Fuel prices

Petrol and diesel prices in Carmarthenshire

Average pump prices across 43 filling stations in Carmarthenshire, from the prices every UK forecourt must now publish under the government’s Fuel Finder scheme. Checked 31 Oct, 19:32.

Last updated: 31 October 2026
Data source: Fuel Finder statutory scheme,Office for National Statistics
Records analysed: 8,148 filling stations
Methodology: View methodology

Average unleaded petrol 168.3p 3.2p below the UK average
Average diesel 196.4p 2.3p below the UK average
Cheapest petrol 164.9p Lewis Retail Drefach Ltd
Filling stations 43 20 at supermarkets

Unleaded petrol averages 168.3p a litre across 36 forecourts in Carmarthenshire, 3.2p below the UK average. Diesel averages 196.4p, 2.3p below the UK average. The cheapest petrol is at Lewis Retail Drefach Ltd, 164.9p; the dearest is 172.9p. The cheapest diesel is at Murco Gwalia Garage, 193.9p.

Cheapest petrol and diesel in Carmarthenshire

Unleaded petrol (E10)
Filling station	Price
Lewis Retail Drefach Ltd Llanelli	164.9p
Murco Gwalia Garage Carmarthen	165.9p
Murco Tanerdy Garage Carmarthen	165.9p
Texaco Vst Pensarnau Service Station Castell Newydd Emlyn	165.9p
Windy Corner Garage Pencader	165.9p
Valero Ascona Gorslas Service Station Gorslas	166.7p
Murco Daniel Davies and Sons Limited SA44	166.9p
Valero MFG Cross Hands Gorslas / Cross Hands	166.9p
Esso Rontec Cross Hands Llanelli	166.9p
Tesco Ammanford Superstore Rhydaman	167.9p

Diesel (B7)
Filling station	Price
Murco Gwalia Garage Carmarthen	193.9p
Murco Tanerdy Garage Carmarthen	193.9p
Windy Corner Garage Pencader	193.9p
Asda Pontyates Express Petrol Pontyates	194.9p
MFG Morrisons Carmarthen Carmarthen	194.9p
Tesco Carmarthen Extra Caerfyrddin	195.9p
Lewis Retail Drefach Ltd Llanelli	195.9p
MFG Morrisons Llanelli Llanelli	195.9p
Nts Llanelli Service Station Llanelli	195.9p
Murco Sandy Road Llanelli	195.9p

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Supermarkets against other forecourts

Supermarket petrol is not cheaper on average than at other forecourts in Carmarthenshire.

Average prices by type of forecourt in Carmarthenshire
Forecourts	Petrol	Diesel	Stations
Supermarkets	168.3p	196.4p	15
Other forecourts	168.1p	196.1p	20

Council areas in Wales, cheapest first

Carmarthenshire is the cheapest of 21 for petrol.

Council areas in Wales: average fuel prices
Area	Petrol	Diesel	Stations
Carmarthenshire	168.3p	196.4p	43
Bridgend	168.4p	198.2p	18
Pembrokeshire	168.5p	196.1p	32
Isle of Anglesey	168.8p	195.8p	16
Rhondda Cynon Taf	168.9p	198.1p	26
Caerphilly	168.9p	197.4p	23
Neath Port Talbot	170.0p	197.3p	18
Blaenau Gwent	170.3p	197.3p	9
Ceredigion	170.9p	198.9p	26
Gwynedd	171.4p	198.3p	37
Monmouthshire	171.5p	201.4p	20
Swansea	171.6p	198.6p	29
Cardiff	171.6p	199.2p	31
Merthyr Tydfil	171.7p	198.6p	5
Vale of Glamorgan	172.1p	198.4p	11
Wrexham	172.1p	198.5p	18
Newport	172.9p	199.5p	17
Powys	174.0p	200.6p	49
Flintshire	174.5p	200.0p	31
Conwy	174.6p	201.2p	17
Denbighshire	178.7p	200.1p	17

