Venice Acqua Alta: How to Prepare for High Water

How to prepare for acqua alta in Venice

To prepare for acqua alta in Venice, check the official tide forecast before leaving your accommodation, pack waterproof boots with good grip, protect your valuables and allow time to change your route. Use the raised walkways where available, check waterbus updates and wait somewhere dry if your route is flooded. A tide forecast is more useful than a rain forecast: high water can arrive without rain.

This guide focuses on practical preparation. For the wider causes and history, read our acqua alta in Venice guide.

Check the tide, timing and route first

1. Read the latest local bulletin. The Comune di Venezia's Tide Forecasting and Warning Centre publishes forecasts and alerts. Check the predicted peak time as well as the height, and ask your hotel to explain the bulletin if needed. The city also uses warning sirens; check the actual forecast when you hear an alert.
2. Distinguish tide height from street depth. A reading in centimetres refers to Venice's tide-gauge reference level, not that much water on every street. The depth at your feet depends on the elevation of that particular pavement. St Mark's Square and other low spots can be affected while nearby routes remain dry.
3. Plan around the peak. Many high-water episodes recede within a few hours, but timing and severity vary. Move an outdoor walk to a drier part of the day rather than assuming a fixed daily flooding time or a guaranteed duration.
4. Check your actual route. Use the VeniceXplorer map to locate places and transport, then confirm flooding and accessible entrances with the tide bulletin, accommodation staff and signs on the ground. A sightseeing map is not a guarantee that a path is dry.

Tip: Save your accommodation's address and a return route on your phone before setting out, and keep the phone in a waterproof pouch.

When high water is most likely, and what MOSE changes

Acqua alta means “high water”: unusually high tides temporarily flood low-lying streets and squares. The risk is greatest in autumn and winter, especially around October to January. The Comune di Venezia's historical seasonal statistics identify November as the month with the most high-water events. Events can also occur outside that period. May to September generally has a lower risk, rather than a guarantee of no flooding.

Astronomical tides, including stronger tides around new and full moons, combine with weather conditions. Sirocco winds can drive Adriatic water towards the lagoon, while low atmospheric pressure can raise water levels. Long-term sea-level rise adds to the city's vulnerability.

Venice's relationship with flooding goes back centuries. Two major events reached 194 cm on 4 November 1966 and 187 cm on 12 November 2019, measured against the local tide reference, not as street-water depth. Both caused severe damage to the city and its cultural heritage, including St Mark's Basilica.

MOSE (Modulo Sperimentale Elettromeccanico) is the system of movable barriers at the lagoon inlets. Its gates can temporarily separate the lagoon from the sea to protect Venice against high tides. This protection does not remove the need to check local conditions, access and transport before travelling.

Pack for dry feet and protected belongings

• Waterproof footwear: pack rubber boots or sturdy waterproof overshoes with soles that grip. The waterproof height matters: water over the top will get inside. Disposable covers can tear, and improvised plastic bags are slippery. Boots are not a reason to enter deep or unsafe water.
• Practical layers: take a water-resistant jacket and trousers, warm layers and gloves in cold weather. Quick-drying clothes and spare socks make damp conditions easier to manage.
• Rain protection: a compact umbrella or poncho is useful when rain accompanies the tide; choose gear you can manage on a narrow, busy walkway.
• Waterproof storage: protect documents, electronics and other valuables in a waterproof bag or pouch. Keep luggage light enough to carry over steps and bridges.

Ask your accommodation about access

Choose a property by its entrance and approach route, rather than assuming an entire district will stay dry. Dorsoduro and Cannaregio both deserve consideration, but a neighbourhood name does not establish the flood risk at an individual doorway.

• Ask whether the entrance or ground-floor rooms are affected at the predicted tide level.
• Check whether the property uses flood barriers, raised access or an alternative entrance, and how to contact staff if you arrive during the peak.
• Ask which nearby transport stop and walking route will be usable with your luggage.
• If you use a wheelchair or have limited mobility, confirm the whole route with the property and operator. Temporary walkways, bridge steps and crowded detours may make an otherwise manageable journey difficult.

For help organising transfers or adapting plans, contact the VeniceXplorer personal concierge.

Use walkways carefully and recheck transport

Walking during acqua alta

The temporary raised walkways, called passerelle, help people cross selected flooded routes, including around St Mark's Square. They do not cover every street or guarantee passage at every tide height. Follow current signs and staff instructions; installations and routes can change as conditions change.

Allow extra time for queues, walk slowly, let people pass and keep the narrow platforms clear of luggage and photo stops. Avoid wading where you cannot see the pavement: hidden steps, uneven stones and canal edges are hazards. If no safe route is available, wait somewhere dry instead of pressing on.

Waterbuses and airport journeys

Vaporetti may keep running on modified routes, but high water can affect boarding gangways, stops and services. Use our vaporetto lines guide for normal routes and the ACTV pass guide for ticket coverage; check ACTV's high-tide service information and the notices at your stop for changes. Staff and onboard information take precedence over a saved timetable. Information checked on 5 November 2026; recheck for your travel date.

This applies to journeys along the Grand Canal as well as island connections. Gondolas and water taxis may also be affected and are not guaranteed substitutes; confirm availability and cost with the operator.

Arriving by air? Use the current Marco Polo Airport to St Mark's Square guide, then confirm your final stop and hotel approach for the predicted tide.

Stay safe around floodwater

• Avoid contact with floodwater, which can contain sewage and other contaminants. Keep children from playing in it, cover cuts, and wash exposed skin and hands with soap and clean water. Carry hand sanitiser for use when handwashing is unavailable.
• Keep away from submerged electrical equipment, cables and sockets. Report a hazard to local staff or the authorities rather than approaching it.
• Monitor weather warnings as well as tide information; wind and storms can change travel conditions.
• Do not follow a crowd into a route that looks unsafe. Take photographs from a dry, secure position without blocking residents, shop entrances or walkways.

Keep a flexible sightseeing and booking plan

Indoor visits can be useful alternatives, provided the venue is open and you can reach its entrance safely. Consider Museo Correr in St Mark's Square for Venetian art and history, including Renaissance paintings and historical objects; Teatro La Fenice for a visit or an opera, ballet or classical music performance when scheduled; the Gallerie dell'Accademia, or the museum and library at Fondazione Querini Stampalia. Check current access and opening arrangements before setting off; an indoor attraction is not automatically accessible during flooding.

There is no separate ticket or reservation to use the public passerelle. Ordinary transport and attraction tickets, and any applicable Venice day-visitor access requirements, remain separate matters. Check our Venice visitor guides for the rest of your trip. For more activity ideas, see things to do during acqua alta.

Ask a booked guide or tour operator about meeting-point changes, cancellations and the route before you travel. Minor high water may allow an adapted visit; a booking does not guarantee that a walking or boat excursion will operate in every condition.

If you are considering one of these experiences, check its conditions and the forecast first. These three booking pages open in Italian:

• Eating Venice Street Food Tour with Guided Tasting and Sightseeing.
• Traditional Bragozzo Boat Tour to Murano, Burano & Torcello.
• Walking Tour of Venice from St Mark's Square to Rialto.

You can also browse Murano tours and Burano tours, confirming island services and operator arrangements before departure.

Reflections on wet paving and the sight of shopkeepers fitting flood barriers can reveal another side of Venice. Enjoy that perspective respectfully: give residents space, avoid entering water for a photograph, and let the latest forecast shape your plans.