Salto When the Weather Turns — What Rain, Storms and a High River Mean for Your Visit

Words by Mathias Nicola · October 2026

Not long ago a couple from Germany cancelled their trip to Salto. They had seen the news: the Uruguay River was rising, families were preparing to leave their homes, and the emergency committee was meeting every day. They decided it was not the right time to come. Other people cancel for less, usually a forecast with a few days of rain in it. I understand both, but the news only tells half the story. Salto is not a beach. This note explains what a high river changes, what rain changes, and what carries on regardless.

The news is true. When the river is high, the port closes, the lowest streets by the water flood, and the CECOED, the local emergency committee, moves families out of their homes once the gauge gets close to 12 m. It is also true that a city of 114,000 people carries on above the flood line. The hotels, restaurants, museums, bus terminal and airport are nowhere near the water. The hot springs, which are the main reason people come, are on other rivers altogether, and they have covered pools for rainy days.

Salto is a year-round destination. The hot springs have always been as popular in winter as in summer, and the city depends partly on its visitors. A high river is exactly when the cancellations come in, and exactly when the people who run the hotels, restaurants and pools need visitors most.

Where to check the river

When the river is high I keep two pages open, both on saltouruguay.com, a Salto site I also run. The river page shows the height at the port, updated every 15 minutes from the Salto Grande station, plus the last 30 days, the key levels on the gauge and every major flood since 1959. The home page has the 5-day forecast from Inumet, Uruguay's national weather service, which also issues the colour-coded weather warnings.

How a river rise works here

The Uruguay River does not flood Salto the way a flash flood hits a mountain town. The water comes from rain in the upper basin, in southern Brazil and the Argentine provinces of Misiones and Corrientes, and it takes days to arrive: about 10 days from the upper basin and 2 days from the lower one. The Salto Grande dam, 15 km upstream of the port, controls what comes down. The reservoir cannot stop a big flood, because once the lake is full the water has to go out through the spillway. But it does lower the peaks, by up to 3 m in the biggest floods according to the Comisión Técnica Mixta, the binational body that runs the dam. Without the dam, the rise of August 2026 would have reached 12.20 to 12.30 m instead of about 11.6 m.

Every day at 1 pm the Comisión publishes the maximum height it expects at Salto, and the CECOED tracks the river daily and plans any evacuations in advance. In other words, a rise is announced days ahead, and it builds slowly enough to plan around.

The river is measured on the gauge at the port, in metres above the port's local zero. These are the levels that matter.

The people who have to leave live in the lowest streets along the river: the two costaneras, the riverside avenues north and south of the port, and the blocks just behind them. The city centre sits on a bluff above all of this. Even in April 1959, the worst flood on record, the river reached 18 m with no dam to hold it back. The water got to the bottom of Calle Uruguay, the main street, by the old customs house, and stopped a block short of the Intendencia, the city hall. The rest of the centre stayed dry, and it has stayed dry in every flood since. Plaza Artigas, the hotels in the centre, the bus terminal, the museums and the restaurants are never part of the picture.

These figures include both the families taken to shelters and those who moved in with relatives. In the worst flood since the dam was built, that was 3 people in every 100.

The pictures that make the news show the costanera under water, the port cranes standing in the river, and low houses with water at the door. They are real, but they show a narrow strip along the river, not the city.

Where the hot springs are

None of Salto's hot springs are on the Uruguay River. Termas del Daymán, 10 km south of the city on Route 3, is on the Daymán River, and so is Parque Termal Agua Clara, 7 km from town. Termas del Arapey is 80 km to the north-east, on the Arapey River, in open countryside. Termas de Salto Grande and the Hotel Horacio Quiroga are on the shore of the lake behind the dam, about 15 km north. The hot water itself comes up from 1,000 to 2,200 m underground, from the Guaraní Aquifer, and has nothing to do with the river level.

