Acqua Alta - High Water in Venice

High Water, Alta Acqua

Venice, Italy

Questions & Answers about high tide in Venice

About Alta Acqua

Acqua Alta, when the tide rises and floods lower areas of Venice (usually around St Mark’s Square) is a natural and seasonal occurence.

When this happens, teams of workers placed raise platforms along most of the affected routes to enable people to continue moving around the city (see image below).

How long does Acqua Alta last in Venice?

Acqua Alta usually only lasts a few hours and happens mostly in winter.

Should you be worried? No. In the areas most affected (usually around St Mark’s Square as it’s the lowest part of Venice), raised wooden walkways are put up for people to walk on.

Once the high water is past, the flood receeds.

Alta Acqua Questions

By Marco Ober – Own work, CC BY-SA 4.0, Link

Does Venice stop when there’s Acqua Alta?

During a normal Acqua Alta Venice continues as normal.

Should bring waterproof or Wellington/rubber boots?
You don’t need to bring special boots. If there is high water, you can just go to an area of Venice where it hasn’t flooded and you will be fine.

Should you be in Venice when there’s a high tide you will find many shops sell waterproof over shoes and rain capes. If you wish, you can find a store that sells rubber boots.

How high is an alta acqua high tide?

80–109 cm (Minor/Moderate): Frequent, low-level flooding in the lowest parts of the city (e.g., St. Mark’s Square).

110–139 cm (Very Intense): Significant flooding (approx. 12% to 58% of the city), covering areas like the Rialto Bridge.

140+ cm (Exceptional): Major flood events (over 59% of the city), triggering sirens.

Alta Acqua Today

Acqua Alta High Water Venice Canal Bridge

The new Venetian Mose (Moses) project is used to prevent the worst of tides from entering the Venetian Lagoon.

How long does an acqua alta last?

So how long do these flood waters last? Not long. Most an hour and a half or so. So why not embrace the occasion to be part of one of Venice’s natural events – or take the time to go to a bar, eat and drink.

During times of high water, the acqua alta Venice is well known for, most everything continues as normal because, for Venetians, this is normal.

Transport services will continue as normal and will only be affected if there’s an exceptionally high tide.