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Live prices · 42 forecourts

Petrol and diesel prices in Carmarthenshire

Prices at 42 forecourts in Carmarthenshire, as reported to the UK Government's Fuel Finder scheme. The cheapest unleaded today is 159.9p at Lewis Retail Drefach Ltd; the cheapest diesel is 191.9p at Gwalia Garage.

Updated 9 Nov 2026, 04:28Part of Wales
Open the live map hereAll UK areas

Cheapest in Carmarthenshire now

Live
  • Unleaded
  • Diesel
  • Super
  • Prem. diesel
Lowest price for each fuel among the forecourts below — each may be at a different forecourt.

Today's prices in Carmarthenshire

Averages of every forecourt here with a price reported in the last 30 days, compared with the UK.

Unleaded (E10)

166.2paverage

£7.56 a gallon

3.1p below UK average

Cheapest 159.9p at Lewis Retail Drefach Ltdreported 4 Nov 2026, 10:02

42 forecourts with a recent price

Diesel (B7)

195.6paverage

£8.89 a gallon

2.1p below UK average

Cheapest 191.9p at Gwalia Garagereported 7 Nov 2026, 10:16

40 forecourts with a recent price

Super unleaded (E5)

185.7paverage

£8.44 a gallon

1.6p below UK average

Cheapest 177.9p at Carmarthen Extra - Petrol Filling Stationreported 4 Nov 2026, 14:03

17 forecourts with a recent price

Super diesel (B7)

216.2paverage

£9.83 a gallon

0.1p above UK average

Cheapest 213.9p at Nts Llanelli Service Stationreported 8 Nov 2026, 22:02

3 forecourts with a recent price

Every forecourt in Carmarthenshire, cheapest first

Sort by any fuel. Each price shows when the forecourt reported it.

  • Lewis Retail Drefach Ltd

    Nisa Local Drefach · SA14 7BA · Nisa

    Unleaded
    159.9p4 Nov 2026, 10:02
    Diesel
    192.9p4 Nov 2026, 10:02
    Super
    —
    Prem. diesel
    —
  • Asda Pontyates Express Petrol

    Asda · SA15 5TR · 13 Heol Y Meinciau

    Unleaded
    161.9p7 Nov 2026, 15:50
    Diesel
    194.9p27 Oct 2026, 15:37
    Super
    —
    Prem. diesel
    —

    24 hours

  • Morris Isaacs

    Oil 4 Wales · SA20 0EG · Morris Isaacs Garage

    Unleaded
    162.9p8 Nov 2026, 05:30
    Diesel
    191.9p8 Nov 2026, 05:30
    Super
    —
    Prem. diesel
    —
  • Gwalia Garage

    Murco · SA32 7DR · Gwalia Garage

    Unleaded
    163.9p5 Nov 2026, 09:47
    Diesel
    191.9p7 Nov 2026, 10:16
    Super
    —
    Prem. diesel
    —
  • MFG Morrisons Carmarthen

    Morrisons · SA31 2NF · Carmarthen

    Unleaded
    163.9p7 Nov 2026, 23:48
    Diesel
    193.9p9 Nov 2026, 00:03
    Super
    185.9p5 Nov 2026, 23:52
    Prem. diesel
    —

    24 hoursAdBlue pumps

  • Tanerdy Garage

    Murco · SA31 2EY · Carmarthen

    Unleaded
    163.9p5 Nov 2026, 09:48
    Diesel
    192.9p7 Nov 2026, 10:17
    Super
    —
    Prem. diesel
    —
  • Valley Service Station

    Shell · SA44 4AE · Pencader Road,

    Unleaded
    163.9p6 Nov 2026, 12:09
    Diesel
    193.9p2 Nov 2026, 19:07
    Super
    183.9p6 Nov 2026, 12:09
    Prem. diesel
    —
  • Windy Corner Garage

    Windy Corner Garage · SA39 9HP · Windy Corner Garage

    Unleaded
    163.9p6 Nov 2026, 09:33
    Diesel
    191.9p8 Nov 2026, 11:10
    Super
    —
    Prem. diesel
    —

