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Cardiff Bay (Water) to Castell Coch buses

Find Transport to Castell Coch

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Trip Overview

The average bus between Cardiff Bay (Water) and Castell Coch takes 1h 24m and the fastest bus takes 38 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.

1h 24m
Duration
9 mi
Distance
£5
Average price
Hourly
Frequency

Bus, line 136 bus

best
  1. Take the bus from Mount Stuart Square to Cardiff Bus Interchange Bay 1bus bus 304
  2. Take the bus from Cardiff Bus Interchange Bay 2 to Securicorbus bus 136 / ...
1h 16m
£4–5

Cardiff Bay (Water) to Castell Coch bus times

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 7:54 PM which arrives into Castell Coch at 8:32 PM. All services require a transfer at Cardiff Bus Interchange Bay 2 and take an average of 1h 24m. The schedules shown below are for the next available departures.

Departing Monday, October 19, 2026

  •  → 

    First South & West WalesCardiff Bus7h 41m • 1 change

  •  → 

    First South & West WalesCardiff Bus51 min • 1 change

  •  → 

    First South & West WalesCardiff Bus1h 9m • 1 change

  •  → 

    First South & West WalesCardiff Bus59 min • 1 change
  • Show more

Departing Tuesday, October 20, 2026

  •  → 

    First South & West WalesCardiff Bus7h 47m • 1 change

  •  → 

    First South & West WalesCardiff Bus51 min • 1 change

  •  → 

    First South & West WalesCardiff Bus1h 9m • 1 change

  •  → 

    First South & West WalesCardiff Bus59 min • 1 change
  • Show more

Departing Wednesday, October 21, 2026

  •  → 

    First South & West WalesCardiff Bus7h 47m • 1 change

  •  → 

    First South & West WalesCardiff Bus51 min • 1 change

  •  → 

    First South & West WalesCardiff Bus1h 9m • 1 change

  •  → 

    First South & West WalesCardiff Bus59 min • 1 change
  • Show more

Departing Thursday, October 22, 2026

  •  → 

    First South & West WalesCardiff Bus7h 47m • 1 change

  •  → 

    First South & West WalesCardiff Bus51 min • 1 change

Frequently asked questions

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.

Map of how to get from Cardiff Bay (Water) to Castell Coch.ExpandLaunch map view
  • Distance: 8.9 mi
  • Duration: 1h 24m

What companies run services between Cardiff Bay (Water), Wales and Castell Coch, Cardiff, Wales?

You can take a bus from Mount Stuart Square to Castell Coch via Cardiff Bus Interchange Bay 2 and Securicor in around 1h 16m.

Operators