A SHIP horn has woken Melburnians from one side of the bay to the other, leaving them fuming over the unwanted Monday morning wake-up call.

It’s understood the horn was going off for more than 30 minutes at 5.15am, and could be heard by people from Newport to Hampton.

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Frustrated Melburnians took to social media to vent their anger over the unwanted wake-up call.

Twitter user Lachie McDonald wrote: “Has half of Melbourne been woken by this ship horn? It’s out of control.”

Herald Sun health editor Grant McArthur, who lives in Melbourne’s inner west, was also woken up.

“What the hell is going on with that ship horn — has the rest of Melbourne been woken up as well,” he tweeted.

Has half of Melbourne been woken up by this ship horn? It's out of control #STFU 😡 — Lachie McDonald (@Lachie_McD) March 19, 2017

What the hell is going on with that ship horn - has the rest of Melbourne been woken up as well? — Grant McArthur (@mcarthurg) March 19, 2017

I wish the captain of what ever ship is in Hobson Bay / the Yarra / port of Mlbourne would stop with its fog horn. — Kim (@SirRubalot) March 19, 2017

Is that a ship in melbourne sounding its horn over and over? — Courtney Carthy (@ccarthy) March 19, 2017

Is it fair game to torpedo a ship that sounds it's horn for half an hour at 5am and prevents you from sleeping? — James Wagstaff (@james_wagstaff) March 19, 2017

To the ship that is in the Melbourne port and decided to sit on his horn for 30 minutes at 5am... F you, Trying to sleep. — Alyssa Jones (@Lyssarjones) March 19, 2017

What on earth is this boat horn in #melbourne all bout? — Matthew Vitiello (@mattvitielloWSC) March 19, 2017

A Victoria Police spokesman said the sound came from a ship’s emergency horn and was a false alarm.