Every filling station in Carmarthenshire

Every filling station in Carmarthenshire and its prices
Filling station	Petrol	Diesel	Updated
Lewis Retail Drefach Ltd Llanelli · supermarket	164.9p	195.9p	27 Oct, 10:33
Murco Gwalia Garage Carmarthen	165.9p	193.9p	30 Oct, 06:34
Murco Tanerdy Garage Carmarthen	165.9p	193.9p	30 Oct, 06:34
Texaco Vst Pensarnau Service Station Castell Newydd Emlyn · supermarket	165.9p	197.9p	28 Oct, 06:22
Windy Corner Garage Pencader	165.9p	193.9p	31 Oct, 10:25
Valero Ascona Gorslas Service Station Gorslas	166.7p	196.7p	30 Oct, 17:47
Murco Daniel Davies and Sons Limited SA44	166.9p	–	27 Oct, 12:14
Valero MFG Cross Hands Gorslas / Cross Hands	166.9p	196.9p	29 Oct, 23:46
Esso Rontec Cross Hands Llanelli	166.9p	196.9p	30 Oct, 10:12
Tesco Ammanford Superstore Rhydaman · supermarket	167.9p	–	26 Oct, 14:45
Valero Ascona Forge Carmarthen Road	167.9p	196.9p	29 Oct, 07:20
Valero Ascona Ivy Service Station St Clears	167.9p	196.9p	29 Oct, 07:19
Valero Ascona Tenby Road Service Station Carmarthen	167.9p	196.9p	29 Oct, 08:03
Essar Penybanc Service Statioin Ammanford	167.9p	–	27 Oct, 13:55
Texaco Glanamman Service Station Ammanford · supermarket	167.9p	–	27 Oct, 12:38
MFG Morrisons Carmarthen Carmarthen · supermarket	167.9p	194.9p	30 Oct, 23:43
Esso MFG St Clears Tenby Road, St Clears	167.9p	196.9p	28 Oct, 23:47
Texaco Vst Parkstreet SA18 · supermarket	167.9p	–	25 Oct, 20:31
Texaco Vst Pontamman Service Station Ammanford · supermarket	167.9p	–	25 Oct, 06:01
Texaco Vst Towy Services Station Caerfyrddin · supermarket	167.9p	197.9p	28 Oct, 00:34
Asda Pontyates Express Petrol Pontyates	168.9p	194.9p	27 Oct, 15:37
MFG Morrisons Llanelli Llanelli · supermarket	168.9p	195.9p	27 Oct, 22:01
Valero MFG Panteg Panteg	168.9p	–	27 Oct, 23:42
Nts Llanelli Service Station Llanelli · supermarket	168.9p	195.9p	28 Oct, 10:20
Shell Valley Service Station Llandysul	168.9p	195.9p	26 Oct, 18:25
Texaco Vst Bryn Gelli Services Llanelli · supermarket	168.9p	–	27 Oct, 00:15
Texaco Ascona Manordeilo Service Station Llandeilo	169.9p	196.9p	31 Oct, 09:29
Tesco Carmarthen Extra Caerfyrddin · supermarket	169.9p	195.9p	30 Oct, 15:30
Murco Checkpoint Service Station Carmarthenshire · supermarket	169.9p	–	26 Oct, 17:14
Dafen Service Station Llanelli	169.9p	–	29 Oct, 08:40
Tesco Llanelli Extra Llanelli · supermarket	169.9p	–	29 Oct, 13:51
Oil 4 Wales Morris Isaacs Llandovery	169.9p	196.9p	31 Oct, 05:25
Oil 4 Wales Ltd Nantycaws Caerfyrddin · supermarket	169.9p	196.9p	27 Oct, 16:18
Murco Sandy Road Llanelli	169.9p	195.9p	19 Oct, 15:58
Murco Llandeilo Service Station Llandeilo	171.9p	197.9p	22 Oct, 08:54
Esso Asda Pont Abraham Express Petrol Llanedi · motorway	172.9p	199.9p	23 Oct, 16:58
Asda Llanelli Murray Street Supercentre Llanelli · supermarket	–	–	13 Oct, 18:57
Esso Asda White Mill Express Petrol Carmarthen	–	–	28 Sept, 15:56
Murco Cks Supermarket Carmarthen · supermarket	–	–	13 Oct, 10:15
Murco Derwydd Services Carmarthen · supermarket	–	–	14 Oct, 07:42
Essar Chivers Corner Garage Camarthenshire · supermarket	–	–	12 Oct, 15:05
Esso Glandycross Service Station Clynderwen · supermarket	–	–	16 Sept, 13:05
Murco Kidwelly Service Station Kidwelly	–	–	9 Oct, 16:40

A dash means no current price: none reported, not changed for over two weeks, or not believable.

