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Average Petrol Price in Carmarthenshire

Petrol (E10)170.6p
Diesel (B7S)197.6p

Today the average petrol price in Carmarthenshire is 170.59p per litre. 2.0p lower than the average price in Wales.

The current average price of diesel is 197.62p per litre. 1.0p 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 (167.9p per litre).

Currently, buying 60 litres of petrol in Ammanford costs £3.00 less than in Llanedi (172.9p 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
Ammanford4167.90p195.90p
Carmarthen5170.30p196.10p
Cross Hands1167.90p196.90p
Gorslas1168.70p196.70p
Kidwelly1169.90p195.90p
Llandeilo2170.90p197.90p
Llanedi1172.90p199.90p
Llanelli9169.88p196.77p
Llanwrda1169.90p199.90p
Pontyates1168.90p194.90p
St Clears2168.90p196.90p

Average petrol prices last updated at 28 Oct 2026 10:00 (20 hours, and 38 minutes ago).

Petrol & Diesel Price Trends

The average price of petrol in Carmarthenshire has decreased by 1.7p in the last week. Diesel has fallen by 0.4p.

In the last month petrol has dropped by 3p and. and diesel has fallen by 1.6p.