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Average Petrol Price in Carmarthenshire

Petrol (E10)158.0p
Diesel (B7S)175.7p

Today the average petrol price in Carmarthenshire is 157.97p per litre. 0.2p lower than the average price in Wales.

The current average price of diesel is 175.74p per litre. 0.3p 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 (151.5p per litre).

Currently, buying 60 litres of petrol in Ammanford costs £20.06 less than in Llanedi (184.9p 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
Ammanford4151.48p170.40p
Carmarthen5156.70p172.50p
Cross Hands1159.90p177.90p
Gorslas1159.70p177.70p
Kidwelly1161.90p177.90p
Llandeilo2159.30p179.80p
Llanedi1184.90p202.90p
Llanelli9157.32p175.54p
Llanwrda1159.90p179.90p
Pontyates1161.90p177.90p
St Clears2159.90p177.90p

Average petrol prices last updated at 28 Jul 2026 10:00 (5 hours, and 14 minutes ago).

Petrol & Diesel Price Trends

The average price of petrol in Carmarthenshire has increased by 3.2p in the last week. Diesel has risen by 5.7p.

In the last month, petrol has increased by 6.1p and diesel has risen by 10.4p.