Planning, Budget & Seasons · 4 min read
Published · Updated
In brief
Acqua alta is the seasonal high tide that floods the lowest parts of Venice, mostly between October and January. It typically lasts a few hours around high tide, is forecast in advance, and since 2020 the MOSE barriers are raised against the higher tides. On a wedding day it usually means adjusting a route or a timing — and sometimes gaining spectacular reflections in St Mark's Square. It's one of the seasonal factors in the cost and planning of a Venice wedding.
When and why it happens
Acqua alta happens when a high astronomical tide combines with wind and low pressure over the Adriatic. It's most common in late autumn and early winter. The City of Venice's tide centre publishes forecasts, and sirens warn residents when a high tide is expected.
What the MOSE barriers change
The MOSE system of mobile barriers at the lagoon inlets has been in operation since 2020 and is raised when higher tides are forecast, protecting most of the city from serious flooding. Lower tides aren't blocked, so the lowest spots — especially around St Mark's Square — can still see water for a couple of hours.
What it means for your wedding day
Most of the city stays dry even on acqua alta days. Your planner and photographer check the forecast the day before and adjust: a slightly different walking route, a later start, a boat instead of a lowland walk, or portraits in higher areas. Ceremonies in the Comune's halls and in hotels go ahead normally.
Turning it into a photo opportunity
A few centimetres of water in St Mark's Square turn it into a mirror for the Basilica and the Campanile — some of the most striking images of Venice. With boots over your shoes (or bare feet for the brave), a short session can be magical. Fog often comes with the same season; see winter wedding in Venice.
How acqua alta is forecast
The City of Venice runs a tide forecasting service that publishes predictions days in advance and updates them as the weather develops; residents receive alerts, and sirens sound a few hours before significant high tides. Your planner and photographer will check it in the days before your wedding.
Forecasts give the expected peak height and time. Because high water follows the tide, it usually lasts only a few hours around the peak, then recedes.
Which areas flood first
St Mark's Square is one of the lowest points in the city and the first to see water, together with some fondamente along the Grand Canal and low-lying calli. Many parts of Venice — especially higher areas and the islands' raised walkways — stay dry. During significant events the city sets out raised walkways (passerelle) on key routes.
A tide-aware wedding day
If high water is forecast for the morning, we schedule portraits for the afternoon, or move the sunrise session to a higher area and keep St Mark's for later. Boat routes can change too: very high tides reduce clearance under some bridges, so gondolas and water taxis may take different canals.
For the ceremony itself, the Comune's halls and hotels are above street level and ceremonies go ahead; the only question is the walk or boat ride there.
What to pack from October to January
Rubber boots or plastic overshoes (sold in shops across the city when high water is expected), a spare pair of shoes, and a small towel. For the bride, a slightly shorter hem or a bustle keeps the dress clear of wet stone.
Acqua alta and wedding venues
Hotels and palazzi are used to high water and plan around it: some ground floors are raised, some have flood barriers, and staff know which entrances to use. Ask your venue how it handles high tides, which entrance guests should use, and whether the landing stage stays usable.
Photographing high water
The best reflections come with a few centimetres of calm water and soft light — early morning or late afternoon. We shoot low to the ground for mirror images of the Basilica and the Campanile; a bride can keep the dress dry with boots under the hem and a helper holding the train.
Acqua alta and guests
Tell guests in the invitation that high water is possible from October to January, suggest boots or overshoes, and share the planner's number for updates on the day.
How we plan for it
Every winter booking in our elopement collection includes a tide-aware plan B, and we keep an eye on the official forecast in the days before. See also rain on your Venice wedding day.
Official source
Tide forecast and acqua alta alerts
Official tide forecasts and high-water alerts for Venice, updated daily.
Comune di Venezia – Centro Maree — Tide forecast and acqua alta alerts ↗Frequently asked questions
Will acqua alta cancel our wedding?
Very unlikely. It lasts a few hours and mostly affects the lowest areas; timings and routes are adjusted.
When is acqua alta most likely?
Between October and January, with late autumn the peak period.
Can we take photos during acqua alta?
Yes — the reflections in St Mark's Square can be stunning. Bring boots.
How long does acqua alta last?
Usually a few hours around the peak of the tide, after which the water recedes.
Can gondolas run during acqua alta?
Often yes, but very high water reduces the space under bridges, so routes may change; the gondolier decides what's safe.
Do the MOSE barriers stop all flooding?
They're raised for higher forecast tides and prevent serious flooding; lower tides can still reach the lowest areas, like St Mark's Square.
Does acqua alta smell?
It's lagoon water — usually clear; it recedes within hours.
Can we still use a gondola during acqua alta?
Often yes, though routes may change under low bridges.
Is St Mark's Basilica protected from acqua alta?
Protective works have been carried out around the Basilica; the square can still flood at lower tides.