Avon Street public toilets have been closed - and fears have been raised that it will inconvenience hundreds of coach passengers every day.
People are now being advised to walk five minutes to the nearest open public toilets or use one of "several cafes" nearby.
The manager of Riverside Cafe near the coach park says the closure will harm his business and it "beggars belief" that it has happened before the closure of the coach drop-off point.
But according to Bath and North East Somerset Council, the toilets were in poor condition and attracting "numerous" complaints from users.
"They had remained open to provide facilities for the coach park as an interim measure prior to the redevelopment of the Bath Quays area," the council said.
"Due to the short-term requirement of the facilities, the toilets were excluded from the modernisation and improvement package for toilets in our area."
Andy Hayter, who runs the cafe, said: "It seems a basic application of common sense to allow these facilities to remain open until closure of the coach park operation as a whole.
"It's a major facility for people who are being dropped off there, not least school children and disabled."
Both Mr Hayter and Bath's MP Wera Hobhouse pointed out that the the toilets will be needed by visitors to the Christmas market, which is only two months away.
He said: "On average thousands of passengers pass through the coach park every day of the Christmas market.
"They're asking cafes to accept 40-50 people who suddenly turn up and want a pee.
"The more I talk about it the more absolutely crazy it seems.
"My point is quite simply when the coach facility is terminated early next year, then you close the toilets down.
"It beggars belief. It's not got one ounce of logic in it."
Mr Hayter is concerned that the closure of the toilets leaves him and his employees without a toilet to use themselves.
"It potentially does put the whole operation under threat but they don't think of things like that," he said.
Criticism from the MP
Bath MP Wera Hobhouse said the timing of the closure was "very poor" given the impending start of the Christmas market.
The toilets were listed as available facilities on both the council and Visit Bath websites three days after their closure, until Bath Live alerted both parties.
Mrs Hobhouse said: "This appears to be a case of very poor timing by the council.
"The Riverside coach park is still in use, and is still advertised as having toilet facilities.
"Visitors are being subjected to a great deal of distress.
"I would urge the council to keep the toilets open, whilst large numbers of visitors are still using this site.
"We need to get this right in time for the Christmas market."
Toilets closure notice
Signs near the toilets read: "We are sorry for any inconvenience but these toilets are now closed.
"There are plenty of public toilets available within a five-minute walk, plus several cafes.
"For the closest public toilets, turn left onto Avon Street and walk five minutes to Kingsmead Square for the Seven Dials, Monmouth Street toilets shown on the map below."
What the council said in full
"The public toilets in Avon Street closed permanently on Monday, September 17.
"The toilets were in a poor condition. They had remained open to provide facilities for the coach park as an interim measure prior to the redevelopment of the Bath Quays area.
"Due to the short term requirement of the facilities, the toilets were excluded from the modernisation and improvement package for toilets in our area.
"They have therefore remained in a poor state with dilapidated fixtures and fittings, and as a result, they were subject to numerous complaints from residents and visitors to the city.
"There are plenty of public toilets a short walk from the Riverside coach park.
"Visitors still arriving by coach at this location will be directed to the nearest facilities via signage on the former toilet block and information on the council’s website.
"All coach operators have been given detailed information on the closest alternative toilets to help ensure their customers are fully informed.
More of the latest B&NES Council news
"The Odd Down park and ride coach park will be fully operational next month. 16 bays are already available for use by coaches and their drivers at this facility.
"Public conveniences are available at the site. We expect the Riverside coach park to close in the spring of 2019.
"We are also in discussion with the Christmas market organisers to ensure sufficient temporary toilets are in place for the event."
Coach park on the move
Riverside coach park is being closed down as the council redevelops the riverside in its flagship Bath Quays North project.
In its place a new long-stay coach parking site at the Odd Down park and ride facility is being created.
Sixteen bays have opened and a further 13 are due to be made available.
The council said amenities include toilets, water supply, rubbish bins, coach toilet waste disposal as well as park and ride buses available for travel into Bath city centre.
For coaches parking in the new designated area it will cost £1 for up to 24 hours.
The relocation has been funded by £1.8 million from the West of England Combined Authority from a £10 million pot for projects which are said to improve walking and cycling links, public spaces, public transport and road safety in the region.
It was approved at a meeting of Weca on June 28 2017.
A new coach park on the outskirts of Bath was the best solution to the city’s lack of space for tour coaches, according to former cabinet member for transport Cllr Anthony Clarke, following a study by engineering consultants BuroHappold.
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