    24 hours

  • Ascona Gorslas Service Station

    Valero · SA14 7LW · Llandeilo Road

    Unleaded
    164.7p6 Nov 2026, 10:51
    Diesel
    196.7p27 Oct 2026, 16:52
    Super
    —
    Prem. diesel
    —
  • Ascona Manordeilo Service Station

    Texaco · SA19 7BN · A40 Manordeilo

    Unleaded
    164.7p8 Nov 2026, 12:56
    Diesel
    195.7p8 Nov 2026, 12:56
    Super
    —
    Prem. diesel
    —
  • Kidwelly Service Station

    Murco · SA17 4TA · NO 3-5

    Unleaded
    164.9p6 Nov 2026, 12:00
    Diesel
    194.9p6 Nov 2026, 12:00
    Super
    —
    Prem. diesel
    —
  • MFG Cross Hands

    Valero · SA14 6RR · Crosshands Road

    Unleaded
    164.9p5 Nov 2026, 23:45
    Diesel
    196.9p26 Oct 2026, 23:50
    Super
    185.9p5 Nov 2026, 23:45
    Prem. diesel
    —

    24 hours

  • Daniel Davies and sons Limited

    Murco · SA44 5EB · Bargoed Garage

    Unleaded
    165.9p5 Nov 2026, 08:23
    Diesel
    193.9p5 Nov 2026, 08:23
    Super
    —
    Prem. diesel
    —
  • Llandeilo Service Station

    Murco · SA19 6LU · Llandeilo Service Station

    Unleaded
    165.9p6 Nov 2026, 15:46
    Diesel
    196.9p6 Nov 2026, 09:28
    Super
    —
    Prem. diesel
    —
  • MFG Morrisons Llanelli

    Morrisons · SA14 9UZ · Llanelli

    Unleaded
    165.9p7 Nov 2026, 22:19
    Diesel
    194.9p8 Nov 2026, 22:00
    Super
    185.9p5 Nov 2026, 22:04
    Prem. diesel
    —

    24 hours

  • Nts Llanelli Service Station

    Esso · SA15 1QD · Llanelli

    Unleaded
    165.9p8 Nov 2026, 22:02
    Diesel
    195.9p8 Nov 2026, 22:02
    Super
    183.9p8 Nov 2026, 22:02
    Prem. diesel
    213.9p8 Nov 2026, 22:02

    24 hours

  • oil 4 wales ltd Nantycaws

    Oil 4 Wales · SA32 8BG · Nantycaws Filling Station Ltd

    Unleaded
    165.9p8 Nov 2026, 16:10
    Diesel
    195.9p8 Nov 2026, 16:10
    Super
    —
    Prem. diesel
    —

    AdBlue pumps

  • Rontec Cross Hands

    Esso · SA14 6RD · Cross Hands

    Unleaded
    165.9p3 Nov 2026, 14:31
    Diesel
    196.9p27 Oct 2026, 10:22
    Super
    184.9p3 Nov 2026, 14:31
    Prem. diesel
    215.9p27 Oct 2026, 10:22

    24 hoursAdBlue pumps

  • Vst Pensarnau Service Station

    Texaco · SA38 9HS · Pensarnau Service Station Ltd

    Unleaded
    165.9p28 Oct 2026, 06:22
    Diesel
    197.9p28 Oct 2026, 06:22
    Super
    —
    Prem. diesel
    —
  • Asda Llanelli Murray Street Supercentre

    Asda · SA15 1BX · Llanelli

    Unleaded
    166.7p5 Nov 2026, 22:22
    Diesel
    194.7p5 Nov 2026, 22:22
    Super
    —
    Prem. diesel
    —
  • Ascona Forge Filling Station

    Valero · SA33 4NA · A40 West

    Unleaded
    166.9p7 Nov 2026, 05:46
    Diesel
    196.9p20 Oct 2026, 17:51
    Super
    —
    Prem. diesel
    —

