Cardiff Bus 91 service runs to Penarth Pier and Cosmeston every Saturday, Sunday and Bank Holiday Monday from April 30th until September 25th 2016. Along the route there are plenty of places to visit - Cardiff Bay, Penarth Marina, Penarth town centre, and of course Penarth Pier and Cosmeston.
For more information and to view the timetable, please visit the Cardiff Bus website here.