Moorings in South Glamorgan compared: Cardiff, Penarth and Barry

Each site is counted with its nearest town, if that is within 12km. Prices are for a 10m boat a year and a 10m boat a night, from published tariffs.

The short answer

Most choice: Cardiff (Cardiff 3, Penarth 2, Barry 1).
Cheapest by the year for a 10m boat: Barry (Cardiff £4,110 a year at its one priced site; Penarth typically £2,875 a year across 2; Barry £890 a year at its one priced site).
Cheaper for a night on a visitor berth (10m boat): Cardiff (Cardiff £15 a night at its one priced site; Penarth £15.50 a night at its one priced site).
Biggest boats: Penarth (Cardiff up to 6m (20ft); Penarth up to 21.9m (72ft); Barry up to 9.1m (30ft)).
Space now: Barry 1.

Town	Sites	Space now	A year, 10m boat	Cheapest a year	A night, 10m	Longest boat	Visitor berths	Electric	Pump-out	Diesel	Lift-out	Water
Cardiff	3	0	typically £4,110	Cardiff Marina £4,110	typically £15	6m (20ft)	2	1	0	0	1	Estuaries & tidal rivers 3
Penarth	2	0	typically £2,875	Cardiff Bay Yacht Club £1,200	typically £15.50	21.9m (72ft)	1	1	1	1	0	Estuaries & tidal rivers 2
Barry	1	1	typically £890	Barry Yacht Club £890	–	9.1m (30ft)	0	0	0	0	0	Coast & harbours 1