Average prices in Carmarthenshire, day by day

Average petrol and diesel prices, 15 Sept 2026 to 31 Oct 2026

160p

170p

180p

190p

200p

15 Sept 2026 22 Sept 2026 29 Sept 2026 6 Oct 2026 13 Oct 2026 20 Oct 2026 31 Oct 2026

Average fuel prices in Carmarthenshire by day
Day	Diesel	Petrol
15 Sept 2026	191.6p	168.9p
16 Sept 2026	192.3p	169.5p
17 Sept 2026	192.9p	170.0p
18 Sept 2026	194.2p	170.5p
19 Sept 2026	195.1p	170.7p
20 Sept 2026	195.4p	170.8p
21 Sept 2026	195.8p	171.1p
22 Sept 2026	197.0p	171.6p
23 Sept 2026	196.9p	171.7p
24 Sept 2026	197.2p	171.9p
25 Sept 2026	197.8p	172.2p
26 Sept 2026	198.2p	172.3p
27 Sept 2026	198.3p	172.5p
28 Sept 2026	198.6p	172.5p
29 Sept 2026	198.9p	172.8p
30 Sept 2026	199.1p	172.9p
1 Oct 2026	199.2p	173.1p
2 Oct 2026	199.2p	173.1p
3 Oct 2026	199.2p	173.3p
4 Oct 2026	199.2p	173.3p
5 Oct 2026	199.1p	173.2p
6 Oct 2026	198.8p	173.4p
7 Oct 2026	198.2p	173.2p
8 Oct 2026	198.1p	172.9p
9 Oct 2026	197.7p	172.6p
10 Oct 2026	197.6p	172.4p
11 Oct 2026	197.5p	172.4p
12 Oct 2026	197.3p	172.1p
13 Oct 2026	197.5p	172.0p
14 Oct 2026	197.3p	172.8p
15 Oct 2026	197.3p	171.9p
16 Oct 2026	197.0p	171.5p
17 Oct 2026	197.0p	171.4p
18 Oct 2026	196.9p	171.4p
19 Oct 2026	196.6p	171.1p
20 Oct 2026	196.5p	170.9p
21 Oct 2026	196.5p	170.9p
22 Oct 2026	196.5p	170.8p
23 Oct 2026	196.6p	170.8p
24 Oct 2026	196.5p	170.3p
25 Oct 2026	196.5p	170.9p
26 Oct 2026	196.6p	169.9p
27 Oct 2026	196.4p	169.4p
28 Oct 2026	196.4p	169.0p
29 Oct 2026	196.4p	168.7p
30 Oct 2026	196.4p	168.4p
31 Oct 2026	196.4p	168.3p

Source:Fuel Finder,ONS Prices at 19:32 on 31 October 2026 Updated 31 Oct 2026

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Data sources and methodology

Datasets used on this page
Figures	Source	Period	Records	Updated
Forecourt prices	Fuel Finder open data Fuel Finder statutory scheme ONS Postcode Directory Office for National Statistics	Prices at 19:32 on 31 October 2026	8,148 filling stations	31 October 2026

Averages use unleaded (E10) and standard diesel (B7) prices at open forecourts, leaving out prices unchanged for over two weeks or far from every other forecourt. They count each forecourt once, not by how much fuel it sells.
Forecourts are placed in council areas from their postcode, using the ONS Postcode Directory.

How we calculate these figures All data sources

Source: Fuel Finder, the UK government’s statutory fuel price scheme.

Source: Office for National Statistics licensed under the Open Government Licence v3.0. Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026.