Carmarthen Petrol & Diesel Prices
The cheapest unleaded in Carmarthen is 168.9p at Tanerdy Garage and Gwalia Garage. The dearest is 173.9p at CKs Supermarket: 5.0p a litre, £2.75 a tank more.
Prices last checked 25 October 2026 · 11 of 13 Carmarthen forecourts reported in the last 14 days · official Fuel Finder data
Cheapest petrol in Carmarthen
- 1 Tanerdy GarageSA31 2EY · 5 days ago 168.9p
- 2 Gwalia GarageSA32 7DR · 5 days ago 168.9p
- 3 MFG St ClearsSA33 4JW · 1 day ago 169.9p
- 4 MFG Morrisons CarmarthenSA31 2NF · 3 days ago 169.9p
- 5 Ascona Forge Filling StationSA33 4NA · 1 day ago 169.9p
- 6 Ascona Ivy Service StationSA33 4JP · 1 day ago 169.9p
- 7 Ascona Tenby Road Service StationSA33 5DT · 1 day ago 169.9p
- 8 Vst Towy Services StationSA31 2BN · 6 days ago 169.9p
Cheapest diesel in Carmarthen
- 1 Tanerdy GarageSA31 2EY · 5 days ago 194.9p
- 2 Gwalia GarageSA32 7DR · 5 days ago 194.9p
- 3 MFG Morrisons CarmarthenSA31 2NF · 3 days ago 194.9p
- 4 Derwydd ServicesSA33 6TP · 11 days ago 195.9p
- 5 MFG St ClearsSA33 4JW · 1 day ago 196.9p
- 6 Ascona Forge Filling StationSA33 4NA · 1 day ago 196.9p
- 7 Ascona Ivy Service StationSA33 4JP · 1 day ago 196.9p
- 8 Ascona Tenby Road Service StationSA33 5DT · 1 day ago 196.9p
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Supermarket fuel prices in Carmarthen
| Supermarket | Sites | Petrol from | Diesel from |
|---|---|---|---|
| Morrisons | 1 | 169.9p | 194.9p |
| Tesco | 1 | 172.9p | 196.9p |
All petrol stations in Carmarthen
| Hours | |||||||
|---|---|---|---|---|---|---|---|
| Tanerdy Garage SA31 2EY | Murco | 168.9p | 194.9p | 179.5p | -1.5p | Mon 06:00 to 20:00 | 5d ago |
| Gwalia Garage SA32 7DR | Murco | 168.9p | 194.9p | 178.5p | -1.5p | Mon 06:00 to 20:00 | 5d ago |
| MFG St Clears SA33 4JW | Esso | 169.9p | 196.9p | 195.9p | -0.5p | 24 hours | 1d ago |
| MFG Morrisons Carmarthen SA31 2NF | Morrisons | 169.9p | 194.9p | 189.9p | -0.5p | 24 hours | 3d ago |
| Ascona Forge Filling Station SA33 4NA | Valero | 169.9p | 196.9p | 199.9p | -0.5p | 24 hours | 1d ago |
| Ascona Ivy Service Station SA33 4JP | Valero | 169.9p | 196.9p | 199.9p | -0.5p | Mon 06:00 to 21:00 | 1d ago |
| Ascona Tenby Road Service Station SA33 5DT | Valero | 169.9p | 196.9p | 199.9p | -0.5p | 24 hours | 1d ago |
| Vst Towy Services Station SA31 2BN | Texaco | 169.9p | 197.9p | 179.9p | -0.5p | 24 hours | 6d ago |
| Derwydd Services SA33 6TP | Murco | 170.9p | 195.9p | 182.9p | +0.5p | Mon 06:30 to 20:00 | 11d ago |
| Carmarthen Extra SA31 3AX | Tesco | 172.9p | 196.9p | 182.9p | +2.5p | 24 hours | 5d ago |
| CKs Supermarket SA31 3HL | Murco | 173.9p | 198.9p | +3.5p | Mon 07:00 to 22:00 | 12d ago |
Retailers must report a price change to the government's Fuel Finder scheme within 30 minutes, so a forecourt that last reported a few days ago simply has not changed its price. Opening hours are each retailer's own entry in the scheme.
2 stations have stopped reporting (more than 14 days) and are left out of every figure above
- oil 4 wales ltd Nantycaws, last reported 29 days ago
- Asda White Mill Express Petrol, last reported 27 days ago
A price that old is not a current market price, so we do not show it as one. These stations may have closed, changed hands or dropped out of the scheme.
More forecourts near Carmarthen
These 7 forecourts are outside Carmarthen's own postcodes, so they are not counted in the figures above. Distances are straight lines from the middle of Carmarthen.
| Forecourt | Miles | E10 | Diesel | Reported |
|---|---|---|---|---|
| Vst Pensarnau Service StationSA38 9HS | 13.2 | 166.9p | 195.9p | today |
| Windy Corner GarageSA39 9HP | 9.1 | 168.9p | 194.9p | 6d ago |
| Valley Service StationSA44 4AE | 12.7 | 168.9p | 194.9p | 2d ago |
| Daniel Davies and sons LimitedSA44 5EB | 10.6 | 169.9p | 195.9p | 12d ago |
| Vst Llanteg Services StationSA67 8QD | 13.9 | 169.9p | 194.9p | 6d ago |
| Preseli Service StationSA67 7PD | 14.7 | 169.9p | 193.9p | 12d ago |
| Preseli Service Station Limitednot reportingSA67 7PD | 14.7 | 172.9p | 196.9p | 25d ago |
Carmarthen against the rest
Average E10 unleaded. Bars start at 165p so the differences are visible.
Carmarthen fuel questions
Where is the cheapest petrol in Carmarthen today?
Tanerdy Garage and Gwalia Garage, at 168.9p a litre for E10 unleaded, from prices last checked on 25 October 2026. The Carmarthen average is 170.4p.
Where is the cheapest diesel in Carmarthen?
Tanerdy Garage, Gwalia Garage and 1 more, at 194.9p a litre, from prices last checked on 25 October 2026.
Which petrol stations in Carmarthen are open 24 hours?
6 of the 11 forecourts reporting in Carmarthen list 24-hour opening, including MFG St Clears, MFG Morrisons Carmarthen, Ascona Forge Filling Station, Ascona Tenby Road Service Station. Hours come from each retailer's own entry in the Fuel Finder scheme.
How often are these prices updated?
Retailers must report a price change to the government's Fuel Finder scheme within 30 minutes. We read the full data every 30 minutes and rebuild this page every morning.
Fuel prices near Carmarthen
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