The average bus between Cardiff Bay (Water) and Castell Coch takes 1h 7m and the fastest bus takes 37 min. There is a bus service every few hours from Cardiff Bay (Water) to Castell Coch. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Buses run hourly between Cardiff Bay (Water) and Castell Coch. The earliest departure is at 12:32 AM at night, and the last departure from Cardiff Bay (Water) is at 9:51 PM which arrives into Castell Coch at 11:06 PM. All services require a transfer at Customhouse Street JW and take an average of 1h 7m. The schedules shown below are for the next available departures.

48 min • 1 change

47 min • 1 change

37 min • 1 change

37 min • 1 change

6h 2m • 1 change

48 min • 1 change

47 min • 1 change

37 min • 1 change

6h 2m • 1 change

48 min • 1 change

47 min • 1 change

37 min • 1 change

6h 2m • 1 change

48 min • 1 change

47 min • 1 change

37 min • 1 change
Want to know about travelling from Cardiff Bay (Water) to Castell Coch? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct bus from Cardiff Bay (Water) to Castell Coch. However, there are services departing from Cardiff Bay (Water) station and arriving at Castell Coch station via Customhouse Street JW. The journey, including transfers, takes approximately 1h 7m.
Cardiff Bay (Water) to Castell Coch bus services, operated by First South & West Wales, depart from Mount Stuart Square station.
Cardiff Bay (Water) to Castell Coch bus services, operated by First South & West Wales, arrive at Ynys Bridge station.
The distance between Cardiff Bay (Water) and Castell Coch is 10.8 km. The road distance is 13 km.
You can take a bus from Mount Stuart Square to Castell Coch via Customhouse Street JW, Greyfriars Road GF, and Ynys Bridge in around 1h 1m.