Fuel Prices in Carmarthen town centre
Live comparison for SA31 area. Tracking 4 stations across 53 brands. For a detailed breakdown including 7-day price trends, market competition analysis, and savings tips, and also find Today’s Cheapest Petrol and Diesel in Carmarthen town centre .
Wales
4 Stations
4 Brands
Updated 19 Mar 2026
View Carmarthen town centre on the Fuel Map
Compare all 4 stations visually on our interactive map to find the cheapest fuel near your route.
7-Day Price Movement
Petrol (E10)
138.1p
142.3p
Diesel (B7)
157.9p
164.3p
Cheapest Today
Area Averages vs National
Petrol
139.4p
▼ 4.8p vs UK Avg
Super Unleaded
155.1p
▼ 7.1p vs UK Avg
Diesel
159.9p
▼ 6.0p vs UK Avg
Super Diesel
169.5p
▼ 17.0p vs UK Avg
All Fuel Stations in Carmarthen town centre (SA31)
Frequently Asked Questions About Fuel in Carmarthen town centre
As of 19 March 2026, the cheapest E10 petrol in Carmarthen town centre is 135.9p at TESCO, TESCO STORES, LON MORFA, CAERFYRDDIN, WALES.
There is currently a 6.0p difference between the cheapest and most expensive stations in Carmarthen town centre. For a standard 55-litre family car, that equals a saving of £3.30 per tank.
We update prices daily using data provided directly by fuel stations via the Competition and Markets Authority (CMA) Open Data scheme. This is a UK Government initiative requiring all major retailers to report live prices, ensuring you see the most accurate data for the Carmarthenshire area.
Not today. TESCO is actually cheaper than local supermarkets in SA31. It's always worth comparing before filling up.
We are currently tracking 4 active fuel stations in the SA31 area, operated by 4 different brands including MORRISONS, TESCO, MURCO and more.
The cheapest B7 diesel in Carmarthen town centre is currently 157.9p at MORRISONS. You can also use our interactive fuel map to compare diesel prices visually.
Nearby Locations
Prices sourced from the UK Government CMA Open Data Scheme, updated every 30 minutes. CheckFuelPrices is editorially independent — read our policy.