First time in Cardiff? What to know before you go

Cardiff is compact. The castle sits in the middle of the shopping streets, the Victorian arcades run off them, and the Bay is a 20–25 minute walk or a short bus ride from the centre. Two days covers the essentials without rushing.

Book castle and Bay attraction tickets online the day before; walk-up queues are longest on weekends and school holidays. The free museums and the market are the best value hours of the trip.

Cardiff is cheaper than London for the same standard of hotel and food. A pub main is roughly £12–18, a coffee £3–4, a pint £4.50–6, and a city-centre hotel room £80–150 a night, rising sharply on match weekends and graduation weeks. Hostel beds run £25–40.

Most museums and the market are free, so a two-day trip can stay under £60 per person in admissions if you skip the paid tours. Sunday trading is shorter: many shops open six hours, usually 11:00–17:00, and some smaller places close altogether. Pubs serve food until about 21:00; kitchens in quieter suburbs stop earlier.

Cardiff Central is on the Great Western main line: London Paddington is about 2 hours, Bristol about 50 minutes, Swansea about an hour. Advance tickets booked 4–12 weeks ahead are far cheaper than walk-up fares. Cardiff Airport (CWL) is small and 20 km west of the city; the bus and taxi are the usual links, and many travellers instead fly into Bristol and take the train.

Inside the city you do not need a car. The centre and the Bay are walkable in about 25 minutes along the river, or one stop on the Bay line from Cardiff Queen Street. Buses cover the suburbs and St Fagans. Parking in the centre is expensive and congested on match days.

Pay with contactless or a card almost everywhere; keep a little cash for market stalls and small cafés. Tipping follows the UK norm: 10–12.5% in restaurants if no service charge is on the bill, not expected in pubs. Tap water is safe and free to ask for.

Type G three-pin plugs, 230 V. Weather changes fast: pack a waterproof layer even in summer, and plan an indoor backup day. On rugby internationals the whole centre is busy from mid-morning, pubs fill, and hotel prices spike — check the fixture list before you book.

Cardiff is generally a safe city; the usual city-centre cautions apply late at night around St Mary Street and Queen Street. Keep to lit streets and normal precautions.

May to September gives the best odds of dry, mild days and long evenings on the Bay. July and August are busiest with families and festival crowds. December brings the Christmas market and lights in the centre, which is a good short break if you accept short daylight and rain.

Avoid, or book around, Six Nations rugby weekends in February and March: the atmosphere is the attraction, but hotels and trains sell out and prices jump. Weekdays outside school holidays are the quietest time for the castle and St Fagans.