    24 hours

  • Ascona Ivy Service Station

    Valero · SA33 4JP · Tenby Road

    Unleaded
    166.9p7 Nov 2026, 00:13
    Diesel
    196.9p20 Oct 2026, 16:57
    Super
    —
    Prem. diesel
    —
  • Ascona Tenby Road Service Station

    Valero · SA33 5DT · Lysonnen Road

    Unleaded
    166.9p7 Nov 2026, 07:11
    Diesel
    196.9p20 Oct 2026, 17:05
    Super
    —
    Prem. diesel
    —

    24 hoursAdBlue pumps

  • Asda White Mill Express Petrol

    Esso · SA32 7EN · A40, Carmarthen

    Unleaded
    166.9p7 Nov 2026, 14:04
    Diesel
    195.9p6 Nov 2026, 16:21
    Super
    —
    Prem. diesel
    —
  • Dafen Service Station

    Dafen Service Station · SA14 8NS · Llanelli

    Unleaded
    166.9p5 Nov 2026, 10:24
    Diesel
    —
    Super
    196.9p5 Nov 2026, 10:24
    Prem. diesel
    —

    24 hours

  • Derwydd Services

    Murco · SA33 6TP · Derwydd Garage

    Unleaded
    166.9p2 Nov 2026, 16:10
    Diesel
    195.9p14 Oct 2026, 07:42
    Super
    —
    Prem. diesel
    —
  • Essar Chivers Corner Garage

    Essar · SA16 0BS · Church Road

    Unleaded
    166.9p6 Nov 2026, 11:45
    Diesel
    195.9p12 Oct 2026, 15:05
    Super
    181.9p6 Nov 2026, 11:45
    Prem. diesel
    —
  • MFG Panteg

    Valero · SA15 3TF · Llanelli

    Unleaded
    166.9p5 Nov 2026, 23:08
    Diesel
    196.9p14 Oct 2026, 23:15
    Super
    185.9p5 Nov 2026, 23:08
    Prem. diesel
    —
  • MFG ST Clears

    Esso · SA33 4JW · ST Clears Roundabout

    Unleaded
    166.9p6 Nov 2026, 23:42
    Diesel
    196.9p24 Oct 2026, 23:37
    Super
    189.9p5 Nov 2026, 23:42
    Prem. diesel
    —

    24 hoursAdBlue pumps

  • Sandy Road

    Murco · SA15 4DW · Llanelli

    Unleaded
    166.9p6 Nov 2026, 12:00
    Diesel
    195.9p19 Oct 2026, 15:58
    Super
    —
    Prem. diesel
    —

    24 hours

  • Vst Bryn Gelli Services

    Texaco · SA14 9AD · Llanelli

    Unleaded
    166.9p6 Nov 2026, 03:12
    Diesel
    196.9p11 Oct 2026, 22:56
    Super
    —
    Prem. diesel
    —

    24 hours

  • Vst Towy Services Station

    Texaco · SA31 2BN · Carmarthen

    Unleaded
    166.9p6 Nov 2026, 03:48
    Diesel
    195.9p2 Nov 2026, 12:49
    Super
    189.9p2 Nov 2026, 12:49
    Prem. diesel
    —

    24 hours

  • Ammanford Superstore - Petrol Filling Station

    Tesco · SA18 2LR · Tesco Stores Ltd

    Unleaded
    167.9p26 Oct 2026, 14:45
    Diesel
    195.9p16 Oct 2026, 18:01
    Super
    178.9p26 Oct 2026, 14:42
    Prem. diesel
    —
  • Carmarthen Extra - Petrol Filling Station

    Tesco · SA31 3AX · Carmarthen

    Unleaded
    167.9p4 Nov 2026, 14:06
    Diesel
    195.9p29 Oct 2026, 13:42
    Super
    177.9p4 Nov 2026, 14:03
    Prem. diesel
    —

    24 hours

  • Essar Penybanc Service Statioin

    Essar · SA18 3QS · 96 Penybanc RD

    Unleaded
    167.9p27 Oct 2026, 13:55
    Diesel
    195.9p12 Oct 2026, 15:05
    Super
    —
    Prem. diesel
    —
  • Glanamman Service Station

