Petrol & diesel prices in Carmarthen today
The cheapest petrol near Carmarthen right now is 169.9p at Murco, Tanerdy Garage, 2.9p below the local average of 172.8p. Diesel starts at 195.9p at Murco, Gwalia Garage. We compared 11 forecourts within 8 miles of the town centre.
Cheapest isn't always best value: the live search also counts the fuel you'd burn getting there.
Cheapest petrol in Carmarthen
| # | Station | Price / litre |
|---|---|---|
| 1 | Murco, Tanerdy GarageTanerdy Garage, Tanerdy, Carmarthen, SA31 2EY · 1.0 mi from centre | 169.9p8 Oct |
| 2 | Murco, Gwalia GarageGwalia Garage, Rhydargaeau, Carmarthen, SA32 7DR · 3.7 mi from centre | 169.9p8 Oct |
| 3 | Murco, Derwydd GarageDerwydd Garage, Cynwyl Elfed, Carmarthen, SA33 6TP, Carmarthen, SA33 6TP · 4.5 mi from centre | 169.9p8 Oct |
| 4 | Morrisons, Parc PensarnParc Pensarn, Carmarthen, SA31 2NF · 1.0 mi from centre | 171.9p11 Oct |
| 5 | Texaco, Towy Service StationTowy Service Station, The Bridge, Caerfyrddin, SA31 2BN, Caerfyrddin, SA31 2BN · 0.5 mi from centre | 172.9p9 Oct |
| 6 | Valero, Lysonnen RoadLysonnen Road, Carmarthen, Carmarthen, SA33 5DT · 3.0 mi from centre | 173.9p9 Oct |
| 7 | Oil 4 Wales Ltd, Nantycaws Filling Station LtdNantycaws Filling Station Ltd, Llanddarog Road, Caerfyrddin, SA32 8BG, Caerfyrddin, SA32 8BG · 4.2 mi from centre | 173.9p26 Sept |
| 8 | Valero, A40 WestA40 West, Carmarthen Road, Carmarthen Road, SA33 4NA · 7.2 mi from centre | 173.9p9 Oct |
| 9 | Tesco, Tesco StoresTesco Stores, Lon Morfa, Caerfyrddin, SA31 3AX · 0.5 mi from centre | 174.9p2 Oct |
| 10 | Murco, C K's SupermarketC K's Supermarket, Old St. Clears Road, Johnstown, Carmarthen, SA31 3HL · 0.8 mi from centre | 174.9p6 Oct |
Cheapest diesel in Carmarthen
| # | Station | Price / litre |
|---|---|---|
| 1 | Murco, Gwalia GarageGwalia Garage, Rhydargaeau, Carmarthen, SA32 7DR · 3.7 mi from centre | 195.9p8 Oct |
| 2 | Murco, Tanerdy GarageTanerdy Garage, Tanerdy, Carmarthen, SA31 2EY · 1.0 mi from centre | 196.9p8 Oct |
| 3 | Morrisons, Parc PensarnParc Pensarn, Carmarthen, SA31 2NF · 1.0 mi from centre | 196.9p11 Oct |
| 4 | Murco, Derwydd GarageDerwydd Garage, Cynwyl Elfed, Carmarthen, SA33 6TP, Carmarthen, SA33 6TP · 4.5 mi from centre | 197.9p8 Oct |
| 5 | Texaco, Towy Service StationTowy Service Station, The Bridge, Caerfyrddin, SA31 2BN, Caerfyrddin, SA31 2BN · 0.5 mi from centre | 198.9p9 Oct |
| 6 | Tesco, Tesco StoresTesco Stores, Lon Morfa, Caerfyrddin, SA31 3AX · 0.5 mi from centre | 199.9p2 Oct |
| 7 | Murco, C K's SupermarketC K's Supermarket, Old St. Clears Road, Johnstown, Carmarthen, SA31 3HL · 0.8 mi from centre | 199.9p6 Oct |
| 8 | Valero, Lysonnen RoadLysonnen Road, Carmarthen, Carmarthen, SA33 5DT · 3.0 mi from centre | 199.9p9 Oct |
| 9 | Esso, A40A40, Carmarthen, Carmarthen, SA32 7EN · 3.5 mi from centre | 199.9p28 Sept |
| 10 | Oil 4 Wales Ltd, Nantycaws Filling Station LtdNantycaws Filling Station Ltd, Llanddarog Road, Caerfyrddin, SA32 8BG, Caerfyrddin, SA32 8BG · 4.2 mi from centre | 199.9p26 Sept |
Average fuel price by brand in Carmarthen
Cheapest isn't always best value
A station 2p cheaper but 6 miles away can cost you more once you count the drive. Refuel Radar ranks every forecourt around Carmarthen by what a full tank really costs you, including the trip, and can find the best stop along a route too.
Open the live mapCarmarthen fuel price questions
Where is the cheapest petrol in Carmarthen today?
The cheapest petrol (E10) within 8 miles of Carmarthen centre is 169.9p a litre at Murco, Tanerdy Garage (Tanerdy Garage, Tanerdy, Carmarthen, SA31 2EY), based on government Fuel Finder data at 11 Oct 2026, 22:54.
Where is the cheapest diesel in Carmarthen today?
The cheapest diesel (B7) within 8 miles of Carmarthen centre is 195.9p a litre at Murco, Gwalia Garage (Gwalia Garage, Rhydargaeau, Carmarthen, SA32 7DR), based on government Fuel Finder data at 11 Oct 2026, 22:54.
How much is petrol and diesel in Carmarthen?
Petrol averages 172.8p a litre across 11 Carmarthen stations, 1.9p below the UK average of 174.7p; diesel averages 198.7p, 1.1p below the UK average of 199.8p.
Which fuel brand is cheapest in Carmarthen?
On average Murco is currently the cheapest brand for petrol in Carmarthen, at 171.2p a litre across 4 forecourts. The cheapest individual station can still be a different brand, so check the table above.
How much can I save on fuel in Carmarthen?
Filling a 50-litre tank with petrol at the cheapest station in Carmarthen rather than an average-priced one saves about £1.45. Refuel Radar's Best Value ranking also counts the fuel you burn driving there, so a slightly dearer station closer to you can work out cheaper overall.
How up to date are these Carmarthen fuel prices?
Forecourts report their prices to the UK government's Fuel Finder scheme, and this page is rebuilt from that feed throughout the day. These figures were last refreshed at 11 Oct 2026, 22:54. Prices can change at any time, so always check at the pump.