Carmarthen
7 stations with live fuel prices · cheapest unleaded from £1.519
Carmarthen has 7 reporting petrol stations from 4 brands. Today's cheapest unleaded sits at £1.519 per litre, with the most expensive at £1.579, a spread of 6.0p across the city. The average across Carmarthen is £1.549 for E10 and £1.738 for diesel. Prices update hourly from the UK Government Fuel Finder service.
- Derwydd ServicesDerwydd Garage, Cynwyl Elfed, Carmarthen, Sa33 6tpMurco£1.519E10£1.679Diesel
- Gwalia GarageGwalia Garage, Rhydargaeau, Sa32 7drMurco£1.539E10£1.699Diesel
- Mfg Morrisons CarmarthenParc Pensarn, Sa31 2nfMorrisons£1.539E10£1.719Diesel
- Tanerdy GarageTanerdy Garage, Tanerdy, Sa31 2eyMurco£1.539E10£1.699Diesel
- Asda White Mill ExpressA40, Carmarthen, Sa32 7enEsso£1.559E10£1.829Diesel
- Cks SupermarketC K's Supermarket, Old St. Clears Road, Johnstown, Carmarthen, Sa31 3hlMurco£1.569E10£1.779Diesel
- Ascona Tenby Road ServiceLysonnen Road, Carmarthen, Sa33 5dtValero£1.579E10£1.759Diesel
Top fuel brands in Carmarthen
Carmarthen fuel prices: questions
Where is the cheapest petrol in Carmarthen right now?+
Today the cheapest unleaded in Carmarthen is £1.519 per litre at Derwydd Services. The cheapest diesel is £1.679 at Derwydd Services. Prices change hourly, so the leader can shift through the day.
How often do Carmarthen fuel prices update?+
Every hour. We pull prices directly from the UK Government Fuel Finder service, which retailers are legally required to update within 30 minutes of any change. The figures on this page reflect what every reporting station in Carmarthen has charged in the last 60 minutes.
Why does fuel vary so much across Carmarthen?+
The spread between today's cheapest and most expensive E10 in Carmarthen is 6.0p per litre. Local competition does most of the work: stations near a supermarket rival cut prices to stay close to it, while those without nearby competition can charge several pence more. Wholesale supplier contracts and how quickly each retailer follows market changes also matter.
How many petrol stations are in Carmarthen?+
Carmarthen has 7 reporting petrol stations from 4 different brands, all listed on this page with their latest prices. Stations are required to report under the UK Fuel Finder Scheme, so coverage is effectively complete for any forecourt with a public price.