    Texaco · SA18 1DJ · Cwmamman road Glanaman Ammanford

    Unleaded
    167.9p27 Oct 2026, 12:38
    Diesel
    195.9p16 Oct 2026, 10:32
    Super
    182.9p31 Oct 2026, 13:16
    Prem. diesel
    —
  • Llanelli Extra - Petrol Filling Station

    Tesco · SA14 9UY · Llanelli

    Unleaded
    167.9p4 Nov 2026, 13:51
    Diesel
    195.9p2 Nov 2026, 16:00
    Super
    177.9p4 Nov 2026, 13:54
    Prem. diesel
    —

    24 hours

  • Vst Parkstreet Filling Station

    Texaco · SA18 2ET · Park Street Filling Station

    Unleaded
    167.9p25 Oct 2026, 20:31
    Diesel
    195.9p15 Oct 2026, 23:48
    Super
    —
    Prem. diesel
    —

    24 hours

  • Vst Pontamman Service Station

    Texaco · SA18 2HX · Touts

    Unleaded
    167.9p25 Oct 2026, 06:01
    Diesel
    195.9p16 Oct 2026, 06:03
    Super
    —
    Prem. diesel
    —
  • CKs Supermarket

    Murco · SA31 3HL · Carmarthen

    Unleaded
    168.9p4 Nov 2026, 12:29
    Diesel
    196.9p4 Nov 2026, 12:29
    Super
    —
    Prem. diesel
    —
  • Checkpoint Service station

    Murco · SA19 8DT · Harford

    Unleaded
    169.9p26 Oct 2026, 17:14
    Diesel
    —
    Super
    191.9p26 Oct 2026, 17:14
    Prem. diesel
    —
  • Asda Pont Abraham Express Petrol

    Esso · SA4 0FU · J49 M4 Motorway

    Unleaded
    172.9p23 Oct 2026, 16:58
    Diesel
    199.9p23 Oct 2026, 16:58
    Super
    191.9p27 Oct 2026, 12:43
    Prem. diesel
    218.9p27 Oct 2026, 09:06

    24 hoursMotorway servicesAdBlue pumps

  • Glandycross Service Station

    Esso · SA66 7XB · Tyssul Villa

    Unleaded
    —
    Diesel
    —
    Super
    —
    Prem. diesel
    —

    Temporarily closed

What the prices say in Carmarthenshire

  • Unleaded in Carmarthenshire runs from 159.9p to 172.9p — 13.0p apart, or £7.15 on a 55-litre tank.

  • The average unleaded price here is 3.1p below the UK average, and diesel is 2.1p below.

  • The 20 supermarket forecourts average 166.5p for unleaded — 0.8p more than the 21 other forecourts.

  • The motorway service area charges 172.9p for unleaded, 6.8p more than the forecourts off the motorway.

  • In the last 7 days 34 forecourts here changed an unleaded or diesel price 85 times: 83 cuts and 2 rises.

  • 18 forecourts sell fuel 24 hours a day. 24-hour petrol stations near you

  • 6 forecourts have AdBlue at the pump. AdBlue pumps near you

Carmarthenshire against the UK, day by day

Daily averages from the same forecourts and the same freshness rules as the table.

Unleaded

165p166p167p168p169p170p171p172p173p174p175p176p21 Sept15 Oct9 Nov169.4p UK166.2p Carmarthenshire
CarmarthenshireUK
Average unleaded price in Carmarthenshire and across the UK
DayCarmarthenshireUK
27 Oct169.6p172.8p
28 Oct169.3p172.6p
29 Oct169.1p172.3p
30 Oct168.8p171.9p
31 Oct168.7p171.8p
1 Nov168.7p171.7p
2 Nov168.3p171.4p
3 Nov168.3p171.0p
4 Nov167.9p170.7p
5 Nov167.4p170.2p
6 Nov166.8p169.7p
7 Nov166.5p169.5p
8 Nov166.2p169.4p
9 Nov166.2p169.4p