The Daymán River can rise after heavy local rain. It did in August 2026, when the water reached the edge of the park at Termas del Daymán. The pools stayed open the whole time, from 8am to 10pm. The CECOED described the Daymán as a river that rises quickly and drops again within hours.

When it rains for days

Uruguay has no rainy season. Rain comes in spells of a day or two, spread across the year, and Inumet's forecast picks them up 5 days ahead, with a colour-coded warning when a storm is going to be severe. A rainy week in Salto is rarely 7 days of rain. It is usually 2 or 3 wet days with dry ones in between.

Rain changes the order of your days, not the trip. At a beach, rain ruins the holiday. At the hot springs it is part of the experience. The water comes out of the ground at 39 to 46 °C whatever the sky is doing, and the pools are open every day of the year. The hot springs have always been busiest in the cold months, not the warm ones. The people who cancel simply leave the pools quieter for everyone else.

The only thing that clears the open-air pools is lightning, and only while it lasts, which here means hours rather than days. For that hour there is the covered pool, the spa or the thermal bath in your room. The rest is a question of planning: the pools, the museums, Energimundo with children and a long lunch on the wet days; the countryside, the river and the walks on the dry ones. The next section lists the covered pools.

Hot water under a roof

Rain is not a problem at the hot springs. Cold rain on your shoulders while the rest of you sits in hot water is one of the best feelings Salto has to offer. When there is thunder around, the covered pools are the place to be, and most of the hot springs have at least one.

The city on a wet day

Salto's museums are in the centre, a few blocks apart, and all three open on weekdays only, so a museum afternoon is a Monday-to-Friday plan. The hours below come from the Intendencia's Agenda Salto (October 2026) and change with the season, so it is worth checking on the day. There is a page on the museums in Explore. With children, the children's library of the Biblioteca Felisa Lisasola, open Monday to Friday, 8am to 4pm, is the quiet option.

In the evening the Teatro Larrañaga goes back to being a theatre. What is on in Salto this week is listed in the agenda on saltouruguay.com.

The dam is worth a visit on a grey day, and even more so when the river is high, because that is usually when the spillway is open. Guided tours from the Uruguayan side run Monday to Friday from 7am to 4pm and on weekends and holidays from 8am to 4pm, and last about 90 minutes: a short film, a talk, a bus ride across the dam to the viewpoint, and a look inside the machine hall. Tours are free and booked in advance, online or on +598 4732 7777, and the only closing days are 1 May, 24, 25 and 31 December and 1 January. The Salto Grande page has the details, the environmental visit, the free Friday bus from the city, and Energimundo, the free science museum beside the dam, which is the wet-day answer with children.

A long lunch is the other classic answer to a rainy day. Salto is where Tannat, now Uruguay's signature grape, was first planted, in Pascual Harriague's vineyard in the 1870s. There is a Journal note about it, and the Food page lists where to drink it.

What stops, and what does not

• The passenger boat to Concordia stops running when the gauge reaches 10.55 m, by order of the Prefectura. You can still cross by the bridge over the dam, which is the route the buses use.
• The riverside walks and the beach at Arenitas Blancas are the first to flood, from about 10.5 m.
• Horse riding, walks, birdwatching, the scenic flight and the beach move to the dry days. The hot springs, the spa, the museums and Energimundo fill the wet ones.
• Dirt roads to the estancias turn to mud after heavy rain. Your host will know the state of the road on the day, and it is best to arrive in daylight.
• Everything else carries on as normal: the hot springs, hotels, restaurants, museums, long-distance buses and flights to Nueva Hespérides airport.

Booking when the forecast looks bad

Flexible rates are the sensible choice when the forecast shows rain or the river is high, and most hotels at the hot springs offer them. A river rise is announced days in advance, the forecast covers 5 days, and the gauge is public, so nobody gets caught out. A light waterproof jacket, sandals for the pools and a dry change of clothes cover most of what a wet week needs.

The rain passes. The river rises slowly and falls the same way. And the water in the pools stays at around 40 °C.

Related experiences: Hot Springs Day · Spa Day · Massage & Wellness