Boat Noises at Night: What Woke These Sailors Up?

Ceyda Keskin

8 hours ago

3 min read

Sleeping on a boat comes with its own soundtrack.

Wind in the rigging. Water against the hull. Lines moving. Something rolling around somewhere you were absolutely sure you had secured.

Boat noises at night can be harmless, annoying, worrying — and occasionally much stranger than expected.

For the latest Sailoscope Asks, I wanted to know:

What’s the most ridiculous thing that has ever woken you up at night on a boat?

The answers included halyards, squeaking fenders, an anchor alarm, a flying fish…

…and two people trying to steal a marina pilot boat.

So apparently, sometimes getting out of bed really is necessary.

The Classic: Halyards Hitting the Mast

This one came up more than once.

A loose halyard tapping against an aluminium mast can sound surprisingly dramatic at night, especially when everything else is quiet.

One answer described a neighbouring boat leaving a halyard loose, with the clip beating rhythmically against the mast. From inside another boat, it sounded like someone — or something — tapping on the cabin roof.

I know this one very well.

During my first months living aboard, almost every halyard or line hitting a mast was enough to make me get up and check what was happening.

At the beginning, every strange noise sounds important.

Eventually you learn that sometimes the terrifying noise outside is simply someone else’s halyard.

Which is comforting.

And also slightly annoying.

Sailoscope Asks about strange boat noises at night

The Fender That Would Not Stop Squeaking

Another very boat-specific night-time problem is a rubber fender rubbing against the hull or pontoon as the boat moves in a small swell.

Squeak.

Pause.

Squeak.

Pause.

Nothing is wrong. Nothing needs fixing immediately.

And yet once you hear it, it becomes almost impossible not to hear it.

There are probably few things more impressive than how something so harmless can sound so enormous at two in the morning.

The Anchor Alarm

Then there is a sound nobody at anchor wants to ignore.

The anchor drag alarm.

The wind shifts or increases, the GPS alarm suddenly goes off, and you go from asleep to fully awake in about half a second.

Is the boat simply swinging around the anchor?

Or are you quietly travelling across the bay without meaning to?

Boats naturally move as the wind and current change, which is one reason understanding why boats swing at anchor becomes very useful once you start spending nights away from a marina.

But when that alarm goes off, going back to sleep without checking is really not an option.

Thankfully, sometimes the boat is exactly where it should be.

Sometimes the Noise Really Is Something Serious

One answer was in a completely different category.

Two thieves were trying to steal the pilot boat from the marina.

That is considerably harder to blame on a loose halyard.

Most of the time, waking up to a strange sound on a boat ends with:

“Oh. It’s just the fender.”

Or:

“Oh. Someone forgot to secure a line.”

Apparently, occasionally the answer is:

“No, someone is actually stealing a boat.”

Which does make all those unnecessary night-time checks feel slightly more reasonable.

And Then There Was the Flying Fish

One of my favourite answers involved a confused, slimy flying fish.

Imagine waking up because something has suddenly arrived on deck.

Not a broken line.

Not an anchor alarm.

Not another boat.

A fish.

There are plenty of things you can prepare yourself for before spending the night aboard.

I am not sure “unexpected flying fish visitor” is usually on the list.

Boat Noises at Night You Learn to Recognise

The funny thing about these answers is how quickly you start recognising the sounds.

At first, every bang deserves investigation. Every flap of canvas sounds suspicious. Every halyard makes you wonder whether something has broken.

That was certainly true for me when I first started living on a sailboat full-time. The sounds I had listened to at night for most of my life suddenly disappeared and were replaced by wind, masts, ropes, water and the movement of the boat.

Then, slowly, your brain builds its own little boat-noise library.

Halyard. Fine.

Fender. Fine.

Wind changed. Better check the anchor.

Flying fish… well, that one may still require getting up.

It is one of those little things about life on a boat that can be difficult to explain to non-sailors.

Boats are rarely truly silent.

Even safely tied up in a marina, something is usually moving, tapping, squeaking or flapping somewhere.

Eventually, many of those sounds become strangely comforting.

Until, of course, somebody starts stealing the pilot boat.

Then you should probably get out of bed.

Thanks to everyone who joined this Sailoscope Asks.