone is an ugly, jarring noise, and I have never been more grateful for an ugly noise than at 0240 in a bay near Cap Ferrat, when it tore me out of my bunk to tell me the boat had moved 60 metres from where she had been at midnight. There was a Mistral building, the bay was packed with summer boats swinging on short scope, and somewhere astern of me in the dark was a 50-foot motor cruiser I very much did not want to meet. Dragging anchor at night, in a crowded Riviera anchorage, is one of the more heart-stopping things that happens to a cruising sailor, and it happens far more on this coast than people admit.
The Mediterranean lulls you. The tide barely moves, often less than 30 centimetres, so you stop thinking about depth changes, and the bottom in many pretty bays is weed or thin sand over rock, which holds poorly. Then the wind that this coast is famous for arrives, and Mistral gusts that average over 40 knots in the Gulf of Lion, with violent squalls funnelling down the valleys, find every badly set anchor in the bay at once.
React first, diagnose second
When the alarm goes, or when you wake with that wrong feeling and the boat lying at an odd angle, get on deck immediately and start the engine. You do not stand in the companionway debating whether the alarm is a false alert. Engine on, in neutral, warming, while you work out what is happening. A running engine is the difference between a boat you can drive clear and a boat at the mercy of the wind.
Then look. Two things matter in the first thirty seconds: where am I going, and what is in the way. Transit a light ashore against a fixed mark and watch it for ten seconds. If it is sliding, you are moving. Look astern and downwind, because that is where you will end up, and find the boats, the rocks, or the moored craft that lie in your path. On a black night with a chop building this is hard, which is exactly why an anchor alarm earns its place: it wakes you while you still have room to act, not after the crunch.
Drive, do not just re-anchor in a panic
If you are dragging towards another boat or a hazard, use the engine now to take the load off the anchor and steer yourself away from the danger, motoring gently up towards your anchor or across the wind to open water. The aim in the first minute is not to reset the hook, it is to stop becoming a collision. Buy yourself sea room first.
Only once you are clear and not threatening anyone do you deal with the anchor. Recovering and resetting at night, in wind, single or short-handed, is genuinely difficult, so be methodical. Motor up over the anchor as crew recovers chain, get it clean and aboard or hanging clear, and motor to a spot with room around you. Do not try to drop again right on top of the boats you just escaped.
Resetting in the dark
When you re-anchor at night in a Riviera bay, give yourself more margin than you would in daylight:
- Pick water deep enough and clear enough that your swing, in the new and likely stronger wind, will not foul anyone. In a crowded bay this often means moving to the edge or out altogether.
- Pay out generous scope. The rule of thumb of 5:1 on chain is a minimum at the high end of the range, and in rising wind more is better. Short scope is the single commonest reason boats drag on this coast.
- Set the anchor properly: let it settle, then back down hard with the engine in astern until the boat stops and the chain comes up taut, and watch a transit to confirm it is holding before you trust it.
- Reset the anchor alarm with a sensible radius and leave an anchor watch on if the wind is serious. In a real Mistral, somebody stays awake.
The seagrass complication
There is a legal layer here that visitors miss. Much of the Cote d'Azur seabed is Posidonia seagrass, a protected habitat, and since 2016 anchoring over it has been progressively restricted and in many zones banned outright, with real fines. Posidonia is also miserable to anchor in, the anchor skates over the leaves and will not bite, which is half of why boats drag here. So when you reset, you want clean sand, both for holding and to stay legal. The detail of where you can and cannot drop is covered in the guide to Cote d'Azur anchoring rules, and it is genuinely worth knowing before you arrive, not after a gendarme maritime knocks on the hull.
When it is more than you can handle
Most night-time drags end with the skipper sweating, resetting, and lying awake for an hour. But occasionally it tips into an emergency: you cannot recover the anchor, you are being driven onto rocks, another boat has dragged down onto you and fouled your gear, or someone gets hurt on the foredeck in the dark. That is when you stop trying to fix it alone and call for help. This coast falls under CROSS La Garde, near Toulon, which covers the French Mediterranean, and you reach the coastguard on VHF channel 16 or by dialling 196, free, at any hour. The structure of who answers where is set out in the overview of the French coastguard and CROSS, and if the situation is developing fast, the grades of call, urgency versus distress, are in the French distress and safety call procedure.
If a tow becomes necessary, remember the French model: the SNSM volunteer lifeboats save life for free but invoice for recovering an undamaged boat, with rates climbing into the hundreds of euros an hour. Far cheaper, and far less embarrassing, to set the anchor properly the first time.
Why this coast drags boats
It is worth understanding why the Riviera punishes ground tackle so often, because the reasons tell you how to anchor better. Three things conspire. First, the holding is frequently poor: pretty bays are floored with weed, thin sand over slab rock, or protected Posidonia, none of which lets an anchor dig in properly. Second, the wind arrives suddenly and hard. The Mistral, by Meteo-France's own definition, is a northwesterly producing gusts over 32 knots that persists for at least six consecutive hours, and in the Gulf of Lion sustained speeds routinely top 40 knots with squalls far higher. A bay that was a millpond at sunset can be whipped into whitecaps by 0200. Third, because the tidal range is negligible, boats anchor on short scope without thinking, and short scope plus a 40-knot gust over weed is exactly the recipe for a 0240 alarm.
Knowing all that, the defensive moves are obvious in hindsight: anchor on clean sand even if it means a longer dinghy ride ashore, lay more chain than the calm conditions seem to need, set hard, and keep a real anchor watch when a Mistral is forecast. The forecast is the cheapest insurance of all, because a Mistral rarely arrives unannounced. Meteo-France issues warnings well ahead, and an evening spent reading the bulletin is an evening you will not spend on the foredeck in your underwear at three in the morning.
Sleeping easier
Cap Ferrat that night ended well. I drove clear of the motor cruiser with a few metres to spare, motored out to the windward edge of the bay where there was room and a patch of clean sand, laid out a good 6:1 of chain, backed down until she was rock solid, and sat in the cockpit with a coffee until the worst of the Mistral passed at dawn. The anchor alarm did its job, and so did the discipline of acting before diagnosing. On this coast the wind will test your ground tackle eventually. The boats that come through it are the ones that set well, scope generously, and treat a dragging anchor at night as a drill they have already rehearsed in their heads.