Diesel

195p196p197p198p199p200p21 Sept15 Oct9 Nov197.7p UK195.6p Carmarthenshire
CarmarthenshireUK
Average diesel price in Carmarthenshire and across the UK
DayCarmarthenshireUK
27 Oct196.6p198.7p
28 Oct196.5p198.6p
29 Oct196.5p198.6p
30 Oct196.5p198.4p
31 Oct196.4p198.4p
1 Nov196.3p198.4p
2 Nov196.2p198.4p
3 Nov196.2p198.3p
4 Nov196.1p198.2p
5 Nov196.0p198.0p
6 Nov195.9p197.9p
7 Nov195.9p197.8p
8 Nov195.6p197.7p
9 Nov195.6p197.7p

Across Wales as a whole, unleaded averages 168.8p and diesel 197.6p.

Brands in Carmarthenshire

Average unleaded price by brand, against the UK average.

Average unleaded price by brand in Carmarthenshire
  • Asda2 forecourts164.3p
  • Oil 4 Wales2 forecourts164.4p
  • Morrisons2 forecourts164.9p
  • Valero6 forecourts166.2p
  • Murco9 forecourts166.3p
  • Texaco7 forecourts166.9p
  • Essar2 forecourts167.4p
  • Esso5 forecourts167.7p
  • Tesco3 forecourts167.9p

UK average unleaded: 169.4pScale 163p – 170p

Towns in Carmarthenshire

Near Carmarthenshire

Questions about fuel in Carmarthenshire

Where is the cheapest petrol in Carmarthenshire today?

Lewis Retail Drefach Ltd (Nisa, SA14 7BA) at 159.9p a litre, reported 4 Nov 2026, 10:02. Next is Asda Pontyates Express Petrol at 161.9p. Prices can change before you arrive.

Where is the cheapest diesel in Carmarthenshire today?

Gwalia Garage (Gwalia Garage, SA32 7DR) at 191.9p a litre, reported 7 Nov 2026, 10:16. Next is Morris Isaacs at 191.9p. Prices can change before you arrive.

What is the average price of petrol in Carmarthenshire?

Unleaded (E10) averages 166.2p a litre across 42 forecourts, against 169.4p for the UK as a whole. Diesel averages 195.6p. The averages use only prices reported in the last 30 days.

Which forecourts in Carmarthenshire are open 24 hours?

Asda Pontyates Express Petrol, MFG ST Clears, Rontec Cross Hands, MFG Cross Hands, Vst Parkstreet Filling Station and Asda Pont Abraham Express Petrol, and 12 more list 24-hour fuel. Hours come from the retailers themselves; the station pages show each day's times.

Where can I get AdBlue at the pump in Carmarthenshire?

MFG ST Clears, Rontec Cross Hands, Asda Pont Abraham Express Petrol, oil 4 wales ltd Nantycaws, Ascona Tenby Road Service Station and MFG Morrisons Carmarthen report AdBlue pumps to the government's Fuel Finder scheme. Find the nearest AdBlue pump from anywhere in the UK.

How often do fuel prices change in Carmarthenshire?

Over the last week, 34 forecourts changed an unleaded or diesel price, 85 times in all (83 cuts, 2 rises). Retailers must report each change to the Fuel Finder scheme within 30 minutes, and FuelWise picks it up at its next read of the feed.

Get told when fuel in Carmarthenshire gets cheaper

Price-drop alerts, your saved stations and CarPlay are coming in the FuelWise iPhone app, which is in final testing. Prices here stay free on the web.

Coming soon

Prices are reported by the forecourts themselves to the UK Government's Fuel Finder scheme, which requires every change to be published within 30 minutes. FuelWise reads the feed every 15 minutes and last updated these figures on 9 Nov 2026, 04:28. Each price shows when it was reported; prices older than 30 days and stations that have stopped reporting are left out.

How we calculate averages · Contains public sector information licensed under the Open Government Licence v3.0.