Towns › Carmarthen
7 forecourts in Carmarthen, Carmarthenshire, Wales. Cheapest unleaded is 157.9p at Gwalia Garage. Cheapest diesel is 179.9p at Derwydd Services.
Prices as reported to Fuel Finder up to 28 Aug 2026, 16:00. Checking for newer prices…
| Station | Unleaded | Diesel | Super | Premium diesel | Updated |
|---|---|---|---|---|---|
| Gwalia Garage Murco · Gwalia Garage, Rhydargaeau, Carmarthen SA32 7DR | 157.9p | 179.9p | 166.5p | 187.5p | 2 days ago |
| Derwydd Services Murco · Derwydd Garage, Cynwyl Elfed, Carmarthen, SA33 6TP, Carmarthen SA33 6TP | 158.9p | 179.9p | 171.9p | – | 2 days ago |
| Mfg Morrisons Carmarthen Morrisons · Parc Pensarn, Carmarthen SA31 2NF | 159.9p | 180.9p | 175.9p | – | yesterday |
| Tanerdy Garage Murco · Tanerdy Garage, Tanerdy, Carmarthen SA31 2EY | 159.9p | 179.9p | 167.5p | 186.5p | 2 days ago |
| Ascona Tenby Road Service Station Valero · Lysonnen Road, Carmarthen SA33 5DT | 159.9p | 183.9p | 194.9p | 214.9p | 7 days ago |
| Cks Supermarket Murco · C K's Supermarket, Old St. Clears Road, Johnstown, Carmarthen SA31 3HL | 160.9p | 180.9p | – | – | yesterday |
| Asda White Mill Express Petrol Esso · A40, Carmarthen, Carmarthen SA32 7EN | 163.9p | 182.9p | – | – | 6 days ago |
Typical (median) and cheapest unleaded, and typical diesel, across Carmarthen's forecourts each day. Typical unleaded is unchanged over the last 7 days and up 2.0p over the last 30 days.
Search within 10 miles of Carmarthen instead
Forecourts must report every price change to the government's Fuel Finder scheme within 30 minutes. This page is rebuilt from the daily data and then checks the live feed when you open it, so the figures you see are the latest reported. Prices are per litre. A blank means the forecourt does not sell that fuel or has not reported a price.