Use Current Location

Average Petrol Price in Carmarthenshire

Petrol (E10)168.8p
Diesel (B7S)190.4p

Today the average petrol price in Carmarthenshire is 168.80p per litre. 0.3p lower than the average price in Wales.

The current average price of diesel is 190.41p per litre. 0.7p below the Welsh average price for diesel.

We calculate the daily averages by analysing price data from the 58 petrol stations in Carmarthenshire that are sending price changes to the Fuel Finder system.

Cheapest Petrol in Carmarthenshire

The cheapest petrol in Carmarthenshire is in Ammanford (165.4p per litre).

Currently, buying 60 litres of petrol in Ammanford costs £12.90 less than in Llanedi (186.9p per litre).

Average Fuel Prices by City/Town

Select a town or city to view local petrol station price data.

TOWN/CITY STATIONS PETROL DIESEL
Ammanford4165.40p186.15p
Carmarthen5166.90p188.70p
Cross Hands1169.90p189.90p
Gorslas1169.70p189.70p
Kidwelly1169.90p189.90p
Llandeilo2168.30p195.80p
Llanedi1186.90p199.90p
Llanelli9167.43p188.66p
Llanwrda1169.90p191.90p
Pontyates1171.90p191.90p
St Clears2169.90p191.90p

Average petrol prices last updated at 13 Sep 2026 10:00 (20 hours, and 46 minutes ago).

Petrol & Diesel Price Trends

The average price of petrol in Carmarthenshire has increased by 4.7p in the last week. Diesel has risen by 5.3p.

In the last month, petrol has increased by 8.9p and diesel has risen by 10.1p.