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Petrol Prices in Carmarthen

Average today: unleaded 166.0p · diesel 186.3p · UK average 167.7p / 189.2p

Checked 10 September 2026 · retailer-reported prices, changes filed within 30 minutes
Carmarthen trend: Unleaded ▲ 5.5p · 7d · Diesel ▲ 5.5p · 7d
The cheapest unleaded in Carmarthen today is 163.9p at Murco, Tanerdy Garage. Filling a 55-litre tank at the cheapest station instead of the priciest saves about £3.30.

Cheapest Unleaded First

CheapestSet 09 Sep · Checked today
Murco Tanerdy Garage, SA31 2EY
UNLEADED
163.9p
DIESEL
183.9p
Save up to £3.30 on a tank
Set 09 Sep · Checked today
Murco Derwydd Garage, SA33 6TP
UNLEADED
164.9p
DIESEL
184.9p
Save up to £2.75 on a tank
Set 07 Sep · Checked today
Morrisons Parc Pensarn, SA31 2NF
UNLEADED
164.9p
DIESEL
185.9p
Save up to £2.75 on a tank
Set 09 Sep · Checked today
Murco Gwalia Garage, SA32 7DR
UNLEADED
164.9p
DIESEL
183.9p
Costs £0.55 more to fill up
Set 09 Sep · Checked today
Valero Lysonnen Road, SA33 5DT
UNLEADED
166.9p
DIESEL
187.9p
Costs £1.65 more to fill up
Set 09 Sep · Checked today
Murco C K's Supermarket, SA31 3HL
UNLEADED
166.9p
DIESEL
187.9p
Costs £1.65 more to fill up
Set 08 Sep · Checked today
Esso A40, Carmarthen, SA32 7EN
UNLEADED
169.9p
DIESEL
189.9p
Costs £3.30 more to fill up
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