Bath is a good city to get rained on in, because most of what's worth doing here is already indoors. The Roman Baths, Thermae Bath Spa, Holburne Museum, Museum of East Asian Art and Guildhall Market will all get you through a wet day without once needing an umbrella between stops, and between them they cover a full day if you plan the order sensibly.
This goes deeper than a quick list: below is what each option actually costs and when it's open, plus how to string them together depending on how many hours of rain you're planning around.
The big indoor sights
The Roman Baths. The city's must-see is almost entirely under cover: the Great Bath, the temple and the museum, plus an audio guide included in the ticket. Adult admission runs from around £27, though it's timed-entry and the price varies by date and season, so check the current price and book a slot on the Roman Baths guide before you go.
Bath Abbey. A short walk from the Roman Baths, the Abbey itself is free to enter for prayer and quiet visiting, with a charge for the tower tour and for wider visitor access outside service times. Current pricing has moved around in recent years, so check the Bath Abbey guide for what applies on the day you visit rather than relying on an old figure.
Holburne Museum. At the top of Great Pulteney Street, this is Bath's fine art museum, and it's fully indoors. Adult admission is £16.50, concessions £8, and anyone 18 or under gets in free. It's open Monday to Saturday, 10am to 5pm, and Sunday and bank holidays, 11am to 5pm. If you're on a budget, turn up on a Wednesday between 3pm and 5pm, when the permanent collection is free to everyone.
Museum of East Asian Art. A smaller, quieter option on Bennett Street near the Circus, with around 2,000 objects spanning roughly 7,000 years of Chinese, Japanese, Korean and Southeast Asian art. Adult admission is £7.50, open Tuesday to Saturday, 10.30am to 5pm (closed Monday and Sunday), and most visitors get round comfortably in 45 to 75 minutes, making it a good fit for a shorter break in the weather.
Museum of Bath at Work. Tucked into a former Georgian real tennis court, this covers Bath's industrial history rather than its Georgian or Roman side, built around a working Victorian engineering firm's original workshop. It's open daily from 10.30am to 5pm between April and October, weekends only in February and March, and closed November to January. We couldn't independently confirm a current adult admission price for this one, so check the ticket price directly on the museum's own site before visiting; see our full Museum of Bath at Work guide for what else is inside.
No.1 Royal Crescent. The restored Georgian townhouse museum at the end of the terrace, open Tuesday to Sunday, 10am to 5.30pm, last entry 4.30pm. Current admission pricing and discount codes are covered in our No.1 Royal Crescent guide, worth checking before you go since ticket prices change.
American Museum and Gardens. Out at Claverton Manor on the edge of the city, a hands-on museum of American history and folk art, open Tuesday to Sunday from mid-February to the end of December. Good for a half-day out of the wet if you're prepared to travel a little further.
Free and covered
Victoria Art Gallery. Right by Pulteney Bridge on Bridge Street, the permanent collection is free (special exhibitions carry a charge), which makes it the easiest zero-cost way to spend an hour indoors in the middle of town.
Guildhall Market. A genuinely covered indoor market on the High Street, between the Abbey and Pulteney Bridge, with around twenty independent stallholders: a deli, a cafe, booksellers, jewellers and a butcher among them. It runs Monday to Saturday and is closed on Sundays, and because it has entrances on both the High Street and toward the river, you can walk straight through it as a shortcut as well as a browse. See the full Guildhall Market guide for what's typically on each stall.
Bath Farmers' Market. If your rainy day happens to fall on a Saturday, the farmers' market runs 9am to 1.30pm inside and around the old Green Park Station building, with everything sold direct by the producer from within about 40 miles of Bath. It's free to browse and the historic station roof keeps most of it dry. Full detail in our Green Park Station guide.
SouthGate shopping centre. When you've exhausted the museums, SouthGate is a fully covered shopping centre a few minutes from the station, useful for an hour of browsing that costs nothing beyond what you choose to buy.
Warm and wet: Thermae Bath Spa
If you actually want the rain to add something rather than just avoiding it, Thermae Bath Spa's open-air rooftop pool is the move: naturally warm water, steam rising around you while it pours. A two-hour session runs from around £42.50, and it's strictly 16 and over. Full detail, including the rest of the spa's layout, is in our Thermae Bath Spa guide.
Building a full rainy day
If you've got a whole wet day to fill: start with the Roman Baths in the morning before it gets busy, walk two minutes to Guildhall Market for lunch at the deli or cafe stalls, spend the early afternoon at the Holburne or the Museum of East Asian Art depending on how much time you have left, and finish with a Thermae Bath Spa session in the late afternoon or early evening, when the rooftop pool feels best against a grey sky. If you only have a couple of hours and want it free, pair the Victoria Art Gallery with a slow walk through Guildhall Market and SouthGate.
FAQs
What's completely free to do indoors in Bath when it rains? The Victoria Art Gallery's permanent collection, Guildhall Market, and browsing SouthGate shopping centre all cost nothing beyond what you spend.
Is the Roman Baths a good rainy-day option? Yes, it's almost entirely under cover, including the Great Bath, the temple and the museum. Book a timed entry slot in advance rather than turning up.
Is Thermae Bath Spa's rooftop pool actually outdoors? Yes, the rooftop pool is open-air, but the water itself is naturally warm, which is part of why it works so well in the rain rather than despite it.
Are Bath's markets covered if it's raining? Guildhall Market is a fully indoor covered market open Monday to Saturday. The Saturday Farmers' Market at Green Park Station runs under the roof of the old station building, so most of it stays dry too.
Which museum is quickest if I only have an hour? The Museum of East Asian Art on Bennett Street is designed to be seen in 45 to 75 minutes, making it the best fit for a short weather-driven stop.
Can I do the American Museum on a short trip? It's out at Claverton Manor on the edge of the city, so budget at least half a day including travel time, and check it's open, since it closes for January and part of February.