Weekly bulletin, 5 to 11 October 2026. Published Monday 12 October 2026.
Petrol prices in Carmarthen: down 1.3p this week to 171.7p
Between Monday 5 October 2026 and Sunday 11 October 2026, the average price of unleaded across 6 filling stations in Carmarthen fell 1.3p to 171.7p a litre, while diesel fell 2.0p to 196.9p.
Cheapest and most expensive
On Sunday 11 October 2026, prices updated within 30 days, judged against their neighbours.
The last 30 days
Daily averages, in pence per litre. Right-click the image to save it; it is free to publish with a link.
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6 of the 7 stations seen during the week changed at least one price.
The cheapest unleaded in Carmarthen on Sunday 11 October 2026 was 169.9p at Gwalia Garage, Carmarthen (SA32 7DR); the most expensive was 174.9p at Asda White Mill Express Petrol, Carmarthen (SA32 7EN), a gap of 5.0p, or £2.50 on a 50-litre tank.
The cheapest diesel was 195.9p at Gwalia Garage, Carmarthen (SA32 7DR).
Across the UK, unleaded was down 0.4p over the same week, at 174.1p, which puts Carmarthen 2.4p below the national average.
"Drivers in Carmarthen paid 1.3p less for a litre of unleaded this week. On a 50-litre tank, that is £0.65 less than a week earlier. The gap between the cheapest and the dearest forecourt in Carmarthen is 5.0p, so where you fill up still matters more than when." said Jacky A., editor of fuelpricetoday.co.uk.
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Petrol prices in Carmarthen: down 1.3p this week to 171.7p Between Monday 5 October 2026 and Sunday 11 October 2026, the average price of unleaded across 6 filling stations in Carmarthen fell 1.3p to 171.7p a litre, while diesel fell 2.0p to 196.9p. 6 of the 7 stations seen during the week changed at least one price. The cheapest unleaded in Carmarthen on Sunday 11 October 2026 was 169.9p at Gwalia Garage, Carmarthen (SA32 7DR); the most expensive was 174.9p at Asda White Mill Express Petrol, Carmarthen (SA32 7EN), a gap of 5.0p, or £2.50 on a 50-litre tank. The cheapest diesel was 195.9p at Gwalia Garage, Carmarthen (SA32 7DR). Across the UK, unleaded was down 0.4p over the same week, at 174.1p, which puts Carmarthen 2.4p below the national average. "Drivers in Carmarthen paid 1.3p less for a litre of unleaded this week. On a 50-litre tank, that is £0.65 less than a week earlier. The gap between the cheapest and the dearest forecourt in Carmarthen is 5.0p, so where you fill up still matters more than when." said Jacky A., editor of fuelpricetoday.co.uk. Source: fuelpricetoday.co.uk, weekly bulletin for Carmarthen, 5 to 11 October 2026. https://fuelpricetoday.co.uk/press/2026-W41/town-carmarthen Prices are pence per litre, computed from the government's Fuel Finder open data. Free to use with a link to the source.
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- Every station (CSV)
Name, brand, postcode, coordinates, unleaded and diesel on 5 Oct and 11 Oct.
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All the figures on this page, with the 30-day series.
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Terms of use
Free to use, quote and publish, including the chart and the data, with a link to https://fuelpricetoday.co.uk/press/2026-W41/town-carmarthen or a credit to fuelpricetoday.co.uk. Prices are computed from the Fuel Finder open data published by the Department for Energy Security and Net Zero under the Open Government Licence v3.0. Questions, a figure for another area, or a quote: contact@fuelpricetoday.co.uk.
How the figures are computed
Each average is the mean of the prices changed in the last 7 days at the filling stations of Carmarthen, motorway services left out and prices more than 25p from the day's median discarded. The cheapest and most expensive stations are judged against the stations within 10 km, so that a typing error cannot top the list. The week runs from Monday to Sunday. Details on how this site works.