Use Current Location

Average Petrol Price in Carmarthenshire

Petrol (E10)156.7p
Diesel (B7S)175.3p

Today the average petrol price in Carmarthenshire is 156.67p per litre. 0.6p higher than the average price in Wales.

The current average price of diesel is 175.29p per litre. 1.8p below the Welsh average price for diesel.

We calculate the daily averages by analysing price data from the 59 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 (153.7p per litre).

Currently, buying 60 litres of petrol in Ammanford costs £15.75 less than in Llanedi (179.9p 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
Ammanford4153.65p176.65p
Carmarthen5154.30p171.30p
Cross Hands1154.90p174.90p
Gorslas1154.70p174.70p
Kidwelly1157.90p176.90p
Llandeilo2156.40p176.40p
Llanedi1179.90p199.90p
Llanelli9153.99p174.54p
Llanwrda1157.90p182.90p
Pontyates1155.90p175.90p
St Clears2154.90p174.90p

Average petrol prices last updated at 12 Jun 2026 10:00 (14 hours, and 16 minutes ago).

Petrol & Diesel Price Trends

The average price of petrol in Carmarthenshire has decreased by 0.7p in the last week. Diesel has fallen by 2.9p.

In the last month petrol has dropped by 0.9p and. and diesel has fallen by 9.6p.